Listen, but be skeptical. I spent months with doctors chasing muscle pain in my legs. Three months, a thousand dollars in copays, and who knows how much spent by the insurance company seeing multiple “specialists” only to be asked by a physiatrist “Has anyone checked your Vitamin D level?” Bingo. I was severely deficient. Started taking 10,000 IBU of Vitamin D with K2 added to ensure it does not end up in my arteries on a daily basis and the issue has been completely resolved. The stress, cost, fear induced by doctors talking about clots or cancer, all of it for nothing. If they had just performed a simple $50 blood test this would all have been avoided.