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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Ingredient Snapshot

Overview
An antioxidant preservative that can irritate sensitive skin.
Category
Preservative, Antioxidant
Type
Antioxidant

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

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.

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.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

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.

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.

Products with Sodium Metabisulfite

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