Evidence Based Research
Our editorial team is made up of expert registered dietitians with extensive, real-world clinical experience who are highly trained in evaluating clinical research.
Read Our Editorial Policy

Thermofight X Review: Does It Work for Weight Loss?

Written by Emily Hirsch, MS, RD

Published on December 28, 2020

Our Expert Rating:


About This Rating
The average rating of this product is calculated based on the evaluation of the following factors:
  • Support for Claims:2.0
  • Ingredient Safety:3.0
  • Value for Price:2.0
  • Brand Transparency:1.0

Thermofight X is a weight loss supplement claiming to boost your metabolism while “melting” fat away. Thermofight X goes as far as to say that using their product will help people lose 31 pounds in 90 days. This is hard to believe as there is no way any product can guarantee a specific amount of weight loss.

Thermofight X Review: Does It Work for Weight Loss?


  • May help increase energy levels
  • Money-back guarantee


  • Lacking in evidence-based ingredients
  • High price point
  • Potential for unpleasant side effects

What Is Thermofight X?

The word thermogenic means “something that produces heat.” As your body burns calories, your temperature increases.

Thermofight X, along with other thermogenic supplements, is designed to increase body temperature in order to theoretically increase the rate at which your body burns calories.

The product is manufactured by the It Works company.

It Works is a multi-level marketing (MLM) company that manufactures and distributes weight loss products across the US, Europe, Canada, and New Zealand.

It Works was founded by Mark Pentecost. Mr. Pentecost was a school-teacher looking for a more lucrative endeavor when he founded the MLM.

Evaluation of Ingredients

The active ingredients in Thermofight X include calcium, vitamin B12, chromium, capsicum, green tea extract, green coffee bean extract, and raspberry ketones.


Calcium is an important mineral that supports bone health, but does it also play a role in weight loss?

Calcium can increase thermogenesis, which may boost metabolism, prompting the body to begin burning fat.

One study suggests that dietary calcium lowers body weight by converting dietary energy to heat rather than storing it as body fat.

However, there is limited research suggesting that calcium supplementation can help with weight reduction.

Vitamin B12

Vitamin B12 is an important nutrient found mainly in high protein foods like fish, shellfish, and eggs.

Vitamin B12 plays many important roles in the body. It converts fat and protein into energy and assists in breaking down carbohydrates.

There may be some evidence to suggest that vitamin B12 deficiency is more common in obese individuals.

One study showed that people with higher levels of vitamin B12 were less likely to be obese.

However, there isn’t strong evidence to suggest that vitamin B12 supplementation will promote weight loss.


Chromium is a nutrient found in many foods and supplements. It plays an important role in the breakdown of carbohydrates, fat, and protein.

Some researchers have suggested that chromium supplementation may help with weight loss by helping to reduce food intake, hunger levels, and fat cravings.

A recent meta-analysis using chromium supplementation for weight loss found promising results.

Participants taking chromium supplements lost significantly more weight than those taking the placebo.

Moreover, the chromium supplementation group also had a significant reduction in BMI and body fat percentage, compared to the placebo group.

As promising as chromium supplementation sounds as a way to promote weight loss, the National Institutes of Health has suggested that supplementing your diet with chromium will have little clinical significance.

This means that taking chromium supplementation while not making other important lifestyle changes (eating healthy and exercising) will not help you lose weight or benefit your health.

Capsicum Fruit Extract

Capsicum is the spicy compound extracted from red pepper or chili pepper. While more research is needed, some scientists suggest that capsicum may be useful for weight loss.

According to researchers, consuming capsaicin extract may help speed up metabolism, reduce fat storage, and decrease appetite.

Green Tea Extract

Green tea extract is a concentrated form of green tea that provides a powerful source of antioxidants.

Green tea has been extensively studied for its weight loss properties. It has been shown to increase thermogenesis, leading to a more efficient metabolism and weight loss.

One study found that overweight women who took a high dose of green tea extract for 12 weeks lost 2.5 pounds (on average), reduced their BMI, and decreased their waist circumference.

