Updated: 04/18/2017 - Site operated by Leptigen

Thermo CLA Review - Does This Thermogenic Work?

  • 18 User Comments
  • Rating: 3.8. From 60 votes.
By Summer Banks Mar 16, 2017

Give me just a couple minutes of your time so we can tell you whether or not Thermo CLA is worth your money. We took a detailed look at the ingredient list, possible side effects, customer care and clinical studies. We also felt it necessary to read hundreds of reviews to see what real people were saying. Then, we condensed it all to give you the info you need.

Thermo CLA Readers: Click here to find out why we're giving away samples of our product, Leptigen.

What is Thermo CLA?

First off, Thermo CLA is a thermogenic weight-loss supplement containing Vitamin E, Conjugated Linoleic Acid (CLA), L-Carnitine, Caffeine Anhydrous, Green Tea Leaf Extract, Glycerin, Caramel Color, Titanium Dioxide, and Gelatin. [1] Taking two per day supposedly helps burn fat and possibly speeds up metabolism. [2]

Thermo CLA comes from GNC; but there’s no mention of when the supplement hit the shelves. You can only purchase the product at the local stores or through the official website. We like the natural ingredients and the ease of ordering, but read on…

Ineffectiveness – “Burning Fat?”

The first concern was the ineffectiveness of Thermo CLA ingredients. “We always check up on the reviews online to see what people are saying,” said our Research Editor. “Sometimes we see great reviews, but sometimes, not so much.” [3]

“I started taking these pills a week ago. I haven’t lost any weight, nor have I seen any changes,” said one customer.

“I didn’t find this product to really help with weight-loss or appetite suppression,” said another.

“I have been using this product for over a month now. I work out 4-5 days a week and I have not seen any results or difference,” a third user said.

Thermo CLA Side Effects – “Concerning?”

Based on customer reviews Thermo CLA side effects were concerning. “Caused me to have stomach cramping,” reported dieter.

“Thermo CLA makes me tired. I am a mom of 4 kids I need all the energy I can get…will not purchase again,” said a customer.

My face broke out. Stopped taking them, did not finish taking them,” commented another.

Throughout our research, we’ve found that all it take is something considered concerning, like negative side effects, to put a damper on long-term success. If Thermo CLA causes adverse reactions, this could become problematic.

The Science – “Any Research?”

Besides the above-mentioned discussion on conjugated linoleic acid, we found some other research about CLA on the NIH website. [4] “As far as human consumption of CLA is concerned, a definite conclusion for safety and efficacy has not been reached yet,” says the study. [5] In other words, a lot of rats, and even more mice, have experienced the benefits, but people haven’t had as much success.

Bottom Line – Does Thermo CLA Work?

Are you heading out to buy Thermo CLA? Well, we like that we located some favorable customer comments and the price seems right, but the lack of research has us skeptical about this one. The reports of customers not losing weight and the potential side effects has us concerned.

If you need a product to help you drop those extra pounds, we suggest going with a one containing clinically-tested ingredients that have been shown to work.

Among the best products we’ve seen in 2016 is one called Leptigen. It uses four clinically-tested ingredients in its formula. When combined they can help to boost metabolism and burn fat. The customer reviews online look great, and there hasn’t been any mention of harmful side effects.

Also, the makers of Leptigen are offering a Special Trial Offer, a true sign that the company is confident in their formula.

Previous Thermo CLA Review (Updated September 20, 2013):

What You Should Know ABout Thermo CLA

Thermo CLA is a product of GNC, a company that began in 1935 as a little health food store called Lackzoom that sold yogurt and honey grains. This company currently enjoys the status of the "largest global specialty retailer of nutritional products", according to the GNC company website. Thermo CLA falls under the category of diet support formulas, and claims to boost energy and metabolism through a thermogenic formula that includes conjugated linoleic acid as its base. We will explore the virtues of linoleic acid later in this review.

Thermo CLA sells on the GNC website for $30; a pretty standard price for a diet product of this quality. Thermo CLA comes with a standard GNC money-back guarantee and there is free shipping on orders over a particular amount. We were unable to find customer testimonials on the company website at this time.

