Since hair grows out of the skin, chemicals that the skin absorbs can become incorporated into hair.Ingested or absorbed toxins can be detected by chemical analyses of hair.These ingested or absorbed toxins include:

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Hair analysis can detect a variety of ingested or absorbed substances, including arsenic, lead, and drugs, as these substances can become incorporated into the hair as it grows.

Since Hair Grows Out of the Skin, Chemicals That the Skin