Dear I.F.: The DV (a replacement for what we used to call the recommended daily allowance, or RDA) for vitamin B12 is 2.4 mcg ...

Mediheal is one of the biggest and most beloved Korean skincare brands. Using 3-O-ethyl ascorbic acid, a gentle derivative of vitamin C, this serum helps brighten skin tones. PHA and LHA are also ...

Vitamin B12 is an essential nutrient our bodies need to function. Here's why it's important and why you need enough.