Why after thousands of years of consuming alcohol and bread there are still people who are allergic or intolerant to alcohol and gluten?
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People live long enough to become grandparents even if they have untreated celiac disease so they pass their genes.
There are various forms of alcohol intolerance. If people had “instant alcoholism” gene, they had it easier to handle their liquor before invention of distillation. Also some kind of alcoholism was a norm in the history.
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