You have to do whats right for you. Regulatory agencies have a role to play, he said, but the final judgment of whether something works belongs to the people, not the F.D.A. Lets say you want to make money on health-related products without feeling the squeeze of F.D.A
When B12 runs low, symptoms tend to creep in slowly enough to get blamed on something else: persistent fatigue, brain fog, low mood, weight gain or difficulty losing weight, weakness, tingling in the hands or feet, shortness of breath, and a weakened immune system
A 2022 dose-response RCT (Yi et al., Geroscience) at 300/600/900 mg/day raised NAD+ dose-dependently with no safety issues at 60 days
Rong S, Segal S, Anver M, Resau JH, VandeWoude GF