Shouldn’t it just matter what’s applied on top? I don’t understand how dehydration affects hair and nails if they are just dead cells being pushed out and don’t have any structure to carry water into them.
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Idk about the other answer. Im pretty sure its just basic diffusion. If the water content of your blood is low, the cells in the living later of your skin become dehydrated, and the rate at which water diffuses into the dead layer of skin slows and it becomes dry. I dont think it has much to do with the flow of nutrients whatsoever.
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