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SlimFast Review - 15 Things You Need to Know

SlimFast is a well-established line of meal replacement shakes and bars. The company claims that the current version of the product has been perfected following more than fifty clinical studies, offering more options than ever before. However, the SlimFast program works in conjunction with a sensible, calorie-restricted meal plan and regular exercise. Many diet products work well in tandem with calorie counting and a consistent exercise plan, and SlimFast products do not contain ingredients that are formulated to burn fat rapidly.

Nonetheless, our research team wanted to look into the current offerings to determine how they stack up. Read on to learn about the modern line of SlimFast options and to get the Bottom Line on the product as a whole.

SlimFast can be purchased through their Official Site.

SlimFast Readers: Noom is offering our readers a risk-free trial, for a limited time. Click here for more information!

What Is SlimFast?

SlimFast is a comprehensive weight loss program centered around meal replacements, including shakes, smoothies, and bars. This program offers a variety of options, giving individuals the flexibility to choose foods that align with their taste preferences, extending beyond the stereotypical limitations of just fruits and vegetables or reliance on shakes and smoothies.

The current iteration of SlimFast differs from its past version, as the brand underwent a change in ownership in 2014 when Unilever sold it. This transition brought about notable adjustments and enhancements. The revamped SlimFast system integrates insights from multiple clinical studies to refine the diet plan, expanding the range of dietary choices. Unlike the earlier emphasis on shakes alone, the updated plan assures weight loss through a combination of tasty snacks, meal replacements, and one sensible meal daily.

Under the new SlimFast plan, participants are encouraged to consume two SlimFast meal replacements, along with three 100-calorie snacks of their choice—options include SlimFast snack bars, fruits, vegetables, or nuts. Additionally, individuals are responsible for preparing a 500-calorie meal as part of the daily regimen, allowing for a total of six eating occasions throughout the day. The program outlines a gradual and safe weight loss goal of 1 to 2 pounds per week through this approach.

Despite its weight loss focus, SlimFast operates as a branded weight-loss method with a visible commercial aspect. A visit to SlimFast.com, the official website of the weight loss plan, reveals not only diet plans and recipes but also a range of products available for purchase, essential for adhering to the SlimFast diet plan.

The cornerstone product is meal replacements, so do they really work?

  • Obesity (A Research Journal) – Meal replacement shakes are big business. Some companies have gone so far as to complete large-scale studies into the impact of meal replacement programs on weight loss compared to traditional food-based diets.
  • Metabolism – The idea is to replace a meal that would have more calories with one that has much fewer calories. This hypocaloric balance is what promotes weight loss.
  • Nutrients – However, it doesn’t appear that you necessarily have to replace more than one meal a day to see weight-loss results.

NOTE: To avoid confusion, here’s a brief clarification. SlimFast is a brand name that refers to a diet plan and a range of products. If you want to do this weight loss plan, you will have to follow the SlimFast diet plan and purchase SlimFast products, including meal replacement shakes, smoothies, and SlimFast snacks.

SlimFast Contact Information

Toll Free: (800) SLIMFAST or (800) 754-6327

Email: customercare@slimfast.com

SlimFast Competitors

Other similar products: 18 Shake, 310 Shake
Company Bio

How Did SlimFast Start?

SlimFast originated in 1977 as a product line under the Thompson Medical Company, a company founded in the 1940s by S. Daniel Abraham. The Thompson Medical Company was also known for marketing the controversial weight loss dietary supplement Dexatrim.

In 1987, Abraham privatized the SlimFast brand, and it underwent ownership changes over the years. Unilever acquired SlimFast in 2000, and then in 2014, the brand was sold to Kainos Capital. Subsequently, in 2018, Glanbia Plc. acquired SlimFast from Kainos Capital.

The development and manufacturing of SlimFast products are overseen by KSF Acquisition Corporation, headquartered in West Palm Beach, Florida, USA. Although information about KSF Acquisition Corporation is not readily available online, it is known that this company is an investee of Kainos Capital, the entity that acquired SlimFast from Unilever in 2014.

For those seeking customer support or wanting to contact SlimFast, the customer care address is 11780 U.S Highway 1 400N, Palm Beach Gardens, FL 33408.

Slimfast claims


SlimFast Claims

The SlimFast plan promise is simple. It claims to provide significant weight reduction without having to get hungry and without having to struggle with tasteless meals.

It promises to shed pounds with one sensible meal for the day complemented by meal replacements and tasty SlimFast snacks. Moreover, it claims that results become noticeable in just one week.

