Why do I need vitamin D as a teen?

You need about 600 international units (IU) of vitamin D daily to maintain normal blood levels of calcium and phosphorous. Vitamin D helps your body to absorb calcium, keeping bones strong; it is also an immune booster. Keep in mind that about twenty minutes of exposure to bright sunlight daily can help you meet your vitamin D needs.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.