ONE THING HOUTTUYNIA CORDATA EXTRACT

What is this product?

A single ingredient toner from ONE THING whose entire list is four entries: houttuynia water at 94 percent, butylene glycol, 1,2-hexanediol, and houttuynia extract at 1 percent. There is no purified water entry, no fragrance, no essential oil, no acid and no preservative beyond the glycol pair. The brand publishes four human studies on the extract, including a patch test on 30 subjects returning a mean reaction of 0.00 and a redness measurement in 20 subjects falling from 13.77 to 9.93 arbitrary units over 72 hours. The copy above those studies promises urgent calming, which the 72 hour timing does not match, and every study names the extract rather than the finished toner. Sold in 150 ml and 300 ml.

What makes it different?

The list is four entries long and the plant is two of them, which leaves no room for a supporting cast and no purified water entry at all. The second separator is evidence shape: four named human studies with institutions, subject counts and dates, all run on the extract rather than on the bottle, against copy that promises calming in a word the studies' own 72 hour timing contradicts.

What is in it?

The full ingredient list as the brand publishes it, in the printed order. Each name links to what we know about that ingredient.

This brand publishes its ingredient list in Korean only. Names below are the matching INCI names from the Korean Cosmetic Association ingredient dictionary, except 1 with no dictionary entry, left in Korean.

Key ingredient

• 약모밀수
• Butylene Glycol
• 1,2-Hexanediol
• Houttuynia Cordata Extract

Ingredients with no mark are ones we found nothing notable about, and when marks overlap on one ingredient we show the caution first.

Did the ad claims hold up?

We checked 27 lines this product advertises against the ingredient list and public documents. 2 of them hold up. The rest are only partly right or have nothing behind them.

Claims translated from Korean, originals preserved.

Each line is quoted as the brand published it, and each one was read on its own against the ingredient list and the documents the brand publishes.

How we read these lines

What else is worth seeing?

Products we read alongside this one.

• ONE THING Niacinamide 10% TonerAnother product in the same category
• ONE THING 병풀 추출물 토너Another product in the same category