Vitamin D is one of the important vitamins needed by the body, and when a vitamin D deficiency occurs, it can be supplemented by eating more vitamin D-rich foods or through medication. Vitamin D is involved in the metabolism of calcium and phosphorus in the body and facilitates the absorption of calcium. When vitamin D deficiency occurs, rickets due to vitamin D deficiency may occur. At the same time, the body’s absorption of calcium is weakened, which can also lead to osteoporosis and muscle weakness. When vitamin D deficiency occurs, it can be supplemented by eating more vitamin D-rich foods, such as milk, deep-sea fish, animal liver, egg yolks and other animal foods. When the symptoms are more serious, you can also take vitamin D capsules or drops to supplement. In addition to vitamin D supplementation, you can also eat more calcium-rich foods, and insist on more sun exposure, which is also conducive to the improvement of symptoms. The above medication should be taken in accordance with the doctor’s advice.