FAS Lean Review

Editor's Review: 3.5 / 5.0

What You Should Know

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FAS Lean is a dietary supplement created by Top Secret Nutrition. The supplement claims to support weight loss by attacking fat storage, promoting fat loss and suppressing appetite. There are no clinical studies or scientific research associated with the claims. In fact, Top Secret Nutrition even states the claims are based upon a theory. Aside from the lack of scientific evidence, dieters do have the opportunity to read the ingredient list and product description on the official website. Dieters can also purchase the supplement on the official website for approximately $22.

List of Ingredients


  • Caffeine

Adipo-Reduction Proprietary Blend:

  • Glucomannan
  • Amorphophallus Konjac
  • Polygonum Multiform Thunb
  • Loranthus Parasiticus
  • Camellia Sinensis
  • Green Tea Leaf Extract Leaf
  • Hypromellose
  • Magnesium Stearate
  • Microcrystalline Cellulose

Product Features

The majority of the ingredients listed in FAS Lean are used in traditional Chinese medicine. There is one proven weight loss ingredient, green tea. Unfortunately, there is no scientific research associated with the ingredients, leaving the efficacy of the supplement in question. The claims associated with FAS Lean include weight loss, fat loss and appetite suppression. None of the listed ingredients supports the claims.

FAS Lean does an excellent job providing references relating to the studies on weight loss, but none of the studies are linked to the actual supplement. A company providing information not linked to the supplement in question loses validity.

The supplement is available on the official website as well as third party ecommerce site. FAS Lean is rather inexpensive, retailing for less than $25. Comparable supplements on the market retail for a minimum of twice the amount of FAS Lean.

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  • The supplement is available on the official website.
  • The ingredient list is available to review on the website.
  • The supplement contains a proven weight loss ingredient.
  • The supplement is inexpensive.


  • There is no guarantee of weight loss.
  • There are no clinical trials or scientific research associated with the supplement.
  • The ingredients are listed in a proprietary blend.
  • The supplement contains more than 200mg of caffeine.


There must be a reason why FAS Lean was created by Top Secret Nutrition; it appears as if everything about the supplement is a secret. There is no information supporting the claims of weight loss or fat loss. The supplement lists ingredients in proprietary blends, with no indication as to how much is consumed with each serving. Dieters may look at the price and consider the supplement a value, but with no evidence of effectiveness, dieters will seek out a different supplement. Dieters wanting to lose weight and reduce fat must incorporate supplements with proven ingredients, exercise frequently and eat a balanced diet.

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