This can easily occur if supplements are given and vitamin enriched cereals are eaten in large quantity. Vitamin D is the most toxic of all the vitamins. Sources are exposure to sunlight, fish liver oils, fortified milk and margarine, and eggs. Absorption of vitamin D made on the surface of the skin takes 6 to 8 hours to be absorbed. When you or your children spend time in the sun be sure to allow time for the vitamin D to be absorbed before you bathe.
Storage is in body fat.
It is NOT added to milk that is made into cheese and yogurt, or put into other foods.