Ingredient glossary
Betaine
INCI: Betaine · Also: Trimethylglycine
Solid and proven
Does Betaine clash with what you already use? Check it →A genuinely useful ingredient with real evidence behind it, not hype.
What it does
- hydration
- osmoprotection
moderate evidenceIn vitro and cosmetic studies suggest betaine reduces irritation and supports hydration by acting as a cellular osmoprotectant.
On a label: usually effective at 1-5%.
Who it's for, and who should skip it
Tends to suit
- dry
- dehydrated
- sensitive
Approach with care
No specific group flagged to avoid it.
- Clogs poresLow
- Irritation riskLow
Plays well with
- humectants
- ceramides
This, for every label you own
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Educational information about a cosmetic ingredient, not medical advice.