As stated on SlimFast.com, you can achieve 50% more weight reduction using the SlimFast diet plan compared to reduced-calorie diets.


SlimFast Products And Ingredients

Here’s a summary of SlimFast’s products:

SlimFast Shakes

  • The shakes are individually bottled for ease of use
  • They are available in 5 flavors: Rich Chocolate Royale, French Vanilla, Strawberries & Cream, Cappuccino Delight, and Creamy Milk Chocolate
  • The shakes contain 10 grams of protein, 5 grams of fiber, 19 grams of sugar, 1 gram of net carbohydrates, and 24 vitamins and minerals.
  • Every bottle of the SlimFast shake contains the same amount of caffeine in a cup of coffee.
  • This new formulation (as compared to the Unilever formulation) is claimed to be 99.8% lactose-free.

SlimFast Smoothies

  • The smoothies are sold in mixes. The tubs provide enough product for approximately 12 smoothies
  • The smoothies come in 2 flavors: Vanilla and Creamy Chocolate.
  • Each smoothie serving contains 20 grams of protein, 5 grams of fiber, and 24 vitamins and minerals.
  • Each serving provides the same amount of caffeine you can get from a cup of coffee.
  • The smoothies are gluten-free.

SlimFast Bars

  • These are available in multiple flavors: Peanut Butter Chocolate, Creamy Chocolate Mousse, Double Chocolate Cookie Dough, Whipped Triple Chocolate, Chocolate Chip Cookie Dough, Salted Caramel Macadamia Nut, Nutty Caramel and Nougat, and Whipped Peanut Butter Chocolate
  • Each pack contains 190 calories, 7 grams of protein, 9 grams of fiber, and 3 grams of sugar.
  • SlimFast bars are also meant to provide 4 hours of hunger control.

Keto Hydration

  • Available in only one flavor, Orange Mango.
  • Hydrates the body while adding B Complex and electrolytes to support energy consumption.
  • Add a scoop to 8 oz of water and shake well.
  • Each 8 oz you drink contains; 5 calories, 1 gram of carbohydrates, 150 mg of magnesium, 120 mg of Vitamin C, and 2mg of Vitamin B6.

According to Nutrientsvitamin B “may also promote myelination, cellular metabolism, and energy storage.”

Unfortunately, we couldn’t find information about the specific ingredients used in SlimFast’s products (shake, smoothie, and snacks). The only information available is that these products are gluten-free and high in fiber.

These product lines contain various powders, pre-made shakes, supplements, and more. SlimFast also sells special lines of products, like:

  • SlimFast Advanced Nutrition Shakes (Creamy Chocolate, Vanilla Cream, Strawberries & Cream, Bananas & Cream)
  • SlimFast Original Shake Mixes (Rich Chocolate Royale, French Vanilla, Strawberries & Cream, Creamy Milk Chocolate)
  • SlimFast Keto Fat Bomb Snack Cups (Peanut Butter Chocolate, Caramel Nuts & Chocolate, Mint Chocolate, Coconut Cream Dark Chocolate, Iced Lemon Drop, Caramel Chocolate)
  • SlimFast Keto Fat Bomb Meal Bars (Whipped Peanut Butter Chocolate, Nutty Caramel & Nougat, Frosted Cinnamon Bun, Whipped Triple Chocolate, Chocolate Chip Cookie Dough)
  • SlimFast Original Shakes (Creamy Milk Chocolate, French Vanilla, Cappuccino Delight, Rich Chocolate Royale, Strawberries & Cream)
  • SlimFast Keto Meal Shakes to Go (Creamy Milk Chocolate, Vanilla Cream)
  • SlimFast Advanced Energy Shakes (Mocha Cappuccino, Caramel Latte, Rich Chocolate)
  • SlimFast Advanced Nutrition Smoothie Mixes (Creamy Chocolate, Vanilla Cream)
  • SlimFast Keto Shake Mixes (Fudge Brownie Batter, Vanilla Cake Batter, Creamy Coffee Cappuccino)
  • SlimFast Keto Fat Bomb Real Cheddar Cheese Crisp
  • SlimFast Keto Fat Bomb Snack Mixes (Gouda Garlic & Onion, Pepper Jack Fiesta)
  • SlimFast Keto Fat Bomb Strawberry Topped Cheesecake Mini Snack Bar
  • SlimFast Keto Fat Bomb Dark Chocolate Almond Snack Square
  • SlimFast Keto MCT Oil
  • SlimFast Keto Ketone Test Strips
  • SlimFast Diabetic Weight Loss Shake Mixes (Vanilla Milkshake, Chocolate Milkshake)
  • SlimFast Diabetic Weight Loss Meal Bars (Double Chocolate Cookie Dough, Creamy Chocolate Mousse, Peanut Butter Chocolate)
  • SlimFast Diabetic Weight Loss Snacks (Nutty Caramel & Chocolate Clusters, Peanut Butter Cup)
  • SlimFast Keto Fat Bomb White & Dark Chocolate Peppermint Snack Square
  • SlimFast Keto Fat Bomb White Chocolate Pumpkin Spice Snack Cup

