Updated: 07/18/2017 - Site sponsored by Dietspotlight Burn
By Summer Banks Jun 21, 2017

Diet products either work or they don’t. Period. Let’s find out which one Prolessa Duo is. We concentrated on ingredients, side effects, scientific support and customer service. Additionally, we paid close attention to hundreds of consumer comments and reviews. We then refined and condensed to give you the info you need.

Prolessa Duo Readers: Click here to find out why we're giving away samples of our product, Dietspotlight Burn.

What is Prolessa Duo?

First off, Prolessa Duo is an appetite suppressant that has conjugated linoleic acid, [1] [2] palm oil and minerals. You can mix the supplement with a shake or consume as is once per day. The product supposedly assists with weight-loss. It’s easy to mix and you can drink it on the go, two benefits. [3]

There’s no mention as to when Prolessa Duo hit the market, but the parent company, Herbalife, was founded in 1980. [4] You can purchase the product on the official website and through third-party retailers. We do like the longevity of the business and that we found a few positive customer comments, but read on…

Prolessa Duo Taste – “Not Flavorful?”

The first concern we had with Prolessa Duo was taste. “When you add a powdered appetite suppressant to a shake, you don’t want it to alter the flavor,” said our Research Editor. “If it just isn’t any good, dieters will more than likely stop using it.”

“This stuff taste like paint! I literally felt like I was drinking paint each time I used it,” said a consumer

“It has a medicine taste,” reported one customer.

We found that some customers had a different take on the taste of Prolessa Duo ingredients.

I have always enjoyed Herbalife products. I find their price to be a bit high, but the taste makes it worthwhile,” commented a dieter.

FDA Advisories – “Concerning?”

The Food and Drug Administration contacted Herbalife in December of 2014 because the company used a promotional video that implied the FDA supported products sold by the business. All relevant information has since been removed. [5]

Ineffectiveness – “It Doesn’t Work”

According to numerous customer comments, when dieters  followed the recommendations for taking Prolessa Duo they didn’t see results. “I was on the program for 3 weeks & lost absolutely nothing,” commented a consumer. [6]

“Didn’t notice any difference and fat percentage did not decrease,” said a customer.

“Did not lose anything and I am in the military so I’m constantly moving around. I actually gained a pound,” reports a user. [7]

There were some users that reported changes while using Prolessa Duo. “I notice myself resisting the urge of snacking in-between meals and it feels awesome,” stated a dieter.

“I think it really works with a good nutrition plan,” said another.

Is There Any Real Science?

While the official Prolessa Duo website states the ingredients are “clinically tested,” we couldn’t locate published scientific research supporting the suggestion you’ll lose weight. At DietSpotlight, finding studies backing claims is critical. If there’s no science, why take a chance? [8]

Also: read our Dietspotlight Burn Weight-Loss Kit review »Prolessa Duo Ingredients

The Bottom Line – Does Prolessa Duo Work?

We’ve looked up and down this one – so, what do we think? After thoughtful consideration regarding Prolessa Duo, we’ve come to a conclusion. There are some positives like a few favorable comments and the longevity of the company, but we have reservations about it because of the lack of published clinical research supporting the weight-loss claims. Plus, we have concerns about the FDA judgments and the MLM opportunity, making purchasing smaller quantities more difficult.

If you’d like to rock your best body, we recommend going with a supplement containing ingredients backed by published clinical research that doesn’t have to taste good to work.

Among the best products we’ve seen this year is one called Dietspotlight Burn. The formula contains a four-ingredient proprietary blend, shown in published scientific research to stimulate fat loss and ignite metabolism. There’s no talk of negative side effects and reviews on the web report customers are seeing excellent results.

Additionally, the makers of Dietspotlight Burn are confident in the supplement so they’re offering a Special Trial Offer, nice bonus.

