There are three different types of vitamin D, D1, D2, D3 and its really important they test all three and replace the right vitamin D. Its become really trendy to just test the overall vitamin d level and just give a straight vitamin D supplement. According to my bioidentical/wellness doc, who manages my vitamins and hormones (vitamin D is a hormone really, not a vitamin, and it controls the proper or improper regulation of the immune system supposedly. It is also an immunosuppressant, which is why docs like to give it and people with autoimmune disease like to take it along with the fact they may need it. I don't see how a disease could suck the vitamin D, but like country boy says, some forms of vitamin D needs sunlight, but very little is required from what I understand. Still, its easy to not get any sunlight when you have autoimmune disease.
I take vitamin D3 25, but really Mayo only tested my D2 and D3 and never tested my D1, which would have been better. I don't notice one bit of change taking it, especially since I eat dairy which contains plenty of vitamin D. I did notice a big change in pain, much pain relief taking vitamin B6, which works on the nervous system. Apparently I lack that. Oddly, my B12 is very high and for no good reason. The B vitamins can have a real positive effect on the nervous system and helped me alot with my peripheral neuropathy. I guess Ijust don't metabolize the b vitamins very well, so I need lots more. It might be good to see if they wll check the B ones ifyou have alot of pain. Taking B6 worked much better for me than taking lyrica or some other med. Apparenty I had a defciency.
Ills--Sjogrens-Lupus cond., AI polygland. dysfunction 2, hyper/hypopigment, scoliosis,kyphosis,stenosis, deg.,O.A.,spine surgeries, salivary/lymphectomies, NASH, COPD, RLS, UT/GI bleeds, hystero, brain/nerve damage,TB
Meds--INH,Plaquenil, Evoxac, Metformin, Synthroid, HCTZ, HRT and Lidocaine patchs, Voltaren gel, Klonopin, Vicodin, Restasis, Albuterol, steroids