Vitamin D is a steroid derivative, can be divided into vitamin d2 and vitamin d3. Multi-vitamin d2 contained in the plant foods, it is a plant of ergosterol synthesis by exposure to sunlight, vitamin d3 by human skin and fatty tissue in the 7 – dehydrocholesterol synthesis by sunlight
Vitamin D test and vitamin d levels:
Serum 25 – hydroxy vitamin d3 of the reference value: 26 ~ 65ng / L.
Vitamin D toxicity:
Vitamin D is non-toxic, the easiest way is to get to from the sun
Vitamin d foods / sources of vitamin d:
Vitamin D primarily in fish, animal liver, egg yolk and meat in the. In addition, like skim milk, cod liver oil, cheese, nuts and seafood, adding vitamin D, fortified foods. Also rich in vitamin D. Almost no plant foods contain vitamin D, vitamin D comes mainly from animal foods. Source of vitamin D and other nutrients is slightly different, in addition to food sources, they can also come from their own synthesis of manufacture, but this requires more than the sun, receive more ultraviolet radiation.
Benefits of vitamin d
Vitamin D has the following physiological functions:
1, improving the body of calcium and phosphorus absorption, the plasma levels of calcium and plasma phosphorus saturation level.
2, to promote growth and bone calcification, and promote healthy teeth;
3, the absorption of phosphorus increased through the intestinal wall, and by increasing renal tubular reabsorption of phosphorus;
4, to maintain normal blood levels of citrate;
5, to prevent loss of amino acids through the kidneys.
Sufficiency or Lack of vitamin D effects on health
Lack of vitamin D the body can cause rickets, tetany and rickets.
People need vitamin supplements
1. Living in the city, especially those who smoke pollution in the region should consume more vitamin D;
2. Night workers, nuns, or because the clothing, lifestyle, people can not fully get the sun to pay special attention to diet to increase vitamin D intake;
3. If you are taking anticonvulsant drugs, you must increase the intake of vitamin D;
4. Drink milk without vitamin D children need to increase vitamin D intake;
5. Skin color than the black and live in the northern area of climate-based people need more vitamin D.