List of Ingredients

Ingredients for Thermo CLA include: vitamin E, conjugated linoleic acid, L-carnitine, caffeine anhydrous, green tea leaf extract, Glycerin, Caramel Color, Titanium Dioxide (Natural Mineral Whitener), Gelatin. It is also important to note that this product claims to be sugar and sodium free, with no artificial colors, flavors or preservatives. It is also wheat free and gluten free, making it a good choice for people with some allergies.

Product Features

Conjugated linoleic acid may effectively assist in the reduction of body fat. Unfortunately, one of the side effects to linoleic acid is that it can result in insulin resistance, which may increase the risk for developing diabetes. L-carnitine, found in food like red meat, can help the body dispose of fat more efficiently. However, studies on L-carnitine supplementation have not been conclusive as to its effectiveness. Green tea extract has numerous health benefits, but it is also high in caffeine. Some people can have adverse reactions to caffeine consumption like nervousness, irritability, increased heart rate and elevated blood pressure.

GNC is a company that has a long history and an excellent reputation. The company website provides clear information about their products, which includes a complete ingredient list, benefits, dosing information, and the appropriate precautions for pregnant and nursing women. Clinical studies have shown benefits of some of these ingredients, like linoleic acid, as a fat burning enhancement.

Advantages of Thermo CLA

  • Is suitable for those allergic to wheat and gluten, which is fairly rare.
  • Backed by a well known company with a history of quality.

Disadvantages of Thermo CLA

  • No proven appetite suppressant in the Thermo CLA formula.
  • No customer testimonials available at this time.
  • May cause undesirable side effects in some users.

Thermo CLA Conclusion

Thermo CLA may have some benefits for those seeking an effective weight loss supplement in terms of fat reduction and an increase in the metabolism. However, a few of the ingredients included in this product may have an adverse effect on certain people. Your best bet is to check with your doctor to find out if Thermo CLA is a safe and effective weight loss option for you.

Thermo CLA Questions & Answers:

We looked at hundreds of reviews about Thermo CLA to make this helpful FAQ.

What are the side effects of Thermo CLA?

Side effects of Thermo CLA may include insulin resistance, nervousness, increased blood pressure, elevated heart rate, irritability, and difficulty sleeping.

What are the ingredients in Thermo CLA?

Ingredients in Thermo CLA include conjugated linoleic acid, L-carnitine, caffeine anhydrous, and green tea extract. [1]

Does Thermo CLA work?

Thermo CLA may facilitate weight-loss for some individuals. However, some of the ingredients may cause an adverse reaction in some dieters.

One supplement has dieters very excited. It’s called Leptigen, and it’s made with scientifically tested ingredients known to support weight-loss.

How much does Thermo CLA cost?

Thermo CLA costs $35 for a 30-day supply.

How should I take Thermo CLA?

You should take two Thermo CLA capsules once or twice daily. The company recommends not taking before bedtime.

Can I take Thermo CLA if I have a health condition?

It’s important for women who are pregnant or nursing, individuals under 18, people taking prescription medication, and those with any other health conditions consult their physician prior to taking a product like Thermo CLA and other similar supplements.

What do users like about Thermo CLA?

Users do like that the company that makes Thermo CLA is well respected.

What do users not like about Thermo CLA?

Users don’t like that Thermo CLA doesn’t contain an appetite suppressant, and that it has stimulants. [2]

How do I contact the Thermo CLA customer service department?

You can contact GNC, the makers of Thermo CLA, by phone at 1-877-462-4700 or by mailing letters to GNC 300 Sixth Ave. Pittsburgh, PA 15222.

Who makes Thermo CLA?

Thermo CLA is branded and distributed by GNC.

Does Thermo CLA come with a guarantee?

GNC does offer a 30-day money back guarantee for customers who purchase Thermo CLA.

Do you know of any special deals or discounts on Thermo CLA?

We are not currently aware of any deals or discounts on Thermo CLA. However, customers can request a Special Trial Offer of Leptigen, which is just the cost of shipping and handling. Click here to try it now.

The product helps support a healthy body composition and maintain lean muscle mass.

