Low vitamin D3 means that you are vitamin D3 deficient. It can promote calcium absorption, and calcium supplementation without VD3 alone has almost no effect. A lack of vitamin D3 can lead to symptoms such as osteoporosis. So what are the reasons for the deficiency?
1. Insufficient sunlight exposure
The human body can synthesize vitamin D3 by itself, because there is a special cholesterol in the skin, which can synthesize vitamin D3 after UV exposure. Too little time for outdoor activities, unable to fully receive sunlight, vitamin D3 is easily deficient, which is also why children are prone to rickets.
2. Insufficient intake of vitamin D3
Both breast milk and cow's milk contain less vitamin D. This is not enough to meet the normal developmental needs of the child. At the same time, due to the improper ratio of calcium and phosphorus in milk, it cannot be absorbed smoothly. Therefore, milk-fed children are more likely to develop rickets than breast-fed children. At the same time, children's staple food is mainly rice cereal, porridge, etc. These foods contain a lot of phytic acid and fiber, which will affect the absorption of calcium and phosphorus.
3. Grow too fast
Children's bones develop very fast, so the demand for calcium also increases accordingly, and calcium deficiency is prone to occur. Especially premature babies, because they do not have enough calcium and vitamin D reserves in their bodies. Their growth and development are slower and prone to rickets. After the age of 2, the risk of rickets is gradually reduced due to increased outdoor activities.
4. Effects of other diseases
Some diseases can also cause vitamin D3 deficiency by affecting the absorption of calcium and phosphorus, such as chronic gastrointestinal diseases, liver and kidney diseases, etc. In addition, if phenytoin and phenobarbital drugs are taken for a long time, vitamin D3 will also be deficient and rickets will appear.