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16 Why were metal traces found in SM’s hair?

Taken from a recent comment by Byron Deveson.

….. In general SM’s hair contains elevated concentrations of many elements, particularly metals that are associated with ore deposits of base metals such as lead, zinc and copper.

(1) Zinc is the third most used non-ferrous metal after aluminium and copper. About 50% of production is used for galvanising steel to protect it from rust. Zinc compounds and dusts are used in cosmetics, plastics, rubber, ointments, sun screen creams, soaps, paints, ink, fertilisers and batteries. (Wikipedia)

(2) Copper Powder is powdered metallic copper. In cosmetics and personal care products, Copper Powder is used in the formulation of eye makeup, face powders, lipsticks, hair color sprays and hair coloring products. (cosmeticsinfo.org)

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