As you know lactase persistence (LP), which confers the ability to digest lactose sugar as an adult, is an evolutionarily recent development. On the order of 1/3 of the human population exhibits LP, due to a variety of genetic mutations which seem to arise in the cultural background of the domestication of cattle. Some have asked about the possible associations between LP & height & weight before. A new paper in Human Molecular Genetics looks at just that, European lactase persistence genotype shows evidence of association with increase in body mass index:
The global prevalence of…
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