A regulatory-first guide to how NAD nasal sprays are classified in the U.S. in 2026. Learn what's legal, what isn't, and how to verify a legitimate provider before you buy.
A regulatory explainer on the legality of NAD+ nasal sprays in the US in 2026 — FDA classification, prescription status, and interstate shipping rules. Learn how to identify a trustworthy provider and avoid unregulated sources.