Gluconolactone
GDLGlucaric acid lactone
Humectant, pH adjuster
Gluconolactone is a naturally occurring ingredient that helps keep skin hydrated and balanced. It's often used in skincare products to maintain the skin's natural pH level.
Low Concern
Source: FDA GRAS list
Gluconolactone is generally considered safe for use in cosmetics and personal care products, as it is recognized as Generally Recognized as Safe (GRAS) by the FDA.
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Last updated: May 16, 2026