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  1. Actually on the topic of Vitamin D I just found that these days, with the rapid growth of science and technology, performing a vitamin D test is now possible even at home. It is not necessary to visit the doctor anymore to get this test performed. There are blood test spot kits available and you can take help of these kits to do it all by yourself. The finger is punctured at a spot to collect blood on a unique kind of blotting paper. The result is generally accurate and easy to understand. I bought a home test kit and found I did have a minor deficiency.