Vitamin D is necessary to regulate the amount of calcium and phosphate in the body. Deficiency of this vitamin may lead to several health concerns like loss of bones, weak muscles, rickets and osteoporosis. To prevent these diseases, it is crucial to obtain the daily recommended amount of Vitamin D.

Vitamin D2 and Vitamin D3 are the two commonly available supplements of Vitamin D. D2 occur in plants, whereas D3 is produced in response to sun exposure and is found in animal products. D3 is considered better as compared to D2, but prolonged intake of the nutrient may lead to Vitamin D toxicity.

RDA for vitamin D is 600 international units (IU) per day for young adults and 800 IU per day for adults older than 70. If the level goes up above 150 ng/ml (375 nmol/l) it leads to vitamin D intoxication. Here are 4 common side-effects of Vitamin D intoxication: