Thermogen Review

Editor's Review: 3.5 / 5.0

What You Should Know

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Thermogen is a fat burner that once contained ephedra. When ephedra was pulled from the diet market, it was replaced with other stimulants in most products. In Thermogen, the ephedra is replaced with synephrine, a common ingredient related to ephedra, but without the FDA ban holding it back. Unfortunately, ephedra was proven to boost metabolism and increase weight loss and that cannot be said for synephrine.

List of Ingredients


  • Citrus Aurantium
  • Guarana
  • L-Carnitine
  • Chromium Picolinate

Product Features

The four ingredients in Thermogen are not the best, but they certainly will have some effect on weight. Citrus aurantium and guarana are stimulants. These ingredients will increase heart rate and cause the body to burn more calories. Clinical support for these ingredients is lax compared to the research supporting green tea and caffeine, but guarana is typically standardized for caffeine content so the dieter gains the benefit of caffeine without it being added to the formula.

L-carnitine is clinically proven to increase weight loss, but only if the dieter does not produce, store or properly utilize the L-carnitine taken in from diet and created in the body. If the dieter stores enough L-carnitine for normal body functions, this ingredient will have no effect on weight.

Chromium picolinate is a natural appetite suppressant. It helps control blood glucose response during digestion. Instead of glucose spiking and then falling drastically, causing hunger and cravings, it remains within normal limits and thus hunger is avoided. The effect of chromium is natural, there is no feeling of nausea. If the dieter is accustomed to overeating, chromium may not be strong enough to suppress habitual hunger.

We found Thermogen online for less than $7 a bottle. SciFit no longer makes the original formula, so these bottle are likely outdated.

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  • We found a complete list of ingredients for the original Thermogen.
  • The formula is sound with caffeine and chromium.
  • L-carnitine may help some people lose weight.


  • The product is no longer produced by SciFit.
  • Any bottles of Thermogen available for sale online could be outdated.
  • The dieter has no idea how much caffeine is included in the formula.


Thermogen is not the worst formula on the market, but it is not the best either. The fact that SciFit has replaced Thermogen with Thermogen 2 means the ingredient list was outdated or the testimonials were less positive than the company desired.

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