Synthro Lean Review

Editor's Review: 3.5 / 5.0

What You Should Know

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Synthro Lean is a non-stimulant supplement that claims to ignite the thyroid to melt away fat. There are lots of supplements on the market that claim to boost thyroid function. Most are not proven and don’t work. Taking a look at the two reviews listed for this product, Synthro Lean does nothing as a standalone supplement. One reviewer combined Synthro Lean with AdrenaLean (a stimulant fat burner) with good results. There are also other dieters who’ve stacked the two and added a diuretic at the end to boost water loss. Every dieter has different needs, but we find no positive reviews for Synthro Lean as a sole weight loss supplement, which is a good indication that it does not promote thyroid function or cause fat to melt away.

List of Ingredients


  • Vitamin B1
  • Vitamin B2
  • Niacinamide
  • Vitamin B6
  • Vitamin B12
  • Biotin
  • Pantothenic Acid
  • Folic Acid
  • L-Tyrosine AKG
  • Coleus Forskohlii
  • 3B-Acetoxyandrostat-5-ene-7
  • 7-OXO DHEA
  • E&Z Guggulsterones
  • Choline
  • Inositol
  • PABA

Product Features

The thyroid helps control normal body weight. When a dieter suffers from an underactive thyroid, they often gain a ton of weight and cannot lose the weight no matter how much they diet and exercise. An overactive thyroid has the opposite effect. Dieters can eat tons of food without gaining a pound. Thyroid function is unique to each dieter, so no two dieters will have the same reaction to Synthro Lean, but it is important to note that thyroid function cannot be controlled significantly with herbal supplements. It takes prescription medication to alter thyroid function.

When we looked through the question and answer section on one website selling Synthro Lean, we were surprised to find little support for the supplement. Dieters wanted to know if they could stack the supplement with a stimulant fat burner, but if this supplement works to shed fat why would a stimulant fat burner be needed?

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  • Ingredients for Synthro Lean are found online.
  • The supplement may work if stacked with a stimulant fat burner.


  • There are no positive reviews claiming Synthro Lean promoted weight loss.
  • Thyroid function is not altered with herbal or supplement ingredients.


Synthro Lean attempts to convince the dieter that thyroid function can be altered to the point that body weight just falls off. This is not the case and there is no clinical proof any of the ingredients in Synthro Lean will have this spectacular effect on weight. The reviews from customers who’ve used the product claim it is ineffective unless stacked with a fat burner.

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