Biotin You might have taken this B vitamin after you chopped your hair into that regrettable pixie cut, as biotin is known for promoting stronger hair. But biotin can also be extremely beneficial for your skin thanks to its role in regulating fatty acid metabolism. Fatty acids help regulate new skin cells from external damage and dehydration. If your body lacks biotin, your skin cells will show that their defenses are down. (Think: cracks on the sides of the mouth, overall itchiness and scaly skin.) Having a true biotin deficiency is uncommon, but working extra biotin into your diet can help moisturize parched skin when the weather outside is frightful. In supplement form, 30 to 100 micrograms daily is sufficient.
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