Other actives
Kaolin clay
Also listed as china clay, white clay
A soft white clay that soaks up surface oil in masks and adds body to toothpaste. It works physically; it doesn't draw out toxins or shrink pores.
What it is
Kaolin is a fine, mild clay mineral. In face masks it absorbs sebum and dirt from the surface as it dries, leaving skin matte for a while; it is gentler and less drying than bentonite clay. In toothpastes and tabs it adds body and a mild polishing effect.
The effect is physical and temporary: oil returns within hours, and clay doesn't pull 'toxins' out of skin.
How strong is the evidence?
Weak evidenceIts oil-absorbing capacity is a known physical property, but controlled trials of kaolin masks for acne or pore appearance are essentially absent.
What it's used for, checked
Absorbing oil and shine
Holds upA temporary matte effect from simple absorption.
Detoxifying skin
FalseSkin doesn't store toxins that clay can draw out.
Shrinking pores or treating acne
UnprovenOften paired with salicylic acid, which is the actual acne active.
Who should be careful
- Can dry and tighten skin; limit masks to once or twice a week if your skin is dry or sensitive.