The sun protection factor (SPF) of melanin is possibly as high as SPF 4, according to one study 12
Eggs and whey protein are especially good sources
Eide, P
Rinaldi, S
Additionally, its antioxidant properties help safeguard the skin from damage to free radicals, while its antimicrobial effects can prevent bacterial infections

Ingredients in L-Glutathione Cream: L-Glutathione Cream Contains Purified (deionized) water, Aloe barbadensis (aloe vera) leaf gel, vegetable glycerin, stearic acid, beeswax, Prunus amygdalus Dulcis (sweet almond) oil, extra virgin Cocos nucifera (coconut) oil, Simmondsia Chinensis (Jojoba) seed oil, glyceryl stearate, cetyl alcohol, Theobroma cacao (cocoa) seed butter, Setria glutathione [as L-glutathione (oxidized)], Phenoxyethanol, d-panthenol (vitamin B-5), vitamin E (as d-alpha tocopheryl acetate), soy lecithin, Thymus vulgaris (thyme) leaf extract, potassium hydroxide, xanthan gum, Allantoin, Origanum vulgare (oregano) leaf extract, Cinnamomum zeylanicum (cinnamon) bark extract, Rosmarinus officinalis (rosemary) leaf extract, Lavandula angustifolia (lavender) flower extract, Mentha piperita (peppermint) leaf extract, Citrus medica Limonum (lemon) peel extract, Hydrastis Canadensis (goldenseal) root extract, Olea europaea (olive) leaf extract