Magnesium comes in several supplement forms, and the type you choose affects both absorption and side effects. The two most commonly recommended are glycinate and citrate. Magnesium glycinate is bound to the amino acid glycine,… 

Vitamin D helps your body absorb calcium and supports immune and bone health. Most adults need between 600 and 800 IU (15-20 mcg) per day, according to general dietary guidelines, though needs vary by age,…