Ingredient guide
Tromethamine
tromethamine
In short
Tromethamine is a pH adjuster that keeps formulas stable and comfortable on the skin. It helps products stay effective without making them strongly alkaline.
editorially independent · no brand pays to be featured
Best used
Anytime
What it is
Organic amine used as a pH adjuster and buffering agent in aqueous formulas. Maintains product stability without the strong alkalinity of sodium hydroxide. Common in gentle, low-irritation formulations.
Also found as
Related
Where to find it
Options across the range, not a ranking. Run one through Lens and MIRU will tell you if it fits you.
CeraVe AM Facial Moisturizing Lotion with SPF 30
La Roche-Posay Anthelios Melt-in Milk Sunscreen SPF 60
Fit comes first: the Lens checks each product against your skin before any retailer link. We may earn a commission, at no cost to you. Picks are editorial, never paid.
Common questions
What does Tromethamine do in skincare?
It stabilises a product’s pH so the texture and active ingredients remain consistent.
Is Tromethamine suitable for sensitive skin?
Yes, it’s commonly used in gentle formulas because it adjusts pH without being harsh.
Where is Tromethamine typically used?
You’ll see it in moisturisers, sunscreens, and serums that rely on steady pH for performance.
Stay in the loop
Get notified when MIRU launches and new features drop.
Unsubscribe anytime.
Checking a product label? Use the product checker to rate the full list against your current focus.
Personal guidance, not medical advice.