Ingredient dictionary

Cellulose Gum

Also listed as: Sodium Carboxymethylcellulose, CMC

A plant-derived thickener made from cellulose, the fiber found in plant cell walls, that has been chemically modified to dissolve in water. It is on the label of 28 products in our library. Checked against our library November 6, 2026.

The catch: none for most people; check the full product list if your skin reacts easily.

What Cellulose Gum does

Thickens water-based formulas
Helps keep ingredients evenly mixed
Adds a smooth, slippery feel

Cellulose gum starts as cellulose, the natural fiber that gives plants their structure. Manufacturers treat it so that small chemical groups attach to its backbone, which lets it dissolve in water. The result is a dry powder that swells and thickens when mixed into a water-based base.

Formulators like it because a little goes a long way. It builds body in a clear or creamy gel, helps stop particles from settling, and leaves a slippery, cushioned feel on the skin. In cleansers it adds a smooth, rich texture. In sunscreens it helps keep the formula even and easy to spread.

Good for

Well suited to water-based cleansers and sunscreens, where it keeps texture smooth and even.

Be careful if

Nothing in particular for most skin types.

Frequently asked questions

Is cellulose gum safe for sensitive skin?

Cellulose gum is generally well tolerated, though any new product can cause a reaction in some people. Patch test first, and if your skin is very reactive, check with a dermatologist before trying a new formula.

Is cellulose gum vegan?

Cellulose gum is made from plant fiber, so it is generally considered suitable for vegan routines. Always check the full ingredient list of a specific product, since other ingredients may not be. Vegan status depends on the whole formula, not one ingredient.