2. If you want to supplement more vitamin D, you can eat animal liver, such as pig liver, which contains vitamin D, but natural foods such as fruits and vegetables contain less vitamin D, but there are some. You can eat some properly every day, as long as the vitamins meet the needs of the human body, so it is unnecessary to supplement too much.

3. Foods rich in vitamin D include fish, animal liver, fruits and vegetables, including salmon, shrimp, milk, egg yolk, pig liver, mushrooms, orange juice and so on.

4. Outdoor activities, as long as the human body receives enough sunlight, the body can synthesize enough vitamin D.

5. The content of vitamin D in natural foods is low, and animal foods are the main sources of natural vitamin D in non-fortified foods, such as marine fish and fish eggs with high fat, animal liver, egg yolk, cream and cheese, while lean meat, milk and nuts contain trace amounts of vitamin D..

6. Vegetables, cereals, their products and fruits contain little or no vitamin D activity.