Lack of Clinical Studies

Be wary of companies that cite the clinical efficacy of individual ingredients within a product rather than the effectiveness of the product as a whole. The highest indicator of quality in a supplement is the commission of a placebo-controlled clinical study for safety and effectiveness by an independent third party. This is of particular importance when assessing the claims of a brain supplement, as participants can be evaluated for quantifiable performance improvements on a standardized cognitive test. You expect the same high standard of research and testing before trusting a medication, so why wouldn’t you do the same before trusting a supplement?

Filler Ingredients

There are very few natural ingredients for boosting testosterone that are both potent and safe for consumption. Other herbs and compounds promoted as testosterone boosters have little clinical evidence to back their effectiveness. Watch out for supplements that include an extensive list of ingredients to create the illusion of comprehensive support. More is not necessarily better when it comes to your health. Some of the supplements we reviewed contained more than 10 unique ingredients!