Previous Prolessa Duo Review (Updated July 14, 2014):

What You Should Know about Prolessa Duo

Prolessa Duo is a complimentary supplement that can be added to protein shakes or yogurt to improve weight loss success, according to the product description. The product is available as part of the Herbalife line, which means there is a natural push to purchase other Herbalife supplements to take in conjunction with Prolessa Duo. Herbalife, luckily, has a fair BBB rating. Prolessa Duo used to be available in pill form, but the company recently added the powdered product to the lineup. Based on the ingredient list for the supplement, there is no indication the dieter will lose weight with Prolessa Duo. Aside from the CLA in this product, we'd like to point out Slendertoxtea is a dietary supplement instilled with green tea, yerba mate and senna that helps the body detox and flush toxins.

List of Prolessa Duo Ingredients

  • Safflower Oil Derived CLA
  • Palm Oil
  • Oat Oil
  • Glucose Syrup
  • Sodium Caseinate
  • Silicon Dioxide
  • Ascorbyl Palmitate
  • Sodium Phosphate
  • Potassium Phosphate
  • Soy Lecithin
  • Natural Mixed Tocopherols
  • Natural Flavor

Product Features

CLA or conjugated linoleic acid has been around for more than a decade. One of the first popular CLA supplements with Tonalin, which claimed the dieter could take CLA without changing their current diet to lose weight. CLA is not clinically proven to boost or promote weight loss, but there are a few studies that suggest a small amount of fat loss occurs when taking CLA like the kind found in Prolessa Duo. There are also studies that claim CLA intake by obese individuals can have negative side effects like increased insulin resistance and increased risk of diabetes. On the official site more detail is given. Palm oil, the next ingredient in Prolessa Duo, is not considered a healthy fat. The oil is high in saturated fat and it may be oxidized, on some level, before being added to products and supplements. The unhealthy nature of palm oil is supported by the fact that it is a common ingredient in processed foods. Oat oil doesn’t appear to be a significant source of anything other than fat and saturated fat. Prolessa Duo also adds glucose syrup – a form of sugar, and various electrolytes to the formula. These have no impact on weight loss.

Advantages of Prolessa Duo

  • Ingredients are listed on the Herbalife website.

Disadvantages of Prolessa Duo

  • There don’t appear to be any weight ingredients in the formula.
  • Palm oil and oat oil are sources of saturated fats.


Prolessa Duo is a powdered supplement that has no effect on weight loss. The supplement will add 70 calories to your normal protein shake or yogurt, but it will not increase metabolism or decrease hunger. This is briefly touched upon on their wikipedia page. The product label claims it will reduce hunger and decrease body fat, but Herbalife does not support these claims with clinical evidence and there are no testimonials for the supplement.

Prolessa Duo is a powdered supplement from Herbalife. The formula claims to help with "hunger control" and "fat reduction." The active ingredient has been clinically tested with some positive results. However, there's no strong evidence that this product will promote lasting weight-loss.

Prolessa Duo Ingredients and Supplement Facts

Serving Size: 1 Scoop
Serving Per Container: 7
Amount per Serving% DV
Conjugated Linoleic Acid**
Palm Oil**
Oat Oil**
Glucose Syrup**

Other Ingredients: Silicon dioxide, ascorbyl palmitate, sodium phosphate, potassium phosphate, soy lecithin, natural mixed tocopherols, natural flavor

We dug deep into the Prolessa Duo ingredients to give you the details you need.

Conjugated Linoleic Acid

Conjugated linoleic acid is a group of chemicals found primarily in beef and dairy products.

What is it Supposed to Do?

There has been some research linking them to anti-cancer properties and weight loss.

Clinical Research

According to a study published in Lipids, “CLA supplementation in women produced a transient decrease in leptin levels but did not alter appetite.” [1]

Palm Oil

Palm oil is made from the fruit of a palm tree.

What is it Supposed to Do?

It is believed to combat high cholesterol and high blood pressure. It has also been used for increasing metabolism and to promote weight loss.

Clinical Research

According to a study published in The American Journal of Clinical Nutrition, there is “Some evidence to suggest that the minor components of palm oil might have useful biological effects.” [2]

Oat Oil

Oat oil is derived from oats, a type of cereal grain.

What is it Supposed to Do?

There are many health benefits associated with oat due to their high content of essential nutrients and vitamins.

