We in Canada do not get as much vitamin D in the winter because the sun's angle changes, and the UV rays that make vitamin D does not reach us. It is known that without vitamin D, calcium levels in our blood drops. To maintain the calcium level our bodies borrow needed calcium from our bones. This can cause the bones to become fragile. Deficiency in vitamin D also has other negative impacts to our health. We can get vitamin D naturally by eating food such as fatty fish, egg yolk, fortified milk.