It is important to note that the study participants who were receiving the green tea took a daily dose of about 1,350 mg of green tea extract per day.

The green tea blend in Thermofight X only contains 875 mg of green tea extract per day.

Based on this difference, it would be difficult to conclude that Thermofight X would produce the same weight loss results found in the aforementioned study.

Green Coffee Bean Extract

Green bean coffee extract is a compound taken from green or unroasted coffee beans. The active ingredient found in this extract is caffeine.

Caffeine has been shown to be a useful tool in helping to promote weight loss.

A recent review of the scientific literature showed that caffeine consumption may help reduce body weight, BMI, and body fat.

While the research related to caffeine may sound promising, the majority of the research is based on animal studies.

Raspberry Ketone

Raspberry ketone is a chemical extracted from red raspberries. It can also be found in smaller amounts in other various fruits including kiwifruit, peaches, grapes, apples, and other berries.

Raspberry ketones are claimed to help the body burn fat more efficiently in addition to supporting the metabolism.

There are a few small animal studies that may support this claim; however, there is no solid scientific evidence to support raspberry ketone as an effective weight loss supplement.

Verdict on Claimed Benefits

Here is our summary of the available support for the claimed benefits of Thermofight X, based on the available studies:

  • Promotes weight lossSome Support
  • Increases energySome Support
  • Accelerates thermogenesisNo Support
  • Melts body fatNo Support
  • Boosts metabolismNo Support

Dosage, Side Effects, Safety

The recommended dose for Thermofight X is 2 caplets a day. The manufacturer suggests taking the supplement with meals and plenty of water.

The ingredients in Thermofight X are safe and generally tolerated well. However, as with any thermogenic supplement, there are reported side effects.

These side effects may include nausea, abdominal pain, constipation, and headache.

Thermofight X should be avoided by people who are sensitive to caffeine and those with high blood pressure.

If you are pregnant, nursing, or have a medical condition, you should check with your health care provider before using Thermofight X.


You can purchase Thermofight X directly from the It Works website for $67 for a one-month supply.

If you purchase Thermofight X directly from the It Works website, you will need to pay a membership fee of $50 to receive free shipping.

The same bottle of Thermofight X can also be purchased through Amazon for $52.

If you are dissatisfied with ThermoFight X, they do offer a money-back guarantee.

Comparison to Alternatives

Old School Labs Vintage Burn Muscle-Preserving Thermogenic Fat Burner has a similar nutritional profile as Thermofight X.

This alternative is also much less expensive, as a 2-month supply is only $50.

Nobi Nutrition Green Tea Fat Burner is another thermogenic weight loss supplement. This supplement also has a similar nutrition profile offered at a much lower price point.

A month’s supply of Nobi Nutrition Green Tea Fat Burner is $20.89

The Bottom Line

Other than helping with increasing your energy because of its caffeine content, Thermofight X is going to fall short on its many claims.

This so-called “Next Generation Fat Burner” isn’t going to live up to its fat-melting promises. Unfortunately, there are no scientifically proven fat-melting ingredients in Thermofight X.

Moreover, there are no ingredients in the product that have the ability to increase your core body temperature to reap those enticing “thermogenic” effects.

While some of the ingredients in Thermofight X have some evidence to promote weight loss, there are no clinical studies on this specific product.

The synergistic effect of the ingredients is unknown.

Burning fat and boosting your metabolism will come as a result of regular exercise and eating a well-balanced diet, not from a weight loss pill. It’s not quick or sexy, but it works.

Was This Article Helpful?YesNo
Thanks for your feedback!
In a few words, please tell us how this article helped you today.
Please let us know how we can improve this article by selecting your concern below.
Thank You! We appreciate your feedback.
* Please select at least one topic:
Please Note: We cannot provide medical advice. This feedback will help us continue improving your user experience on WellnessVerge.
Please Note: We cannot provide medical advice. This feedback will help us continue improving your user experience on WellnessVerge.
Submit Feedback
Submit Feedback

At WellnessVerge, we only use primary references for our articles, including peer reviewed medical journals or well-respected academic institutions.