What it is
Diglycerin is formed from two glycerin units joined together and functions much like glycerin as a humectant, attracting water to help keep the skin hydrated. Compared with glycerin it is often described as having a slightly less sticky, smoother skin feel, which makes it useful in lightweight emulsions. In sunscreens it supports hydration and pleasant texture without affecting UV protection.
Safety & warnings
Considered a mild, well-tolerated humectant suitable for most skin types, including sensitive skin. It is not associated with allergenicity or comedogenicity at normal cosmetic use levels.
Origin & sourcing
Typically manufactured by controlled polymerization of glycerin; the starting glycerin can be derived from plant oils or be of synthetic or animal origin depending on the supplier.
Questions everyone asks
How is diglycerin different from glycerin?
It is two glycerin units bonded together; it works as a humectant like glycerin but is often perceived as having a lighter, less tacky feel.
Is diglycerin good for dry skin?
Yes, it is a humectant that helps attract and retain water in the skin, supporting hydration in moisturizing formulas.