does Slimfast work

Does It Work?

Does SlimFast Work?

When followed correctly, SlimFast does work. This structured diet program can deliver the weight loss it promises if you stick to the plan. However, the claim of losing weight without being mindful of the sizes of the portions you eat is not accurate.

In fact, research shows that using portion control can help with weight loss. The Proceedings of the Nutrition Society show that portion control is needed, as portion sizes can be hard to keep straight.

Another study published in the International Journal of Obesity found that utilizing portion control can maintain healthy body weight.

SlimFast involves reducing the number of calories you take so you can’t just go on consuming delicious food without imposing limits.

Benefits & Results

SlimFast Benefits And Results

The SlimFast website features various testimonies from users of the SlimFast diet plan. These include male and female users. They claim to have lost weight in the range of 20 lbs. to 42 lbs. These user testimonials are on SlimFast.com.

The testimonials come with respective full names and brief backgrounds, making the testimonials appear more valid and not mere fabrications.

For those who don’t have health issues but are trying to lose weight, SlimFast should be a compatible weight-loss option.

If you can handle a low-calorie diet, you should be able to follow the SlimFast diet plan.

However, you need to consult your doctor first before committing to the SlimFast plan. This is particularly important for those who are taking medication for their conditions.


Slimfast and weight loss

Weight Loss

Details On SlimFast And Weight Loss

There are no scientific or clinical studies specifically aimed at exploring the effectiveness of adopting a SlimFast only diet plan. However, the makers of SlimFast are citing a long list of research publications made to appear that they support the idea of using the SlimFast diet plan and SlimFast products.

We couldn’t find links to the specific research publications, so we couldn’t ascertain if the research was to prove or disprove the claims of SlimFast. The research appears to support health benefit potentials associated with SlimFast’s different components, not studies intentionally conducted to explore SlimFast products’ effectiveness.

Additionally, most of the research has to do with meal replacements in general, not SlimFast specifically.

According to Nutrition Journala meal replacement diet can help with weight loss. Another study published in the Journal of Obesity found that consuming meal replacement products for a 12 week period could improve body composition.

Research published in Obesity Facts found that weight management using meal replacements could be effective in a primary care setting. Additionally, these kinds of products are more effective when combined with a low-calorie diet, according to Current Nutrition and Food Science


How To Use SlimFast?

SlimFast will enable a low-calorie diet that is easy to follow. Here’s a summary of how this diet plan works.

  • You will have to eat six times per day.
  • The six-times include eating one sensible meal* and two meal replacement** shakes or smoothies.
  • With the six times that you eat per day, you have to consume a total of 800 to 1,500 calories per day, well within the standard definition of a low-calorie diet.
  • Each SlimFast meal replacement shake or smoothie has about 120-130 calories.
  • Each SlimFast snack has 100 calories.
  • The amount of calories in the single “sensible” meal you eat for the day depends on your liking. It could be from 500 to 1000 calories. You have to avoid overeating for this meal.
  • In addition to eating six times a day, you also need to exercise for at least 30 minutes daily.
  • You also have to drink plenty of water (at least eight glasses per day).
  • Once you achieved your target weight, you can switch to having two sensible meals per day and one meal replacement. The 30-minute daily exercise routine should also be maintained even after achieving your desired weight.

A sensible meal is similar to what you have been used to eating before starting the SlimFast plan.

It would help if you did not fill it with comfort food but for something that comes close to one of the meals you consume to achieve a balanced diet. For a guide on what a sensible meal is like, refer to the recipes on SlimFast.com.

SlimFast offers two types of meal replacements: shakes and smoothie mixes. The smoothie mix may go in milk or other beverage. You need to make sure that the milk you use does not contain more than 50 calories. Otherwise, the calorie count for your smoothie replacement will be too high.

