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

HYDROXYBUTYROYL PHYTOSPHINGOSINE

Safety grade: A

This plant-derived ingredient helps strengthen your skin's natural barrier by replenishing ceramides, which are fats that lock in moisture. It works deep in the skin to improve hydration and reduce dryness, making it especially useful in moisturizers and anti-aging products.

Graded using: COSING.

Last verified: June 9, 2026