“””It’s WAY worse than that. Millionths would be micrograms. Picograms is trillionths of a gram. (Billionths would be nano).”””
Were the 25 picograms found in the blood sample that was probably less than one ounce?
Well, if the sample was one gram (probably around 1cc), then the measurement was 21 parts per trillion. Even ppb (parts per billion) is pretty fine and this is 1000 times less.