What works, what does not, and what is dangerous. Reviewed by the Scan Dose Research Team.
Prevagen: ZERO credible evidence (single study not placebo-controlled, not peer-reviewed). Vinpocetine (Alpha Brain): FDA miscarriage warning. Galantamine on Amazon: <2% of label. Omega-3 DHA: modest evidence for cognitive maintenance. Bacopa monnieri: may improve memory (takes 8-12 weeks). Ginkgo biloba: inconsistent evidence. Lion's mane: preliminary (use Real Mushrooms brand).