So I had terrible terrible muscle pain, mainly in legs and arms (big run across all leg muscles) specially in the outside of leg and Joints. I stopped vit D and muscle pain is gone, I stopped because I was suspecting that is what it was. I am not even wanting to do my 3 times test (I usually make sure 3 times start/stop) that it is the cause. I am VDR +- not sure that has anything to do with it. Anybody else experience this beyond the first days, I am taking about after 3+ months of being on it.