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

ThermoLean Review - Does This Fat Loss Supplement Work?

  • 8 User Comments
  • Rating: 3.6. From 29 votes.
By Summer Banks Apr 06, 2017

We’re all searching for the right diet product. So we at DietSpotlight conducted a review of ThermoLean, examining the side effects, ingredients, customer service quality and scientific research. Plus we looked at hundreds of comments from all over the web. At last, we summarized the facts and feedback to give you the info you need.

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

What You Need To Know

First off, ThermoLean is marketed as an “advanced weight-loss formula” by Pro-Rx Laboratories. This supplement is supposed to help increase energy levels, “roast” unwanted body fat, boost metabolism and enhance focus. It is taken 20 minutes prior to breakfast, and a second dose can be taken six hours later. The ingredients include caffeine, white willow bark, synephrine hcl, green coffee bean extract, huperzine a, theobromine, l-tyrosine, green tea extract, r-beta-methylphenylethylamine, l-carnitine and raspberry ketones. It is important not to use this formula for more than eight consecutive weeks.

We are not sure when ThermoLean was initially released, but this diet product is suitable for both women and men. There are some positive comments posted online and some of the key ingredients are natural, but read on…

Ingredients – “Are They Safe?

Our first issue is with ThermoLean ingredients. According to our Research Editor, “When you combine synephrine and caffeine, this can increase side effects. Unfortunately, this one contains both, which is definitely concerning.”

One user commented, “Just a warning, if you are sensitive to stimulants, ThermoLean is not a good choice.”

“My doctor instructed me to stop taking this product. I guess it’s not safe,” said another customer.

Adverse Effects – “Another Concern”

From the user feedback we’ve read online, it’s clear that this diet supplement can lead to adverse effects in some users. In fact, one person stated, “I only tried 1 capsule and could feel all the side effects like sleeplessness and heart beat rate.”

“Serious rapid heartbeat and headache from this stuff,” revealed another individual.

Our research shows small things, like jitters, can stop long-term success. This means if ThermoLean does cause reactions, this could be a problem.

The Science – “Any At All?”

Sadly we could not find any clinical studies to support weight-loss promises that come with ThermoLean. At DietSpotlight, we prefer to see some science that backs the product we are researching.

The Bottom Line – Does Thermolean Work?

Now the moment you’ve been waiting for – our bottom line on ThermoLean. Well, we like that this weight-loss supplement uses natural ingredients. But, we have some reservations because of the customer complaints. Also, we’re concerned about parts of the formula. You should also note it is no longer available.

If you’d like to get rid of some extra weight, we suggest you try a product that is easy to purchase online, contains clinically proven ingredients, does not cause any unpleasant adverse effects and is free of dangerous substances.

Among the best products we’ve seen in 2016 is one called Leptigen. This diet formula contains four ingredients, which have been shown in documented clinical studies to help boost metabolism and increase fat loss. We can’t find any discussion of harmful adverse effects and user comments around the internet indicate people are seeing great results.

The makers of Leptigen are so excited about their product they’re offering a Special Trial Offer, which is very reassuring.

Previous ThermoLean Review (Updated September 20, 2012):

What You Should Know

Thermolean is a product that is produced and manufactured by a company that is called Pro-Rx Laboratories. This company is located in Englewood, Colorado, U.S.A. This is a product that is currently being promoted as a weight loss product. In this review we will try to provide you , the potential consumer with enough information for you to decide if this product could possibly be right for you.


The ingredients include Synephrine HCL, Yohimbine HCL, Synthetic Guggulsterones, Caffeine, Bioperine and a proprietary formula, whose ingredients have not been disclosed.

Product Features

A closer look at the ingredients reveals Yohimbine HCL is known to serve a dual purpose. It is actually a known aphrodisiac that can be used in males and females. It has also shown the ability to be able to increase fat loss in male athletes. Synephrine is said to be a safer alternative to the ingredient ephedra. Ephedra is an ingredient that is banned in the United States due to its addictiveness and potentially serious health risks. Synephrine is said to be able to deliver the same results as Ephedra, but without all of the harmful side effects. Although the inclusion of Synephrine is a positive aspect about this supplement, we are not so confident about the use of Synthetic Guggulsterones and Caffeine.

