Anti-inflammatoryAntioxidantSoothing
Adenosine
Tier 3 Evidence
what it does
A naturally occurring nucleoside found in all living cells. Used in skincare for anti-aging and calming effects, though large-scale randomised trial evidence remains limited.
The 'could be onto something' ingredient. Shows up in K-beauty anti-agers and the safety profile is impeccable, but don't expect tretinoin-level results. Think of it as a gentle support player, not the main event.