Glycerin
Glycerol
AStrong clinical evidence (multiple RCTs)Safety: Safe
Chemical Function
Foundational humectant that draws water into the stratum corneum.
Scientific Evidence
Decades of evidence confirm hydration and barrier support; effective even at low concentrations.
Quality of EvidenceStrong
Interactions
Universal; the backbone of nearly every moisturizer and serum.
Pro-Aging Relevance
Maintains hydration that declines with age.
The Science Behind Glycerin
Glycerin is the most reliable humectant in skincare. It draws water into the outer skin layer and helps the barrier hold it, working quietly behind flashier actives.
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