# COSRX Low pH Good Morning Gel Cleanser

> COSRX Low pH Good Morning Gel Cleanser states a pH of 5.31 ± 1.00 and lists betaine salicylate, a BHA, and tea tree leaf oil. Boots listed 150ml at £12.50 on 25 September 2026. The BHA percentage is not published, and UK retailer ingredient lists differ on whether parfum is included.

- Canonical: https://thecastindex.com/beauty/cosrx-low-ph-good-morning-gel-cleanser
- Category: Skin prep
- Format: Gel cleanser
- Finish: Clean, not stripped
- Best for: A gentle morning cleanse for oily and combination skin
- Official: https://www.cosrx.com/products/low-ph-good-morning-gel-cleanser
- Reviewed: 2026-09-25
- Method: evidence-led desk review of official specifications — not an implied hands-on test

## Should you buy this?

A low-pH gel cleanser with betaine salicylate (a BHA) and tea tree oil, from £12.50 for 150ml. A gentle morning cleanse for oily and combination skin — but UK ingredient lists disagree on fragrance, so read your pack.

Skip this if you want a published BHA percentage, avoid tea tree oil, or need a formula confirmed as fragrance-free.

A low-pH morning cleanse that clears oil without leaving skin tight before sunscreen and base.

## The formula

COSRX’s gel cleanser is built around a low pH — stated as 5.31 ± 1.00 — with betaine salicylate, a gentle BHA, and tea tree leaf oil. As a rinse-off cleanser, the BHA has only brief contact with the skin.

The brand does not publish the BHA percentage, and UK retailers publish differing ingredient lists: some include parfum and limonene and omit tea tree. Treat the pack in your hand as the definitive list.

## Who it’s for

Oily and combination skin that wants a morning cleanse which removes oil without a tight, stripped finish.

## What should you check before buying?

Check the ingredient list on your pack if you avoid fragrance or tea tree oil. Prices vary widely between UK retailers for the same 150ml tube.

## How to use it

1. Lather a small amount with water
2. Massage over damp skin
3. Rinse thoroughly

## Questions and answers

### What is the pH of COSRX Low pH Good Morning Gel Cleanser?

COSRX states a pH of 5.31 ± 1.00.

### Does COSRX Low pH Good Morning Gel Cleanser contain BHA?

Yes. It lists betaine salicylate, a BHA, alongside tea tree leaf oil. COSRX does not publish the percentage.

### Is COSRX Low pH Good Morning Gel Cleanser fragrance-free?

Sources conflict. COSRX’s and Boots’s ingredient lists show no parfum, but another UK retailer’s list includes parfum and limonene. Check the list on your pack.

## Explore the category

https://thecastindex.com/beauty/category/skin-prep