Take a closer look at how various factors can increase risk for vitamin D deficiency, which can subsequently lead to a deficiency disease. Watch the animation to see how the body makes vitamin D by converting the cholesterol in your skin to the active form of vitamin D. Use this animation to answer the questions that follow regarding the mechanisms underlying vitamin D deficiency.

Vitamin D is an important vitamin for a healthy life. This vitamin is absorbed by intestines which then gives strength to human bones. Those people who suffer from vitamin D deficiency are more likely to experience weak bones and they become brittle. If not diagnosed and treated properly this deficiency can lead to fractures.