Vitamin D is part of the fat soluble secosteroids, with two main forms, vitamin D2 and vitamin D3.
Vitamin D3 can be get from direct sunlight or food source like milk.Food such as fish, meat and eggs are rich in vitamin D. Also there are some supplements.
Vitamin D Deficiency Symptoms
Bones Weakend are most important part of first symptoms. It make weaks the joint of the body where bones joint.
Depression and fatique : Lack of Vitamin D can result to depression and fatique. Sunlight reach inside bpdy reduce 25O(h) level in body hence depression also.