Clinical Research

According to a study published in Food and Nutrition, “This study suggests that intake of fractionated oat oil prolong lipid digestion affect postprandial plasma lipids and have an effect on satiety.”


One that’s caught our attention is one called Dietspotlight Burn. The supplement contains clinically-tested ingredients and has been shown to work. Click above to learn more.

Prolessa Duo Side Effects:

Nowadays, weight-loss supplements play a key role in a lot of lives. This doesn’t mean the natural choice doesn’t have a possibility for a negative reaction. With every formula there is a chance for an adverse effect, and while Prolessa Duo side effects are relatively rare, it doesn’t mean they don’t happen to some people.


Migraines are a painful type of headache that is usually accompanied by nausea and vomiting. Another characteristic of a migraine is abnormal sensitivity to light. [1]

What causes migraines?

Migraines are believed to be the outcome of abnormal brain activity that temporarily affects nerve signals, blood vessels, and chemicals in the brain. Migraine triggers can be emotional or physical in nature. Stress, depression, or poor diet can also result in this condition.


Bloating is an uncomfortable condition in which the abdomen feels distended, tight and overstuffed. Bloating may cause nausea and sweating. It is fairly common in adults and children.

What causes bloating?

Bloating is commonly caused by swallowing air into the digestive system. This swallowed air can make the stomach feel full and extended. Other factors may include constipation, gas, fiber intake, irritable bowel syndrome (IBS) and even heartburn. [2]

Stomach Pains

Stomach pains (abdominal pains) can be a sharp or burning sensation in the abdomen region of the body between the pelvic area and the chest. These pains may cause sweating, nausea, and vomiting depending on the cause of the issue.

What causes stomach pains?

Constipation, stomach flu, or another infection can cause stomach pain. Peptic ulcers are also a known factor, along with any inflammation or infection of the organs. Appendicitis and kidney stones are good examples of more serious causes for stomach pain.


Constipation is the hardening of bowel movements and the inability or difficulty passing stool. More severe cases of constipation are called obstipation, which is the failure to pass stool or gas, or fecal impaction, which could lead to bowel obstruction.

What causes constipation?

Lack of fiber in the diet is among the most common causes of constipation. Other factors include physical activity or consumption of dairy products. Constipation is the result of lack of fluid in the digestive track, so dehydration is a common issue.

Prolessa Duo side effects are few and far between, although some users have noted a negative experience such as constipation, stomach pains, and migraines, among others. In an effort to safeguard yourself from any possible negative reactions, it’s always wise to consult a physician before taking any supplement. Especially if you are pregnant or nursing, under the age of 18, are taking prescription medications, or have a medical condition of any kind.



Prolessa Duo is a weight-loss supplement with side effects reported by customers who’ve used the formula. However, we’d also like to share that these reactions are few and far between.


“It also gave me stomach issues that I don’t have now that I’m off the product.”    Nichole


“Taste like paint very clumpy and hurt my stomach.”    Ari


“It’s supposed to make you feel full longer and apparently it does that by making you super bloated.”    Sam


“It might work but I wouldn’t know it gives me migraines.”    Karrie


“I have been taking Prolessa for one week and lost 4 pounds but when i woke up this morning i have indents on both sides of my waste that actually look like bruises i am concerned.”    Rhonda


“I felt hyper at night and could not fall asleep last night..”    Ann Marie


“I have been taking for two weeks and the only thing this product did so far is give me gas.”    Shirley


“It left my shaker bottle smelling like mold and it even started to mold a little in the bottle of the shaker even if I washed it out right away.”    Ruth


“It made me more hungry. I poured it into my shake I rather just drink the herballife shake. Too expensive. For it do to nothing.”    Lazzette


“We would also have terrible gas all day and night, plus sharp stomach pains.”    Kristin



Supplements causing adverse reactions are rare, that’s why one that’s caught our eye is called Dietspotlight Burn. There’s no mention of harmful side effects and customer comments are postive. Want to learn more about it? Click above.

Prolessa Duo Questions & Answers:

We sorted through hundreds of customer reviews about Prolessa Duo to create this helpful FAQ.

What are the side effects of Prolessa?

Prolessa is a pen name for Prolessa Duo. According to customer comments, Prolessa Duo side effects may include constipation, upset stomach, nausea, headache and sleeplessness.

What is in Prolessa Duo?

Prolessa Duo ingredents include safflower oil derived cla, palm oil [1], oat oil, glucose syrup, sodium caseinate, silicon dioxide, ascorbyl palmitate, sodium phosphate, potassium phosphate, soy lecithin, natural mixed tocopherols and natural flavor.

What is the active ingredient in Prolessa Duo?

The active ingredient in Prolessa Duo is safflower oil. [2]

Does Prolessa Duo Work?

Prolessa Duo has helped some users be successful with weight-loss. However, there are no clinical studies to support this product as a viable solution. It includes ingredients that are sources of saturated fats, added sugar, and nothing that is known to help boost the metabolism or suppress the appetite.

How much does a bottle of Prolessa cost?

A bottle of Prolessa Duo costs $28.05 for the seven day program and $106.85 for the 30-day plan.

How do you take Prolessa?

You should take one scoop of Prolessa Duo, mix with your Formula One shake and drink once per day.


What do users like about Prolessa Duo?

Many users liked how easy it was to mix Prolessa and how it was designed to enhance your diet, rather than replace a meal.

What do users NOT like about Prolessa Duo?

Many users complained about the taste of Prolessa Duo.

Is Prolessa Duo safe for diabetics?

While there are no studies that show using CLA can cause negative side effects such as insulin resistance and increased risk of diabetes, it’s best to contact a healthcare professional prior to using this supplement.

Do I have to have a blender to use Prolessa?

Using a blender is not necessary to blend the Prolessa Duo, although it may improve the quality.

Who makes Prolessa Duo?

The makers of Prolessa Duo is Herbalife.


Are there deals or discounts on Prolessa Duo?

Yes, there are special deals and discounts on Prolessa Duo, but you may need to reach out to an Herbalife distributor. However, our readers have been going wild over the past few months taking advantage of the Special Trial Offer offered by Dietspotlight Burn. Click above to learn more about it.

Prolessa Duo Scientific Abstracts:

Conjugated Linoleic Acid

Results from studies have shown that conjugated linoleic acid (CLA) could cause a small reduction of body fat in humans, specifically in the abdomen, however there is no effect on body mass index or body weight. There aren’t any simultaneous improvements in glucose or lipid metabolism found in the research. The trans-10, cis-12 CLA isomer had surprisingly triggered substantial peripheral insulin sensitivity impairment as well as in blood glucose and serum lipid concentrations. In conclusion, CLA significantly increased lipid peroxidation. The metabolic actions of conjugated linoleic acid in humans seem complex, thus further trials and studies are needed. [1]

Analysis of the dosages and their effects had suggested that loss of fat when compared to placebo was −0.024 kg · g CLA−1 · week−1 (P = 0.03). Following a change in the median dose 3.2 g CLA/d, conjugated linoleic acid was found to be effective and created a decrease in fat mass for the CLA group (0.05 ± 0.05 kg/week; P < 0.001) as well as that same group when compared to placebo (0.09 ± 0.08 kg/week; P < 0.001). In conclusion, at a dose of 3.2 g/d, conjugated linoleic acid triggered modest body fat loss in humans. [2]

Palm Oil

Aside from palmitic acid, palm oil is made up of linoleic and oleic acids which are both polyunsaturated and monounsaturated. Palm oil is made up of vitamins E and A, boasting powerful antioxidant effects. Palm oil has shown, on a scientific level, to protect the heart and blood vessels from ischemic injuries and plaques. When the oil is ingested as a dietary fat (in conjunction with a healthy diet) does not possess incremental risk for cardiovascular disease. Very little (if any) benefits are obtained when replacing palm oil with other oils that are abundant in mono or polyunsaturated fatty acids. [3]

