Snapshot
- Overview
- An antioxidant preservative that can irritate sensitive skin.
- Category
- Preservative, Antioxidant
- Type
- Antioxidant
Sodium Metabisulfite
Sodium Metabisulfite is an inorganic sulfite salt that acts as a reducing agent. In cosmetics it protects formulations from oxidation to help maintain color and scent, but it may irritate sensitive users, especially at higher exposures.
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Our take
Is Sodium Metabisulfite a Good Ingredient?
It rates Fair: it helps curb oxidation as a reducing agent, but it carries a known irritation and sensitization risk, particularly for sulfite-sensitive individuals or at higher use levels, so its benefits need to be weighed against that reactivity.
What it does
Skin Benefits
It helps slow product discoloration and off-odors by combating oxidative changes, supporting a fresher look and scent, though those with sensitivity may experience irritation.
Where you'll find it
Uses in Skincare & Cosmetics
It's found in shampoos, hair colorants, self-tanners, and face creams as an antioxidant helper, and used in cleansers and serums to protect formula aesthetics during storage.
Before you use it
Safety
Irritation, stinging, or allergic reactions can occur, especially in those with sulfite sensitivity or asthma; avoid use on compromised skin and keep away from eyes. It's typically used at low concentrations, but higher levels increase the chance of redness or discomfort. Ensure good ventilation when applying products that may release sulfur dioxide, such as some hair processes.
Products with Sodium Metabisulfite
