Yeah it's definitely a good idea to inform yourself before popping a bunch of pills. But, examining your diet is not going to help you make an informed decisio

Yeah it's definitely a good idea to inform yourself before popping a bunch of pills. But, examining your diet is not going to help you make an informed decision in this particular instance. For example, you could have a gene that causes D malabsorption, or a specific type of gut bacteria that breaks down D3. If you are serious about it, then a quick blood test is the best way to know. [1] More importantly Vitamin D is tricky, because it has risks on BOTH side of the equation. Deficiency can be very serious as well. Human biases tend towards non-action when confused or overwhelmed with information. If anyone is interested in my data that has helped me, my blood tests are available on Google Docs[2] as well my 23andme partial genome[3] [1] http://labtestsonline.org/understanding/analytes/vitamin-d/tab/test http://labtestsonline.org/understanding/analytes/vitamin-d/t... [2] https://docs.google.com/spreadsheet/ccc?key=0Ap5VmOaeqt6JdEx2ekVSWEc4NFVOUGpOeDdZQmFoVlE&authkey=CJCCyswL&hl=en_GB#gid=14 https://docs.google.com/spreadsheet/ccc?key=0Ap5VmOaeqt6JdEx... [3] http://bit.ly/UURj6y http://bit.ly/UURj6y