A member asked:

Are there any studies to confirm or debunk the efficacy of urine and/ or hair testing for heavy metals?

A doctor has provided 1 answer

Many.: Depends upon the heavy metal. In general urine and blood levels are much more accurate and reliable than hair. Urine and blood levels are generally quite accurate.

Answered 6/14/2014

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A member asked:

Do synthetic drugs show up on hair test or urine test?

A doctor has provided 1 answer