SlimFast snacks can be 15-gram protein bars.

The standard SlimFast diet plan is for women (1 meal + 2 meal replacements + three snacks). For men, SlimFast meal replacement and snack intake need to build to 200 calories.

This means that instead of using one scoop of the SlimFast meal replacement, two scoops will be needed (to get 200+ calories).

Instead of eating one energy bar or bar, twice the amount will have to be taken.


The SlimFast Taste

SlimFast is a diet plan that lets you eat delicious food. As such, it’s worth evaluating the taste.

In reality, it would be challenging to come up with a truly objective assessment of the taste of SlimFast products since taste is somewhat subjective. However, based on what users say, some say the meal replacements contain too much sugar.

Some say the coffee products seem to taste like they contain burnt coffee beans. Still, some say that they like the taste of SlimFast products.

Perhaps, a more sensible way to put it is to say that SlimFast tastes just like how a typical diet would taste.

The adjective “delicious” used in SlimFast’s marketing refers to the standard taste anyone would expect in ordinary “delicious” food. That is, sweet food should be sweet, and savory should be savory.

SlimFast recipes, meal replacements, and snacks are not to cut down on sugar, salt, and other typical ingredients that create the flavor everyone loves.

The goal is more on controlling the amount and type of meal eaten. It’s also about choosing the right food to eat.

Side Effects

Potential SlimFast Side Effects

Like most other products, SlimFast is far from perfect. It is not free from side effects. Different people have different reactions to their products and SlimFast recipes.

Some users report having experienced diarrhea after using SlimFast products.

This is important because too much protein consumption does have adverse effects, one of which is diarrhea.

SlimFast promotes low-calorie intake, leading to minor side effects such as constipation, fatigue, and nausea.

It is vital to know that the use of sugar substitutes in the sugar-free versions of SlimFast shakes might cause gas build-up in the stomach and possibly diarrhea in some users.

To avoid the unwanted effects of imposing a low-calorie diet, you should consult a diet or health expert.

Product Warnings

SlimFast Product Warnings

As a low-calorie diet, it’s essential to be aware that the reduced intake of calories may impact blood sugar levels. It’s vital to work with a nutritionist when trying any form of weight loss plan that involves alterations to typical food intake.

Additionally, a SlimFast diet may also interfere with medications. Adjustments may be necessary to avoid health problems or complications.

Low-calorie diets should only be adopted by those who have a BMI of at least 30. It is also not advisable for pregnant women and breastfeeding mothers.

SlimFast.com says that it is possible to drink alcohol while taking the SlimFast diet plan. However, alcohol can reduce this diet plan’s weight loss efficacy, especially if you take too many calories from mixers.


Any SlimFast Lawsuits?

We did not find lawsuits against SlimFast, at least for the new SlimFast under KSF Acquisition Corporation. Likewise, we didn’t find FDA advisories regarding SlimFast meal replacement and snack products.

What we found was an advisory for SlimFast Lipo Fast Burner Capsules Weight Loss for Men. This was one of the products when the brand was still under Unilever.

The FDA advisory warns that SlimFast Lipo Fast Burner is not a registered product and has not undergone the agency’s evaluation. The public is hence advised not to buy it.

Since the SlimFast products available on the SlimFast.com website don’t include the products mentioned in FDA advisories, it’s safe to say that there are no health risks or concerns reported regarding them.

According to Class Action, SlimFast “clinically proven” weight-loss claims based on discontinued, older products.

At present, SlimFast holds a Better Business Bureau (BBB) rating of “C-,” accompanied by three customer reviews resulting in a 1/5 star rating. Over the last three years, 30 complaints have been addressed, with 14 of them resolved in the past 12 months.


SlimFast Alternatives

If you don’t like the taste of SlimFast’s meal replacements or you can’t handle the system it imposes, you can try other weight loss plans. Similar products include:


This is a comprehensive low-calorie diet plan (about 800 calories per day) that also involves meal replacements. However, it’s not something you can do on your own, like SlimFast. The plan entails medical supervision as well as counseling and lifestyle education. You will also have to take vitamin and mineral supplements following the Optifast plan.


If you prefer something that affords greater flexibility, Medifast is something you might want to consider. It lets you choose a plan that involves 4 Medifast meals (meal replacements), two self-prepared meals, and one healthy snack. This plan enables you to consume around 1,300 calories per day.

