I just read the article titled above. Could it really be this simple? As a child I was severely anemic. The Gamma Globulin shots were supposed to build up my immunity levels abut don't think the shots did anything for vitamin D levels. I was often in bed, sick so didn't get much Vitamin D from the sun. Also, as a child I had lots of problems with my teeth, lots of cavities in my primary teeth. The formula my mother gave me as a baby often made me quite sick, so mostly give me sugar water to help me grow. My allergies were so severe-- I couldn't keep milk down, was allergic to all dairy products (milk, eggs, cheese). My primary food source growing up was oatmeal made with water and sugar and orange juice. I did get vitamin C from orange juice. It was the only thing I could drink and keep down. No one offered Vitamin D supplements back in the 1950s. Several years ago, on my own, I began taking vitamin D supplements (30,000 mcg daily. The dentist noticed that my teeth were stronger and healthier. I also noticed I stopped getting the numerous head colds PC never checks D levels. On the one occasion that he checked it, he said it was on the low end but to drink milk. I can't drink milk, even now. Is it possible that the vitamin D jell caps have been helping?