It is a fat soluble vitamin which body can produce through exposure to sunlight whereas diet generally provides very little quantity as compared to light exposure. It helps in absorption of minerals like calcium, magnesium and potassium in the intestine. It is useful for health of bones and teeth and defends us against various diseases. It is an essential vitamin and its deficiency can lead to osteoporosis and rickets disease. Vitamin D supplements are considered very useful in reduction of its deficiency in the human body. As its fat soluble vitamin, therefore high doses of supplementation can be taken which get stored and body utilize stored vitamin D as and when required.