Updated: 01/18/2018

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, Burn HD.

What is Prolessa Duo?

First off, Prolessa Duo is an appetite suppressant that has:

  • Conjugated Linoleic Acid [1] [2]
  • Palm Oil
  • 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…

Products Similar to Prolessa Duo

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CLA 500read
Burn HD (Sample offer)read

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]

What Users Are Saying

“This stuff is so awesome. I have lost 15 lbs. using this and I love it. I will be ordering more soon.”

“Wish taste was different but it works.”

“It’s ok. Does not mix well with any fluids.”

Also: read our Burn HD 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 Burn HD. 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 Burn HD are confident in the supplement so they’re offering a 2-Week Sample, nice bonus.

Learn More About Burn HD »
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Prolessa Duo

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 , oat oil, glucose syrup, sodium caseinate, silicon dioxide, ascorbyl palmitate, sodium phosphate, potassium phosphate, soy lecithin, natural mixed tocopherols and natural flavor.

How do I know if Prolessa Duo is right for me?

Choosing the right product is the #1 question asked by DietSpotlight readers. We recommend trying any product before buying it and know that finding a product with a sample offer is near impossible - so we created our own product, Burn HD, with scientifically backed ingredients.

Click here to get your sample of our powerful fat burner today.

What is the active ingredient in Prolessa Duo?

The active ingredient in Prolessa Duo is safflower oil. 

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.

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.

How much Prolessa Duo do you take?

Add 1 scoop of Prolessa® one to your Formula 1 shake after you make it. After adding the scoop of Prolessa® you will want to mix your shake for and extra 10- 15 seconds. Do this once a day. Strategically plan to do this when you might be tempted to snack or overeat.

What is in Herbalife Prolessa?

Prolessa is a dual-action weight-management solution that will help to control your hunger and burn more fat. It comes in 11.2ounce containers.

Prolessa Duo Ingredients

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 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]


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.
Summer Banks Dietspotlight Author
About the Author:

Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

37 Prolessa Duo Reviews

  •  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.

  • Nykki

    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?

    • Alexa

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

    • Richard (Editor)

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

  • Does it cause any side effects?

    I need to know there are any sidefects?

    • Candace (Editor)

      Some users report experiencing constipation, Danny. You may want to consider using another weight loss supplement, like Dietspotlight Burn.

  • Rosie

    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.

  • shaina

    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

    • Adrian (Editor)

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

    • 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. 🙂

  • 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.

  • seanna

    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.

    • Jasmine

      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.

      • Rosie

        Are you also using a formula 1 product or using your own protein powder?

  • Jodi

    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!

  • Thea

    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.

    • Areli

      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

    • Alexa

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

    • Montana (Editor)

      Hey Mary. We’re sorry to hear didn’t have success with Prolessa Duo. You may want to check out another weight loss supplement, like Dietspotlight Burn.

  • 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.

  • Tati

    Hello! I normally take the Formula 1 + Herbalife’s personalized protein powder twice a day, but I am excited to try Prolessa. I see that they recommend adding 1 scoop of prolessa to a shake once a day. Does this mean that I do not add any of the personalized protein powder when I add Prolessa? And would my 2nd shake of the day only have the personalized powder (no Prolessa)? Thanks everyone! 🙂

  • Aminata

    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!

    • 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

      • Amanda

        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.

        • Lesa

          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’

    • Suni

      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.

  • 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?