Betaine

Also known as: Trimethylglycine, TMG

Generally SafehumectantEWG: 1

A gentle amino acid-derived humectant sourced from sugar beets.

How it works

Betaine is a naturally occurring compound in sugar beets that functions as an osmolyte — it helps cells maintain hydration under stress. In cosmetics it softens skin, reduces irritation from stronger actives, and provides mild humectant effects. It is particularly valued in formulas with potentially sensitising ingredients like AHAs or retinoids.

Best for

Sensitive skinIrritation-prone skinAll skin types

Commonly found in

Gentle cleansersTonersSerums with actives

✅ Pairs well with

Niacinamide Glycerin Ceramide NP Lactic Acid

Safety & restrictions

Excellent safety profile. One of the gentlest cosmetic ingredients.

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For informational purposes only. Not medical advice. Consult a dermatologist for personalised guidance.