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Each ranking reflects what the peer-reviewed literature actually says with references to support every claim

The visible result is a gradually brighter, more even tone it evens out your natural colour rather than bleaching the skin

Selenium-enriched foods are more effective at increasing glutathione peroxidase (GPx) activity compared with selenomethionine: A meta-analysis

Kang B, Bansal M, Mehta U (1998) Selenium supplementation and diet induced hypercholesterolemia in the rat: changes in lipid levels, malonyldialdehyde production and the nitric oxide synthase activity

Extracts from European propolises as potent tyrosinase Iinhibitors