The anti-aging guru and founder of the company trying to take away your NMN supplements finally spoke out over the controversy. Action Alert! At the end of last year, we told you about the FDA’s determination that NMN, an important, naturally occurring anti-aging molecule, is not a legal supplement. Why? Because, in the FDA’s view, a drug company (MetroBiotech) started investigating NMN as a drug before it was sold as a supplement. David Sinclair, PhD, who co-founded MetroBiotech and who is an outspoken proponent of NMN’s role in anti-aging, released a statement on the FDA’s action against NMN supplements. Read more.