DIY Shakes And Snacks 

SlimFast is mainly about taking a low-calorie diet by substituting two of your three meals with meal replacement (shakes or smoothies) and eating three snacks (for the day) with 100 calories each.

If you are not fond of the taste of SlimFast’s meal replacements and snacks, you can create your own. You have to make sure you get enough nutrition with them and around 100 calories each.

Recommended ingredients would include lactose-free yogurt, non-fat milk, raw cacao powder, flaxseed, various berries, peanut butter, and unsweetened almond milk.

What Users Are Saying

What Users Are Saying

“I really liked this product. Using these to replace meals is great. I don’t eat breakfast and i don’t eat much during lunch so making a smoothie with these is perfect for me. It taste great.”

“Since they changed from bottles to the cartons the flavor is very off putting, tastes very artificial, well not be buying again.”

“I have used this product for several years now! It has been one of my “tools” in helping to lose 50LBs! I still use today. I mix in blender with fat free milk, ice and add a banana! I love it!”

Bottom Line

The Bottom Line on Slim Fast

So, are you heading out to buy a case of SlimFast Advanced Shakes? Well, we like the longevity of the company, and it’s affordable. Still, we’re hesitant about this one because the research doesn’t directly link it to weight-loss; there are no dedicated peer-reviewed studies and elements in the formula that could disrupt or slow the digestive process of fiber to reduce hunger and slow the onset of appetite are missing. We’re also concerned that beverages are not as effective as solid foods in terms of satiety.

Do you want to trim down a bit? If so, we suggest going with a program backed by clinical research – we tend to err on the side of our scientific research.

Among the best products we’ve seen this year is one called Noom. It features personalized, custom meal plans, expert articles and resources, food tracking, exercise tracking, and more. There’s even human coaching. We’ve found some pretty amazing user reviews and customer service rocks.

Also, the makers of Noom are so confident in their program, they’re offering a free trial offer to Dietspotlight readers.

Learn More About Noom »
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What is SlimFast?

SlimFast is a weight loss program that incorporates meal replacement shakes and bars into its plan, coupled with a sensible, calorie-restricted meal plan and regular exercise. The program aims to facilitate weight loss without inducing hunger and without the need for bland meals.

It provides a range of choices, allowing individuals the flexibility to select foods that suit their taste preferences, going beyond conventional restrictions typically associated with only fruits, vegetables, or dependence on shakes and smoothies.

What are the side effects of drinking SlimFast?

SlimFast side effects may include digestive discomfort, diarrhea, and stomach pain.

What is SlimFast made of?

SlimFast ingredients include fat free milk, water, sugar, cocoa (processed with alkali), gum Arabic, calcium caseinate, cellulose gel, canola oil, potassium phosphate, cellulose gum, soybean lecithin, mono and diglycerides, artificial flavor, carrageenan, maltodextrin, and dextrose.

How much is a can of SlimFast?

SlimFast Original Shake Mixes – 14 Serving (12.83 oz) Canister – $11.99
SlimFast Original Shakes (4 Count Box) – $10.99.

Where to buy SlimFast?

SlimFast products are available in various retail stores like Walmart, CVS, Kmart and Walgreens. You can also find it in some convenience stores, according to SlimFast reviews.

Where can I buy SlimFast?

SlimFast can be purchased using their Official Site.

How many Slimfast shakes a day?

SlimFast recommends incorporating meal replacement shakes into the diet plan twice daily. However, individual caloric needs may vary. The underlying principle is to create a calorie deficit, burning more calories than consumed, for effective weight loss.

Do the SlimFast shakes really work?

According to the claims made by the manufacturer, SlimFast offers a convenient method to meet daily calorie goals. By managing portion sizes and restricting caloric intake, the program asserts that users can achieve weight loss and sustain it over time.

Who came up with SlimFast?

Slimfast was first released by the Thompson Medical Company in 1977.

Does SlimFast come with a guarantee?

SlimFast offers a 90-day money-back 100% Satisfaction Guarantee.

Are SlimFast shakes vegetarian?

SlimFast does offer some vegan products.

How do you make a SlimFast shake?

You can put one scoop of the SlimFast mixture and mix it with at least 8 ounces of whatever fluid of your choosing.

How long does it take to lose weight on SlimFast?

It can take between 8-10 weeks to see significant weight loss with SlimFast.

How much water should you drink on SlimFast?

Users should drink at least 2 liters of water while using SlimFast products.

Is SlimFast keto approved?

SlimFast does have a line of keto approved products.

