Potassium metabisulfite is an inorganic salt primarily used as an antioxidant and reducing agent in cosmetic formulations. It helps prevent oxidation, which can degrade product ingredients and shorten shelf life. It also acts as a preservative, inhibiting the growth of microorganisms.
NoneAntioxidantVeganEvidence: Medium
BenefitNone 0 / 4
RiskHigh 2.5 / 4
Sensitization
Irritation
Rated by SpottyLabs' ingredient methodology, independent of brands.
Things to watch
May cause skin irritation or allergic reactions
Can trigger asthma symptoms in sensitive individuals
Spot questionable ingredients in seconds
SpottyLabs scans any skincare product and rates every ingredient for benefit, risk and safety. Free and independent — no brand is paying us.
Is Potassium Metabisulfite safe for sensitive skin?
Potassium metabisulfite can be an irritant and allergen for some individuals, especially those with sensitive skin or sulfite allergies. Patch testing is recommended if you have concerns.
What is the primary role of Potassium Metabisulfite in cosmetics?
Its main role is to act as an antioxidant and preservative, protecting the product from degradation due to oxygen exposure and preventing microbial growth to extend shelf life.
Spotty Labs