Take vitamin D by mouth as directed. Vitamin D is best absorbed when taken after a meal but may be taken with or without food. Alfacalcidol is usually taken with food. Follow all directions on the ...

Vitamin D is sometimes labeled as vitamin D3. You can buy vitamin D pills, gummies, chewables, liquids, and sprays in stores without a prescription. Ask your doctor for advice on choosing the right ...

The ideal range for vitamin D in healthy individuals is between 600 and 2,000 international units (IU) daily. The body is most efficient at making vitamin D at midday (12 noon) when the sun is ...

Without enough vitamin D or calcium, your parathyroid glands compensate by producing too much of their hormone, a condition called hyperparathyroidism. That can lead to bone weakening (osteoporosis) ...