Is SlimFast good for losing weight?

SlimFast can be a useful tool in losing weight when used properly. It has been shown to help people lose weight and improve health markers when used as part of an overall balanced diet and exercise program. However, it should not be considered a replacement for whole foods, as it lacks many essential nutrients found in fresh fruits and vegetables. Additionally, any weight lost while using SlimFast may not be sustained long term without continued dietary changes.

How long has SlimFast been in practice?

SlimFast has been in practice for over 40 years.

Who owns SlimFast?

KSF Acquisition Corporation, located in West Palm Beach, Florida, USA, is responsible for developing and manufacturing SlimFast products. The company is an investee of Kainos Capital, which acquired the SlimFast brand from Unilever in 2014.

How can I contact SlimFast?

You can call the SlimFast toll-free number at (800) SLIMFAST or (800) 754-6327, or email customercare@slimfast.com.

What are SlimFast's competitors?

SlimFast’s competitors include Shakeology, Optifast, Isagenix, 18 Shake, and 310 Shake.

What are the products offered by SlimFast?

SlimFast offers meal replacement shakes, smoothies, and bars.

What flavors are available for SlimFast Shakes?

SlimFast Shakes are available in 5 flavors: Rich Chocolate Royale, French Vanilla, Strawberries & Cream, Cappuccino Delight, and Creamy Milk Chocolate.

What are the ingredients in SlimFast Shakes?

Each SlimFast Shake contains 10 grams of protein, 5 grams of fiber, 19 grams of sugar, 1 gram of net carbohydrates, and 24 vitamins and minerals.

How many flavors are available for SlimFast Smoothies?

SlimFast Smoothies are available in 2 flavors: Vanilla and Creamy Chocolate.

What are the ingredients in SlimFast Smoothies?

Each serving of SlimFast Smoothies contains 20 grams of protein, 5 grams of fiber, and 24 vitamins and minerals.

What are the available flavors for SlimFast Bars?

SlimFast Bars are available in multiple flavors, including Peanut Butter Chocolate, Creamy Chocolate Mousse, Double Chocolate Cookie Dough, Whipped Triple Chocolate, Chocolate Chip Cookie Dough, Salted Caramel Macadamia Nut, Nutty Caramel and Nougat, and Whipped Peanut Butter Chocolate.

Do SlimFast products work for weight loss?

When followed correctly, the SlimFast program can deliver the weight loss it promises if you stick to the plan. However, the claim of losing weight without being mindful of the sizes of your meals may not be accurate, and long-term results may vary.

58 SlimFast Reviews

  • Carol

    Can it cause constipation?

    • Adrian (Editor)

      Hello Carol. Yes, it can cause constipation. Users have reported experiencing digestive discomfort, diarrhea, and stomach pain. If this concerns you, it might be a good idea to check out a product with less reports like this, check out Dietspotlight Burn. Good luck!

  • melayja

    Will it affect your menstrual cycle?

    • Maribel (Editor)

      Hello Melayja. All users are different and can experience different side effects; please make sure to consult with your physician before taking this product.

  • so awesome
    JenLynn (Verified Purchase)

    I have lost 6lbs in 5 days on slim fast. I started at 288 and today im 282. Im super excited and will continue.

  • Is this good for nursing infants?

    If nursing infants….is it good or bad?

    • Maribel (Editor)

      Hi Mary! Please make sure to consult with your physician before starting a new product.

  • Allison

    I absolutely love Slim Fast! I have tried several things to loose weight and nothing has worked for me. I started slim fast 5 weeks ago and have lost 11 pounds and several inches. It taste great to me. I have a morning shake, morning snack, lunch shake, afternoon snack and eat a regular dinner. I drink 5 bottles of water a day and do not work out. It has been the best thing for me.

  • Harpers B

    I started using the product 2 weeks ago and so far I’m pleased with the taste and product price, I mixed it up with skim milk and slowly enjoyed my shake I also add some good protein to go along with my shake like a boiled egg, fresh fruit or 1/2 cup sugar free jello and so far I’m satisfied nutritionally. I’m glad it has helped me to cut down and out the late night fast food and walk and swim at my local gym, thanks slimfast I appreciate what the shake offers.

    • Glenn (Editor)

      Hi Harpers. Good job on making those changes. If you want to boost those results, you may want to consider adding Dietspotlight Burn. Click above to read about the sample offer.

