DIHYDROXYPROPYL PROLINE is graded A (Safe) by Expert·ING, based on COSING regulatory data.

DIHYDROXYPROPYL PROLINE

Safety grade: A

This ingredient is a modified form of proline, an amino acid that helps support skin's natural structure and hydration. It works to condition and soften skin while helping products absorb better. You'll often find it in moisturizers and anti-aging formulas designed to improve skin texture and firmness.

Graded using: COSING.

Last verified: June 9, 2026