noun
natural moisturizing factor; NMF
Technical term in dermatology and cosmetics for substances naturally present in the skin that help retain moisture.
天然保湿因子は、角質層の水分保持に重要な役割を果たす。
Natural moisturizing factors play an important role in retaining moisture in the stratum corneum.
Compound of 天然 (natural), 保湿 (moisturizing), and 因子 (factor). Likely a calque from English 'natural moisturizing factor'.