| http://www.w3.org/ns/prov#value | - This data is also used, more controversially, to diagnose diseases and deficiencies/excesses in your system.Modern methods are sensitive enough to find traces of minerals/metals/drugs that are a thousandth of a gram (microgram), or a nanogram (one billionth of a gram) or even a picogram (one thousandth of a nanogram) per gram of hair.Hair analysis for minerals, drugs and toxinsHair analysis is a s
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