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Alcoholism
There is an association between low rates of alcoholism in Asian populations and a single gene nucleotide change slowing the rate of alcohol breakdown.

Nesse suggested that there is an association between low rates of alcoholism in Asian populations and a single gene nucleotide change slowing the rate of alcohol breakdown.

psychoactive substances in the environment
Natural psychoactive drugs induce pleasure responses in humans due to human chemical-ecological adaptations to counteract the effects of plant chemical defense mechanisms. Specific examples of human adaptations to counter plant toxins include liver enzymes, gustation, olfaction, and vomiting. Humans, chimpanzees, and monkeys eat substances such as soil as a method for detoxification.

Studentcsc (talk) see
 * Alcoholism
 * Mesocortical Pathway
 * SPFit Theory
 * Environment of evolutionary adaptedness