NMN, explained
NMN is a building block of NAD+ that shows promise in the lab, but it hasn’t been properly tested in creams on real people yet. Treat it as an exciting extra, not a replacement for proven ingredients.
What it is
NMN (nicotinamide mononucleotide) is a molecule your body turns directly into NAD+, the cell’s energy and repair helper. It sits one step before NAD+ in the chain, and one step after niacinamide. Our NAD+ guide has the full picture.
NMN became famous as an anti-ageing supplement. Now it’s turning up in serums and creams, including some K-beauty launches.
What the research shows
Most of the evidence for NMN on skin comes from the lab:
- Studies on human skin cells suggest NMN may support repair and calm inflammation [1].
- Most research on NMN applied to skin has been in animals.
- Many skin studies combined NMN with other ingredients, so it’s hard to know what NMN did on its own.
What’s missing is good-quality trials of NMN creams on real people’s faces. Research on NMN supplements looks at blood levels and energy, not skin.
NMN is fragile
In one formulation study, nearly 90% of the NMN broke down after a month kept at 45°C. It stayed fairly stable at room temperature and in the cold.
IFSCC Congress, 2022 [2]
- Don’t keep NMN products in a hot bathroom or on a sunny windowsill.
- Choose airless or opaque packaging.
- Use it up within the time on the label after opening.
NMN creams vs NMN supplements
This guide is about NMN in skincare. NMN capsules are a separate topic. In the UK, NMN supplements are classed as a “novel food” still under assessment by the Food Standards Agency, so they aren’t banned but aren’t formally approved either [3]. Those rules don’t apply to NMN in creams.
Sources
- Laboratory study of NMN on human skin cells. 2025.
- Nicotinamide mononucleotide application in skin care products. IFSCC Congress abstract. 2022.
- NAD supplements: can they really slow down ageing? Which?
This page is general information, not medical advice. Last updated 31 October 2026.