Originally Posted by
meleagertoo
[...] but feel that as every human being has the same basic physiology and chemistry it seems pretty unlikely that this is a scientifically accepted theorey[...]
Humans differ quite a bit. Some of us (European ancestry, mostly) can easily digest cow milk as adults. Most humans have a hard time with it, and drinking a big glass of milk leads to hours of cramps and misery. Some of us have livers that make plenty of the enzyme alcohol de-hydrogenase; others (some East Asians and others) make much less, and experience headache and flushed skin after one drink. It doesn't surprise me a bit that, for any given toxin, there's quite a bit of variation in how fast our bodies clear it.