“Johnson also says he takes lithium, a drug used to treat mental health issues. “
LOL !
I think he is taking more the kind you find at Life Extension not the heavy duty bi polar prescription
https://www.lifeextension.com/search#q=lithium&t=coveo4A2453FD
I will attest that Tru Niagen has really made a difference for me. HOWEVER, there is controversy about NAD+ because cancer does feed off of it. So I don’t take it every day. When I get my crushing fatigue from whatever is causing it I pop one of these pills and it’s like I did some kind of illegal drug. It fixes the problem.
https://www.lifeextension.com/vitamins-supplements/item02348/optimized-nad-cell-regenerator-and-resveratrol