Thermo CLA Ingredients and Supplement Facts

Serving Size: 2 Softgels
Serving Per Container: 45
Amount per Serving % DV
Conjugated Linoleic Acid CLA 1500 mg *
L-Carnitine 200 mg *
Caffeine Anhydrous 180 mg *
Green Tea Leaf Extract 100 mg *

Other Ingredients: None

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Dietspotlight Author
About the Author:

Summer Banks, a content strategist at Leptigen, 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: 3.8. From 60 votes.
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User Comments

18 Comments on "Thermo CLA Review"


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Can gnc cla be taken along with truvision? Should this be taken with food or water?

Karen (Editor)

Hi Stephanie. It is safe to take with water but if you’re looking to combine product you might want to give a more proven fat burner a look.


Thermo CLA together with the proper exercise and diet boosts metabolism which in turn helps loosing weight. But after three months this boosting effect diminishes which slows down the fat reduction process. Maybe this is because the body gets use to it over time. This is my personal experience and should not be considered as an expert advice.


I find Thermo CLA to be very effective at suppressing my appetite just enough to make a difference. The reason I take it, however, is because I find it SUPER effective at curbing my sugar cravings, which is my biggest issue. I also find that 1 gel cap in the morning gets the job done for me. By the time lunch rolls around I have to remind myself to eat, and will usually have a nice salad without all the garbage on it. That one pill tends to wear off by dinner, which is fine, and it continues to keep me curbed just enough so I eat a healthier, smaller meal and am very satisfied. Around 7p if I am hungry I will have an apple or bowl of raisin brand and I’m god to go! To the person asking if it helps end cellulite – no. NOTHING except healthy and cleaner eating and exercise helps that. Watch how much actual fats you are putting into your body, because those are what help “feed” cellulite. Remember too that some people can never get rid of it completely, but again, you can reduce the appearance of it through exercise and diet. You can read a few good articles about cellulite to learn more.


i really dint have much to say, i do believe that it will work for me cause is for the first time a start using it. again i would like to know if is helping to end the cellulite


can Thermo CLA cause hair lost over your body?

Lisa T

I just found out about this product watching Dr. Oz,only I missed most of the segment. Is 1000 mg twice daily adequate for a 123 lb. woman? I realize the responses are not from professionals. Just looking for info based on personal experiences. How long generally before I should expect to see results? I exercise 3x weekly.


Hey lisa, only my first day on the product so I’d say to work into it slowly. I’m pretty okay with caffeine and usedo to the effects of supplements like this, so I’m starting of with what gel caps. As far as seeing results, most people don’t notice actual change on their body for around a month (give or take a week or 2). Also, taking something like this with a stack of proteins or amino acids can be very effective in helping tone up the muscle while stripping the fat.

Your Name

If your 123 pounds why do you wanna loose weight


when do u see results from using thermo cla when only doing cardio and light weights?

rita seeter

There are user testimonies up now on the gnc website.

Bill Mason

How long can you take this ?


can you take thermo cla if you take cholesterol pills, would it affect the medication.

Kit Telford

I have high blood pressure and take medicines to keep it in control. Will taking the vitamin CLA jeopardize my high blood pressure?

Your Name

Did you ever find out the affects of this pill with controlled high blood pressure? I’m hypertensive and interested in using it


How long have you take CLA to see results?

isabel saavedra

¿Cuantos mg.tiene de cada ingrediente ?me interesa saber especialmente por la cafeína , l- carnitina y´te verde


I just bought thermo CLA, Epiburn Pro, and CLA PM on Easter. I’m shipping out for the Navy in 2 months and I couldn’t lose weight. I was doing everything right, between eating right and exercising so I bought these as a little boost. So to answer your question as to how fast it works… taking those pills in conjunction since Easter to today (04/15/2015) I lost 2% body fat. You should never really go by pounds when you weigh yourself because that’s subject to change for multiple reasons. The only downside from taking the thermogenic CLA is that when I did a lot of cardio my chest/heart felt like it was going to explode from racing so fast. So I would recommend any kind of CLA in conjunction with another weight loss pill (if it’s compatible), just be careful when you exercise.