#hair-health

1 article

**Approach: Human outcome. Palette: warm (B).**

Extreme close-up, slightly high angle, of a woman's scalp parting in her 40s. Dense, glossy chestnut-brown hair is split by a fine comb. Short new hairs rise from the visible scalp skin, and a few strands catch the light. Faces and identity are out of frame. Low golden-hour window light enters from camera left and rim-lights the strands in honey and copper. Shadows stay warm brown, with no blue cast. The shallow depth of field blurs the background hair into soft amber bokeh. A thin steel trichoscopy probe tip sits at the edge of the frame, and a tiny electric green LED glints on its housing as the only accent. The mood is hopeful but scrutinizing, like a clinical check-up with a cautious eye.

NMN Boosted Hair Density 57% in a Human Trial—With a Big Catch

BY NOVA CHEN · Oct 29, 2026

NMN, the NAD+ booster beloved by longevity fans, has now been tested on hair in people for the first time. In a 12-week pilot of 15 women aged 40-50, growth-phase hair density climbed from 55.9 to 87.7 hairs/cm², and hair diameter rose from 75.3 to 78.8 µm. Participants also reported better gloss, elasticity and volume. But there was no placebo group, the sample was tiny and the authors are linked to an NMN supplier. Here is what the numbers show, what they cannot show, and who should wait.