1, improve the absorption of calcium and phosphorus in the body, and make the plasma calcium and phosphorus levels reach saturation level.
2, promote growth and bone calcification, and promote sound teeth.
3. Increase the absorption of phosphorus through intestinal wall and the reabsorption of phosphorus through renal tubules; .
4. Maintain the normal level of citrate in blood.
5, to prevent the loss of amino acids through the kidney.
Second, the impact of VD surplus and deficiency on health. Lack of VD in human body can lead to rickets, hand and foot convulsions and rickets. Long-term excessive intake of VD(5000IU) will lead to hypercalcemia and hypercalcemia. It is characterized by loss of appetite, excessive thirst, nausea, vomiting, irritability, weakness and diarrhea. In severe cases, it will die due to calcification of kidney, heart and aorta. ?
Third, people who need more vitamins.
1. People living in cities, especially those living in areas polluted by heavy smoke, should take more VD.
2. People who work at night, nuns, or people who can't get enough sunshine due to clothing, lifestyle and other reasons should pay attention to increasing the intake of VD in their diet.
If you are taking antispasmodic drugs, it is necessary to increase the intake of VD.
4. Children who drink milk without VD must increase their intake of VD;
5. People with darker skin and living in northern climate areas need more VD.
Refer to the above-what is the use of VD?