Vitamin D is crucial for bone health. It helps your body absorb calcium and phosphorus, which are vital minerals for bones. The best ways to get vitamin D are through sunlight, food, and supplements. Just 10 to 15 minutes of direct sunlight on your skin a few times a week usually provides enough vitamin D. In terms of food, you can get it from cod liver oil, salmon, tuna, dairy products, and fortified cereals. If you're concerned about whether you're getting enough vitamin D, consult your doctor about whether you might need supplements.