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Something that a lot of people have missed is that these tests measure metabolites (of the byproducts produced by the liver or whatever...

No, there are too many factors that we don't know. Even the elimination half-life will vary by up to like ~50% just based on her metabolism.

I thought this test was the ratio of weight of metabolite to weight of hair sample. They take 150 or so strands, cut them to a length, extract and...