Adenosine

Functions: Active ingredient

A low-dose active that's on Korea's functional-cosmetic ingredient list for fine lines.

What it does

Generally said to support the skin's collagen, helping fine lines look softer

Typical use level

About 0.04–0.1 g per 100 g

Watch out for

Can form crystals in cold water (that's a product-quality issue)
In Korea it's known as an MFDS-notified functional ingredient for fine lines at 0.04% (check the current notice)

Based on official safety documents (CIR, SCCS and similar).

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