ThermoLean from Pro-Rx is a fat burning diet pill, which, according to their website,
· “Boosts your metabolic rate so you burn more calories
· Increases your energy
· No jitters – just a warming feeling as your metabolism is on fire
· And it helps to control/reduce your appetite!”

This ThermoLean review will help you separate fact from fiction and determine if ThermoLean diet pills are right for you.

What are the ingredients in ThermoLean diet pills?

Supplement Facts:
Serving Size: 2 Capsules
Servings Per Container: 60
Amount Per Serving:
Synephrine HCL 25mg
Synthetic 99% Guggulsterones 25mg
Yohimbe 5mg
Caffeine 250mg
Bioperine 5mg
Proprietary Formula 210mg

Is Synephrine effective? One study performed in December of 2007 looked at the lipolysis (fat loss) effects of Satsuma mandarin orange (Citrus unshu Mark) peel on the fat cells of rats (I know, it’s always rats). A high concentration of Synephrine was present in the peel and lipolysis effects were present.

The overall conclusion:
These results suggest that the segment wall, an edible fraction, from Satsuma mandarin orange might be useful as a functional food, especially as a fat-reducing material¹.
In a 2005 statement issued by Robert E. Brackett, a director at the Food and Drug Administration before the House of Representatives he mentioned that they had found a 4% concentration of Synephrine in citrus aurantium while other times finding a concentration of chemical Synephrine of up to 90%.  I suppose if you were just going for weight loss, you’d hope yours had the 90% concentration. This ThermoLean review finds that ThermoLean does not reveal the concentration of the Synephrine it contains. That’s not to say they don’t have 90% concentration, we’re only highlighting the fact that we don’t know what the concentration is.

Gugglesterones are supposed to increase thyroid function to promote weight loss. However, studies have had varying results.

Yohimbine comes from the bark of an African evergreen tree. It has been shown to increase fatty acid mobilization. It is also used to treat erectile dysfunction.

Caffeine has been shown to increase metabolic function. Be sure you know how your body reacts to caffeine before taking any product containing caffeine.

Bioperine is an extract from the fruit Piper nigrum L (black pepper) or Piper longum L (long pepper). Both of these contain the active ingredient that you’re looking for: Piperine. They call it a “thermonutrient” because it “enhances the body’s natural thermogenic activity.” I don’t know if the ability to absorb more nutrients will directly translate into lost weight, but the added health benefits of Bioperine should not be overlooked.

ThermoLean does not disclose what the ingredients are in their “Proprietary Formula.” This is unusual; a lot of times companies have a proprietary formula, but they usually tell what the ingredients are even if they don’t give exact amounts for each ingredient. I would be concerned about a product that won’t even tell you what is in it.

How should ThermoLean be taken?

The ThermoLean website says that for fat loss you should take 2 capsules 30 minutes before breakfast and 2 more capsules in the afternoon.  For “extreme fat loss” take 2 capsules 3 times daily 30 minutes before a meal. They also warn not to take ThermoLean diet pills within 6 hours of sleep.

The website also states the following: “NOTICE: BECAUSE THERMOLEAN IS SO STRONG, WE RECOMMEND 60 DAYS ON FOLLOWED BY 2 WEEKS OFF FOR BEST RESULTS.”

How much does ThermoLean cost?

One bottle of 120 capsules of ThermoLean diet pills costs $37.99. If you take the maximum recommended dose of 6 capsules per day, one bottle will last 20 days. This equals about $57 per month. This is very expensive considering they don’t tell you everything that is in ThermoLean.

ThermoLean conclusion

This ThermoLean review finds that this is a mediocre product. It does contain synephrine and caffeine, both of which have been shown to contribute to weight loss. However, they do not give the concentration of synephrine used, so we cannot be sure it will be effective. Also, they do not list the ingredients contained in the “Proprietary Formula”. I prefer not to take anything that refuses to tell me what it contains. Choose a product that is forthcoming about its ingredients, one that includes proven ingredients in proven amounts.

1. J Nutr Sci Vitaminol (Tokyo). 2008 Dec;53(6):547-51. [↩]