How Do I Maintain my Vitamin D Levels?
(Columbus, OH, USA)
I am an active runner and run about 25-30 miles a week. Last year I got stress fractures in my legs, so my doc prescribed 50,000 IU of Vitamin D2 - one table per week for 8 weeks. I got better. But then I stopped the prescription and now after 8-9 months I got stress fractures again but at a different location on the legs. My doc has again prescribed me 50,000 IU of vitamin D2 for 4 weeks and said that after the prescription I could start taking supplements.
My understanding is if D3 is natural occurring and more absorbable by the body(from sunlight etc) then why is my doc recommending D2? Also, D2 needs to be converted to D3 before the body can absorb...so why do doctors recommend D2 and not D3?
Also, can you advice me on how should I keep maintaining my levels once they are back to optimal? I live in Columbus Ohio so not much sunlight in winter.
Thank you for your web-site and all the information on it.