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Smith IK, Vierheller TL, Thorne CA (1988)

Dihexa's potency claims come from a single laboratory's work that has faced integrity challenges (expression of concern and retraction), and no human data exists to determine whether this translates to clinically meaningful cognitive enhancement

Pocernich, C

The amylin receptor, calcitonin receptor + RAMP The amylin receptor is not a stand-alone molecule

Noopept appears to have neuroprotective and cognition-enhancing properties, but it belongs to the nootropic family of drugs known as racetams.98 While there isnt much data on Noopepts safety, specifically, other racetams, like Piracetam, can lead to psychomotor agitation, dysphoria, tiredness, dizziness, forgetfulness, headaches, and digestive upset.99 So, until we know more about Noopepts safety, it may be best to assume that it, too, can lead to similar adverse effects