Vitamin D can be supplemented with medications, dietary supplements, and lifestyle changes, and vitamin D-rich medications such as Centrum, 21 gold vitamins, or Starshark for children can be effective in supplementing vitamin D. There are also vitamin D and calcium complexes that can also play a role in supplementing vitamin D. Vitamin D is also found in the lean meat and fat of animals, and in the yolk of eggs. 3. After taking vitamin D, it is recommended to exercise outdoors and get more sunlight to fully absorb vitamin D.