If you are comparing NMN products, the milligram number on the label is the first thing you look at. It should not be the only thing. Because the question of 500mg versus 600mg is less important than the questions of purity, capsule shell, the presence or absence of excipients, and how the dose was determined in the first place.
That said, the difference between 500mg and 600mg is real, the choice matters for specific protocols, and the explanation is worth understanding.
What the Research Says About NMN Dose
Human clinical trials on NMN have used doses ranging from 250mg to 1200mg daily. The consistent finding is that NAD+ elevation is dose-dependent — more NMN produces more NAD+ up to a point — but the relationship is not linear and individual variation is significant. The 500mg–600mg range sits in the middle of the research-relevant window. It is sufficient to produce meaningful NAD+ elevation in most adults without approaching doses where the research on long-term effects is less developed.
500mg: The Established Protocol Dose
500mg daily is the dose most closely aligned with the human trials showing cognitive and energy benefits. It is the starting point most researchers recommend and the dose we recommend for anyone new to NMN or establishing a baseline protocol.
600mg: The Stepped-Up Protocol
600mg is for people who have already run a 500mg protocol for at least ninety days and want to work at a higher daily dose within the research-supported window. The additional 100mg represents a 20% increase in daily NAD+ precursor input. It is also a useful option for people with higher body mass, more physically demanding lifestyles, or who have assessed their response to 500mg and determined they want more.
"Start at 500mg. Stack with TMG from day one. Run ninety days. If you want to step up, move to 600mg for the next cycle. The biology will tell you which is right — but only if you give it sufficient time."
Alchemy Fit — The Science of ProtocolEditorial note: This article is for informational and educational purposes only and does not constitute medical advice. These statements have not been evaluated by the MHRA. Consult a qualified healthcare professional before beginning any supplementation.