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Where the sun doesn’t shine? Skin UV exposure reflected in poop

Exposure of the skin to UVB light alters the mix of bacteria found in the gut, possibly via vitamin D FRONTIERS The Sun can indeed shine out of your backside, suggests research. Not because you’re self-absorbed, but because you’ve absorbed gut-altering UV radiation. This is the first study to show that skin exposure to UVB light alters the gut microbiome in humans. Published in Frontiers...