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Because NAD is a supplement, its not regulated by the FDA and claims around efficacy dont have to be proven (which is required of prescription medications)

To view a copy of this licence, visit About this article Cite this article Bourgeois, B., Spreitzer, E., Platero-Rochart, D

Designed to retain the fat-reducing effects of HGH without influencing growth or insulin-like growth factor 1 levels, AOD9604 has gained attention for its potential as an anti-obesity and metabolic treatment

Some nootropics have evidence for specific uses

Reported rationale: peak GI effect is concentrated to a single day rather than smeared across the week