0 any of a group of vitamins, found in foods such as liver, some fish, and egg yolk, that are important for healthy bones and teeth --
People with vitamin D deficiency need to eat foods with vitamin D or take vitamin D pills.
One doctor said that 80 percent of her patients do not get enough vitamin D. This is called vitamin D deficiency.
Although sun is a natural source of vitamin D, scientists think that 15–20 minutes of sun on our skin every day is enough to get healthy amounts of this essential vitamin.
