Humectant ·
Betaine
What is it?
A naturally occurring osmolyte (trimethylglycine) found in beets and other plants, used in skincare as a humectant and cell-protectant.
What does it do?
Organic osmolyte studied for protecting skin cells from oxidative and UV-induced stress -- in vitro research shows it (alongside related osmolytes like taurine) helps preserve tight-junction barrier function in UVB-irradiated keratinocytes and is taken up by dermal fibroblasts as a protective response to osmotic/UV stress. Direct human efficacy trials specific to betaine as a standalone humectant are lacking.
Sources
This page provides general skincare information and is not medical advice, diagnosis or treatment. Ingredient interactions and evidence summaries reflect published, cited sources — not a personal assessment of your skin. For medical skin conditions, rashes, pregnancy/lactation questions or persistent concerns, please consult a licensed dermatologist or HPCSA-registered practitioner.