Soybean Peroxidase

Soybean peroxidase is an enzyme extracted from soybean plants. In skincare formulations, it functions as an antioxidant — a substance that helps neutralise free radicals, which are unstable molecules that can damage skin cells and contribute to visible signs of ageing.This ingredient is typically used in small concentrations within broader formulations, where it works alongside other actives and conditioning agents to support skin health.

Soybean peroxidase is an enzyme — a type of protein that catalyses specific chemical reactions. In this case, it works by breaking down hydrogen peroxide and other reactive oxygen species on the skin's surface and upper layers, converting them into less harmful compounds.This enzymatic action differs from antioxidants like vitamin C or ferulic acid, which neutralise free radicals through electron donation. The peroxidase mechanism may be particularly relevant in formulations designed to address oxidative stress.

Soybean peroxidase is a supporting ingredient that requires no special application technique. Use products containing this ingredient as directed by the formulation — typically as part of your regular routine. It works best within a comprehensive skincare regimen that includes sun protection, as antioxidants are most effective when paired with UV defence.

Soybean peroxidase is generally well-tolerated and considered safe for cosmetic use. People with soybean allergies should check product ingredient lists, though topical exposure is typically lower-risk than ingestion.