Ingredient Guide
Sodium Metabisulfite
Also known as: Sodium Pyrosulfite, Disodium Disulfite
Most skin types
What It Is
A sulfite compound used as an antioxidant preservative in cosmetic formulations to prevent ingredient oxidation and extend shelf life.
What It Does
Prevents the oxidation of other formula ingredients, helping maintain the stability, color, and efficacy of the product.
Best For
N/A — a preservative/stabilizer, not a skin-active ingredient
Benefits
- Protects formula stability by preventing oxidation
- Extends product shelf life
When to Be Careful
- Sulfite compounds can cause reactions in individuals with sulfite sensitivity (relatively rare)
- Those with sulfite allergies should check for this ingredient
Commonly Found In
Scalp serumsAntioxidant formulasMulti-ingredient treatments
Products Containing Sodium Metabisulfite
FAQs About Sodium Metabisulfite
What is sodium metabisulfite in skincare?
It is an antioxidant preservative that protects the formula from oxidation, keeping other ingredients stable and effective throughout the product's shelf life.
Is sodium metabisulfite safe?
For most people, yes — it is safe at the concentrations used in cosmetics. Individuals with known sulfite sensitivity should check with their dermatologist before using products containing it.