Vitamin D helps maintain appropriate levels of <span style = 'background-color: #dae8f4'>calcium</span>
in the blood
, and it helps your digestive system absorb <span style = 'background-color: #dae8f4'>calcium</span>
from your food. Your body produces vitamin D when your skin is
exposed to sunlight, and you consume some vitamin D in food. If you don't get enough vitamin D, then calcium
levels may drop.
Chronic kidney failure. Your kidneys convert vitamin D into a form that your body can use. If your kidneys function poorly, useable vitamin D may decline and calcium