Food and Health
Due to the uncertain contribution of vitamin D3 from sunlight it is advisable to supplement the feed with vitamin D3. Vitamin D3 occurs naturally in animal products. A good source of D3 is fatty fish. Another form of vitamin D is vitamin D2. Vitamin D2 comes from plants.
It is a well known phenomenon that reptiles that live in terrariums have a shortage of vitamin D3. However, a surplus of the vitamin has also got negative results. Extreme high dosages can lead to acute poisoning. It is used, for example, as mice poison. Another result of excess vitamin D3 is hypercalcemia, which may cause disfigurement of the skeleton.
The interaction with other nutrients may influence the working of vitamin D3. A high intake of calcium and phosphor increases the risk of a vitamin D3 surplus. A high intake of vitamin A, on the other hand, checks the working of vitamin D3.