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A-listers swear by them, and they’ve become all the rage in wellness circles over the last few years, but some of us still don’t know much at all about the elusive NMN supplements.

Prior to 2025, NMN supplements were not permitted by the FDA to be marketed as dietary supplements. However, this September, the FDA reversed its position . As a result, NMN supplements are no longer restricted under the drug-preclusion rule — sparking even more questions about their purported anti-aging benefits for users.

Nicotinamide Mononucleotide, also known as “NMN,” is a molecule involved in the production of nicotinamide adenine dinucle

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