Oat Oil

When ingesting 35 and 14 g of lipids from fractionated oat oil, there had been substantial elevation in plasma levels of CCK, GLP-1, GLP-2, and PYY postprandially. This had concurred with an elongated increase of triglycerides and large cholesterol-containing particles. The satiety in women had risen 7 hours following consumption of 35 g lipids from fractionated oat oil without any alterations in food intake. Results of have also displayed that consumption of 14 g lipids from fractionated oat oil in the morning (with breakfast) had significantly decreased every intake throughout the duration of the day. In conclusion, the study has indicated that fractionated oat oil intake prolongs lipid digestion, has an effect on postprandial plasma lipds and has an effect on satiety. The traits of fractionated oat oil on GLP-2 suggest that consumption of fractionated oat oil improves gut health as well. [4]

Learn More About Dietspotlight Burn »
Summer Banks Dietspotlight Author
About the Author:

Summer Banks, a content strategist at Dietspotlight, has researched over 5000 products in the past 10 years. She has years of nursing training, experience as a manager responsible for 15 supplement brands, and completed coursework on Food and Nutrition from Stanford University. full bio.

Rating: 3.7. From 248 votes.
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Leave a comment or review

Bella Khodorkovsky (Verified User)

I have a big stomach, and I tried everything, and nothing worked for me. I bought some Prolesa Duo and placed it in my shake, I finally start seeing my stomach dissapearing, I LOVE THIS PRODUCT.


I have some prolessa in a ziploc bag from when I moved and haven’t used it since last summer is it safe to still use it??

Richard (Editor)

While there are no warnings about using expired products, you can always contact your doctor for assistance.

Barbara Konstantinidis

Can you mix it in your own protein shake or do you have to use formula 1?

Richard (Editor)

Hi Barbara. You can mix it with your own protein powder.


It is recommended to use it with the formula, Herbalife also has protien powders.

  Does it cause any side effects?

I need to know there are any sidefects?

Candace (Editor)

Some users report experiencing constipation, Danny.


I would like to know if I can take it at nite by itself without the shake before I go to bed?

Richard (Editor)

Hi Rosie. You can take Prolessa Duo by itself.


i am on a budget, and i see on the Prolessa it shows to add to Formula 1, i already purchased the Formula 1 (meal replacement) but i really can’t afford at this time to purchase the Prolessa, will i still have the same effects? or is there no point in doing the Formula 1 without the Prolessa

Brenda Stamper

Yes, you can just stick to the Formula 1 for now. The shakes taste good and are a great meal replacement. The Prolessa Duo is an additional product that CAN be added but does not need to be. 😀 Hope this helps. 🙂

Victoria (Editor)

Hello. Herbalife products claim to work better when taken together with other Herbalife products.

Your NameFernander

I’ve heard all the different reports, but that don’t move me, I’m trying it for myself, so that I can have my own testimony. I’m starting the product Today. I”M watching what I eat & exercise so I can get result. My cousin tried it and lost 5lbs in a week. I want my own result.


some people think you can still eat whatever and that it should still work but it also matters on what you are eating. you cant eat junk then take a supplement and think it will magically make you loose weight and inches you have to watch calorie intake and what you eat along with exercise to make this work.


good point!! Seanna
I Have been taking Prolessa Duo for 3 months now an you will not believe my amazing results, not only drop from size 9/11 to a size 5/6, Wonderful to me!! I have not experience any side effects, I follow a not to strict diet where I have cheating days, I do exercises 20-40 minutes a day 4 days a week.


I love Prolessa Duo. I’ve been taking it for 2 months and have noticed a big difference. I hit a plateau in my weight loss and needed to change things up. I’ve lost a total of 50 pounds, but the last 10 have come off in the last couple months….was stuck at 160 ish for a couple years while maintaining great eating and workout practices…now at 150. Don’t knock it until you try it, and you must use it in conjunction with and healthy lifestyle and eating program. There are NO quick fixes…a pound a week is great!


Hear hear. Anything more than a pound or two at the very most a week isn’t healthy. Look how long we take to pack ’em on, right?

Mary Smith

Prolessa Duo does not work at all. I’m very upset that I wasted my money!!! I definitely don’t recommend it to anyone trying to lose weight.


Hi Mary! Sorry to hear that it did not work for you! May I ask what were your eating habits like?