Claims have been made about the product Thermo Lean that it can take on your weight loss issues by helping you to curb your food cravings, increase your energy, and boost your metabolic rate so that you can increase the amount of calories that your body burns in one day. The process in which this happens is called thermogenesis. This may have been where they got the name for the product from.


  • One of the advantages is that this product contains what is considered to be a safer alternative to ephedra.
  • It can curb your appetite.
  • Some studies may show that it can increase your metabolic rate.
  • This product has the capability of improving your energy level.
  • When used in conjunction with diet and exercise it is thought that it can increase the amount of fat that is burned.


  • This product appears to contain a lot of caffeine.
  • It can become quite expensive.
  • Is not recommended to be used for more than 60 days at a time.


It seems as though this may be product that can help you to lose weight by burning fat and calories by using the thermogenesis process. However, it was mentioned on the website that this product should not be used for more than 60 days at a time. It does not say why it should not be used for any longer than this. The problem with this is that if you are looking to just losing a few pounds then this product may be right for you, but if you are looking for a life changing type weight loss then you may need one that can be used for more than 60 days.

ThermoLean Questions & Answers:

We read hundreds of user comments about ThermoLean in order to write this useful FAQ.

What are the side effects of ThermoLean?

Some customers reported ThermoLean side effects, which may include sleeplessness, high heart rate, and headache.

What are the ingredients in ThermoLean?

ThermoLean ingredients include caffeine anhydrous, green coffee bean extract, garcinia cambogia fruit extract, yerba mate leaf extract, raspberry ketones, yohimbe bark extract, white kidney bean extract, cayenne pepper extract, green tea leaf extract, and guarana seed extract.

Does ThermoLean work?

ThermoLean offers a number of strong weight-loss ingredients, including caffeine, green tea and cayenne. There are also some “fads” in there like raspberry ketones and garcinia cambogia.

If you are looking for a supplement with clinically tested ingredients, you may want to look at Leptigen.

How much does ThermoLean cost?

ThermoLean costs $59.99 for a bottle of 60 capsules.

How should I take ThermoLean?

If is suggested that you take one capsule of ThermoLean in the morning and another in the evening, each with eight ounces of water.

Can I take ThermoLean if I have a health condition?

Before taking any weight-loss supplement, you should consult your physician, especially if you are pregnant, nursing, under 18 years old, or suffering from any health condition.

What do users like about ThermoLean?

The customers of ThermoLean like that both men and women can take the supplement.

What do users NOT like about ThermoLean?

ThermoLean users do not like the price and that there are reports of side effects.

How do I contact the ThermoLean customer service department?

ThermoLean does not have an official website with information for their customer service department.

How much am I supposed to lose while using ThermoLean?

Although results may vary, ThermoLean claims to help you lose 1-2 pounds per week.

Does ThermoLean contain gluten?

ThermoLean is a gluten-free product.

Does ThermoLean come with a guarantee?

ThermoLean does not come with a guarantee.

Do you know of any special deals or discounts on ThermoLean?

ThermoLean does not offer any special deals or discounts. However, if you are looking for an awesome deal, you may want to check out Leptigen. Right now, they are offering a Special Trial Offer for all customers. Click here to try it out.

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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: 3.6. From 29 votes.
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User Comments (8)


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Most amazing fat burner


I just started using it and i don’t feel any side effects. I am eating less.


It was good to lose weight only took one for the first while and when I moved onto two I had increased heartrate dizziness vomiting and sleeplessness.


I cant say much about it I just started I want to know how would you see if they are working and what are the side effects. Please help

S Giardelli

I used Thermolean in the 90’s and it worked amazingly! After I had my two kids I would used it and it really curbed my appetite and I lost weight. No side effects what so ever, just a little gittery from the caffiene but well worth it! I am looking into taking it again.


Vivek, its people like you that shouldn’t take supplements for anything. 1 pill and you made your mind feel some of those symptoms, and yeas sleeplessness and “heart beat rate” (im assuming a raised heart rate) is going to happen with caffeine. As far as the chest pain and feeling of vomiting, that’s all on you with just one pill.

Jazz 22

I wish that ThermoLean and other products like it with caffeine, would just leave out the caffeine, so more people could take it. They could just recommend that you take it with a caffeinated drink. How hard would that be?


Thermolean is the worst product one can use for weight loss I only tried 1 capsule of thermolean and could feel all the side effects like sleeplessness,heart beat rate , feeling of vomitting , chest pain thermolean will show side effects 110% sooner or later