Glucono Delta Lactone ek polyhydroxy acid (PHA) hai jo gluconic acid mein convert ho jaata hai. Yeh gentle exfoliation karta hai, skin ko hydrate rakhta hai, aur antioxidant benefits deta hai. Formulations mein chelating agent aur pH adjuster ke taur par bhi kaam karta hai. Yeh sensitive skin ke liye accha hota hai kyunki bahut zyada harsh nahi hota.