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In 2017, the number of people who took direct-to-consumer ancestry tests more than doubled, reaching over 12 million customers. A wave of new tests claim to make all sorts of personalized lifestyle recommendations—from what skin-care products you should use to what kind of diet is best for you. The science underpinning them is often flimsy, if it exists at all.
Grits Polis, how do you comment the article?
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