  • Nancy Davis

    ..I have been using your slim fast shakes for 15 years,but with your new Slimfast Advanced (11.01ozs) I can”t get it shook up after HARD shaking I still have lumps of shake mix left over

    • Anna (Editor)

      Hi Nancy! For detailed product and usage instructions, please refer to the Slimfast official website for more information.

      • Farrah

        I have the same issue after following the products instructions on how to make the shake up I still get really big lumps in the shake this put me off so bad I won’t try it again

  • Your Name

    Slimfast makes me bloat. Equate brand doesnt

  • SlimFast
    Your NamePeter (Verified Purchase)

    Just started with slimfast and it seems to be working, lost 3 lbs in 2 weeks , but it may have had cause of irregularity, do not know if any one else has had the same problemTell us your thoughts about SlimFast.

    • christine

      Tried slim fast in the part. What l found is losingtje natial way.you can easily. Weight more weight by eating less. Excefcisingmore. For now my excerise is mainly walking for an hour. Not leisure. Walk more like brisk. Walking. I lost 3 pounds in a week.. so can too without slimfast diet.

  • I have no problem with the Slim Fast
    John Rupp (Verified Purchase)

    I have no problem with the Slim Fast diet program. I have lost almost 25 lbs. I plan on staying with it for another 5 lbs.I been losing 8-10 lbs per month. Plus have not had any health issues.

    • Alyssa

      How does it work? Do you drunk all day long? I plan on trying it since I just had another baby almost 9 months ago and I wanna get my old body back soon real soon cab you please help I would be greatly appreciative and thankful

      • Alyssa

        I meant drink lol ??

  • I am not sure
    reema (Verified Purchase)

    It is about 5 days now I started taking slim fast shake.i have severe gastric problem. But I am not sure it is because of this product.i wanted to know if I consume for long term, is there any health issues with this product. Thanks

    • Glenn (Editor)

      Hi Reema. Considering you mentioned you experience severe gastric problems, you may want to reach out to a healthcare professional. However, the one we’re keeping our eye on is Dietspotlight Burn. It contains ingredients backed by science and customers aren’t talking about harmful side effects. Click above to read about the sample offer.

  • mix the powder myself
    Connie Belt (Verified Purchase)

    My thoughts are, that i can never find French Vanilla on the shelves at Walmart in Paducah, Ky. I love this product and it is very frustrating not to be able to find it!! I even went on line to purchase it and they were sold out! But last week they had it, but was only going to let me buy 2, when I was wanting 10 cans. I like the powder so I can mix it myself. Thank you for listening. Connie Belt

    • Your Name

      ITell us your thoughts about SlimFast I’m very overweight ,want lose 70 lb so going give it ago I love the coffee latte which sells out fast in UK. Read all comments which find helpful thankyou and good luck to all xx

  • I will quite SlimFast immediately.
    maby (Verified Purchase)

    slim fast contain to much sugar I start to take tons of water after using this product for one month .I will quit it inmmediately.

    • Ana

      I started taking the slim Fast shake Friday and Saturday morning, but had to stop it Saturday, made me feel so bad that i couldn’t stand all day, nausea, headache, been sick all day Saturday and Sunday. Had to stop it.
      Never gonna take it again, If anyone is thinking about having it, think and search before doing it.

  • Disappointed with the plastic bottle
    John Frohock (Verified Purchase)

    I have been a long time user of slim-fast shakes. Today I am quitting. The reason is inconvenience of the new plastic bottles. I use to have my shake on the run. Pop the top and drink it on the drive to work. Now I have to remove the cap, remove the aluminum foil and figure out a place to put them while I drink my shake. The top of the bottle feels funny when drinking from it, and the bottle is to small; falls over in the cars’ cup holder. Looks like the price went up when you shifted to plastic as well. I’m dissapointed.

  • Questions about pricing and packaging
    Judith Rubiel-Perez (Verified Purchase)

    I went to the pharmacy to pick up meds and slimfast and was shocked at what I saw. Now your company is cheating us out of your product. I use to get a 12 pack now its an 8 pack. It use to be 11 ounces, now its 10 ounce. The 6 packs are now 4 packs for the same price. What the heck is going on? I feel your company is starting to screw the consumer. Does your company think that us consumers are stupid, do you think just because you put your product into a plastic bottles that we well be happy? Not me.. If your going to give us the same amount in your plastic bottles then fine and dandy, but don’t take away the volume. I think you need to talk to your marketing dept or your CEO and tell them that the public is not happy. The sales person said she had several complaints since your product hit the shelves. Its bad enough our gas and cost of living is going up, and now the one thing I felt I could afford to help me with my weight problem has gone up. I think you need to do some changes before people start to boycott your product…A concerned consumer.

