This is my first post, but I've been lurking for a while and learned a great deal. I am 51 yo female and am seeing a well respected autism doc. Many labs seem to point to cfs and/or lymes. I take 1200 IU D/day. Recent labs show D3 = 42 and D 1,25 = 86. My whole blood Ca = 56.9 (48 - 61 lab range) tested by ELN. I do not supplement with Ca, but take 400mg Mg glycinate/day. My doc strongly recommends boosting D3 to 4,000 IU. I'm concerned that this will push D 1,25 higher and that would be dangerous. Please help me sort out this confusing situation. Thank you so much.