Fixing the gut microbiome has been linked to a wide range of health benefits (it may, according to some studies, help lower incidence of cancer, strokes and obesity), and much of skin care, the beauty category most affected by wellness trends, is now focused on the gut as the secret to complexion perfection.

So comes a wave of designer probiotic pills and powders — stylishly packaged, with names like Glow and Inner Beauty — that suggest they can do a lot of the heavy lifting of that gut fixing for you.

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