    • david

      I agree with your comment. I will go to another brand. It is the price. slimfast take note, the price would usually be around $1.00 a can. the price per can has now gone up 40%. I don’t need that headache.

  • it's really expensive

    At 7 or 8 dollars for a 6 pack, it’s really expensive. I found some shakes at Aldi that taste just like them, same vitamins, less calories, and it’s 2.99 for a six pack on sale. Regular price is 4.29.

    • Mae

      What’s the name brand and do they offer a powder you can mix because I am lactose intolerent?

    • cass

      whats the name of this cheaper drink?

    • Jennifer

      I was wondering if Aldi had something like it. I just started the Slimfast diet and really like it, but was wondering if there was a cheaper version. Thank you for letting us know. I will get Aldi’s from now on. It’s my favorite place to grocery shop anyway!

  • it's good product
    Fion (Verified Purchase)

    I do love this program, it’s worked for me, and I continue exercise 3 times a week,also control myself do not eat after 6 pm. avoid from sweet. it’s good product.

  • Slimfast
    lynn (Verified Purchase)

    Slimfast worked for me. i lost 3 lbs in the first week on the 3-2-1 plan & still losing about 2 lbs a week.

    • Shelly

      Hey , you said you lost 3 lbs the first week. I was wondering how much exercising your doing with the diet to get those results, and what exercises are you doing? I wanted to try the SlimFast 3-2-1 Plan, but I wasn’t completely sure if it worked. Thanks.

  • All Slim Fast shakes in a can from 2009 have been recalled.
    Kelly Southard (Verified Purchase)

    Yes, I would throw them away. All Slim Fast shakes in a can from 2009 have been recalled. The powder and slim fast bars are ok. It’s just the cans.

  • My brother said That I should throw this away as it had been recalled. Is this correct?
    Darlene Briggs (Verified Purchase)

    i have 3 six-packs of Slim Fast Diet Drink that I purchased in 2009. My brother said That I should throw this away as it had been recalled. Is this correct? Please advise.

    • Lawrence Smith

      Hello: I read your article on the ingredients in slimfast. For five years I have been using slimfast once a day in the morning. I usually mix a quart bottle in the night and it last about two days. During this five year period I had colitis of the stomach. Only recently did I hear that these problems can be caused by diet. I decided to eliminate foods form my diet to see what could be causing the colitis. I got down to milk and slimfast. When I stopped drinking milk with slimfast my symptoms finally went away. I thought at first it was the lactose, so I went for several days without any milk or slimfast, the symptoms are gone. They I started to see if I could drink milk with no lactose. For several days the symptoms have still been gone and I dont have to take the medicine which cost me $100 a month any longer. I believe the slimfast has been causing me colitis all these years. I am still off the medicine and slimfast and wont use the product any more. I would like to tell other people who may have colitis about this problem. Can you suggest places I can contact? Thanks very much Lawrence Smith

      • Htay RN

        Lawrence, colitis of the stomach?? Colitis refers to the colon and has no referal to the stomach. Slimfast is not intended to be used “for five years” And a quart lasted you two days? That’s two servings you were drinking for one breakfast. With this is mind, I question your ability to mix the proper concentration. Don’t slam the product if you are not follwing direction of proper use.

      • Kelly

        I used slim fast once a day for three days and ended up dehydrated. I drank a ton of water and even ate balanced meals. My stomach didn’t agree with the slimfast and I am not lactose intolerant. Slim fast also is the cause of my immune system crashing. I ended up with bloating and gas. Slimfast was the only thing I did differently. I went to my doctor and she claimed slimfast is not good for anyone. I didn’t read the ingredients until after I took it to my doctor. There is way too much sodium. My doctor said that’s why I was suddenly dehydrated. For me to cut it out of my diet altogether!!! Now that I have, I feel so much better! Also slimfast claims it curves hunger. I call BS. I WAS SO HUNGRY THAT I ATE more than I ever did. I think I ll stick to my regular diet instead of slimfast!!!

    • Glenn (Editor)

      Hi Darlene. Considering the date on the bottles is 2009, they may be out of date. As a replacement, there’s one that we’ve been hearing buzz about and it’s Dietspotlight Burn. It contains clinically-tested ingredients and customers are sharing positive results. Click above to read about the sample offer.

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