Rh
Rhamnose
RhamnoseHydrator
A simple plant sugar — helps hold water at the skin’s surface for a smooth, hydrated feel.
The evidence, graded
emergingPageon et al. (2019), from L’Oréal Research and Innovation, found positive effects of rhamnose on lab-grown skin made with cells from young and old donors, and say a study in people also showed effects on collagen IV and procollagen I. In an independent lab study, Novotná et al. (2023) found rhamnose raised collagen I and lowered MMP-1 and MMP-2 in young and aged human skin cells.Pageon 2019 · International Journal of Cosmetic Science ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
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