For about 6 years now I have been running low on Vit D. I take 1 50,000 unit of D2 a week (prescription) and once a year I get a recharge by taking one of these pills every day for 2 weeks. I'm still on the low end of the normal scale.
I also take B12 shots once a month because I was low on the scale of that too.
I was wondering how common is this with PD. I always thought it was a separate problem but now I wonder.