Tromethamine: what it is in skincare
⏱ 1 min read
⚡ Quick answer: A buffering agent that helps neutralize and stabilize the pH of a gel or lotion.
A buffering agent that helps neutralize and stabilize the pH of a gel or lotion.
What it does
Function: ph-adjuster. pH adjusters fine-tune a formula to skin-friendly acidity, which keeps both the product and your skin barrier happy.
How to spot it on a label
On a Korean product's INCI list, look for Tromethamine. Ingredients are listed high-to-low by amount, so its position hints at how much is in the formula. See all ph adjusters →
Explore more K-beauty guides → ⏭ Up next⚗️ Xanthan Gum: what it is in skincare✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-08.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.