I lost 30 pounds with prollesa shake and protein one the most important thing in every program your try change eating habits and that makes a huge difference nothing works if you don’t take the first step

Will Saunders

When I use Prolessa along with the Formula 1 Shake, not only do I see great results, but the flavor is also good too. When I take Prolessa alone, it doesn’t work and it doesn’t taste very well. I mix it in my mini blender. I usually add about 3-5 blueberries or raspberries along with a couple of packets of Splenda or Stevia.


I really like this prolessa duo it taste so yummi even though the bottle is so small and it’s expensive but I like it

  Have bruise on both sides of waste,is this normal ?
Rhonda (Verified User)

I have been taking Prolessa for one week and lost 4 pounds but when i woke up this morning i have indents on both sides of my waste that actually look like bruises i am concerned. Has anyone else experienced this?

  Plan to try it again !
Shunda (Verified User)

I did the prolessa duo 30 challenge along with exercise and a small change in diet. My visceral fat dropped one point and body fat dropped .8 I plan to try it again with a diet modification.

  Very important I need to know
Ann marie (Verified User)

I took prolessa duo yesterday morning for the 1st time and had no appetite all day and felt hyper at night and could not fall asleep last night. I have a heart problem and can not use any ripe of stimulant are there any in this weather natural or not ? Very important I need to know

Devon (Editor)

This product is an appetite which don’t usually contain stimulants. Prolessa Duo ingredents include Safflower Oil Derived CLA, Palm Oil, Oat Oil, Glucose Syrup, Sodium Caseinate, Silicon Dioxide, Ascorbyl Palmitate, Sodium Phosphate, Potassium Phosphate, Soy Lecithin, Natural Mixed Tocopherols, and Natural Flavor.

  The Prolessa Duo is excellent
Christopher Betts (Verified User)

Been taking Herbalife for little over a year now… I lost a total of 85 lbs… The Prolessa Duo is excellent… My first 30 trial I pulled of a total of 15 inches in a month… I’ve taken it 3 more times after and gotten the same results… I guess some people it works different with… Maybe a lot to do with your metabolism… I know I do the business side of herbalife and I know herbalife isn’t for everbody… Some people it works well with and some people it don’t…But I wouldn’t knock Prolessa Duo until you give it a try…

  I wasted my money
shirley (Verified User)

I have been taking for two weeks and the only thing this product did so far is give me gas. I work out five days a week. Cardio, and light weight training and abdominal excercises. Not change in weight. Mad that I wasted my money unit. An Herbal life consult sold it to me and said it woot ks wonders! That’s a crock of bull! I don’t recommend it!


How is your diet? Supplement or not, if you do not eat a clean diet (unless you are naturally skinny) you will not see abs or definition. I am a cpt . Is a common mistake people make thinking the gym alone will give them the result . No clean eating no abs. Supplements are to give you an edge, not the solution.

LeeYour Name

How that works I’ve tried it three times I’ve done it the way I’m supposed to I’ve done it in shots I don’t feel no different in fact I feel hungry and I taken in conjunction with the shakes and the supplements so to me it doesn’t do anything it’s too expensive to have no results if I have total control cell U loss and thermabond should be ok I took it for the last week and a half I barely lost a pound and a half


ummm, don’t get me wrong but isn’t that pretty good weight loss?? A pound and a half in a week and a half? That’s a pound a week! And that’s a healthy way to lose weight. Herbalife isn’t a get thin quick fix, it takes time and dedication. The products are designed to give you the best nutrients and natural ingredient. So your weight loss is good. Shouldn’t expect much more in the first week. I started prolessa and noticed it helped my lose the little pooch in front. As far as taste goes, I mix it in with a shake and can’t tell its there.


How long did it take to lose your pooch? I started herbal life in February & saw tremendous change then I stopped. I recently started again & just started the shakes with prolessa tonight. I’m just trying to lose my pooch lol I always workout’

  It made my muscles smaller
Gilbert Deniz (Verified User)

I have been taking prolessa for around 2 weeks and i work out daily but i noticed that in made my muscles get smaller… is prolessa responsible for that?