Vitamin D3

I was diagnosed with PPMS about 5 weeks ago. I gather I ought to take vitamin D3. Does anyone know what strength I ought to take? Also, are there other vitamins/supplements I should be taking?

My MS nurse reckons 4000 IU in the summer, 8000 in winter

I’m on 800iu a day but I had a blood test before that was prescribed. It was worked out by my doctor.

Take a look at this recent thread.

Thanks Whammel. I’ll go and talk to gp and get blood test.