I have my results for vitamin D and was called into the GPs last week. My results were D2 <10, D3 29.1. (Sorry do not know the ranges as GP refused to give me a print out). The GP has given me Desunin 800iu. I did try to get an injection saying it would work quicker as I had been ill for a while but they refused. My question is, is this a sufficient amount as I am sure I have read on this forum we need to take much higher maybe 8000? If so which type of vitamin D should I buy? Thank you.