Given that there is no scientific evidence of those symptoms, I suspect that site pulled it out of their ass. If vitamin D deficiency did cause those symptoms,

Given that there is no scientific evidence of those symptoms, I suspect that site pulled it out of their ass. If vitamin D deficiency did cause those symptoms, they would be symptoms of ricketts. >Given that at the time it was Winter in the UK and I'd gotten into a sleep pattern of being awake at night and asleep during the day, I think a Vitamin D deficiency was pretty likely. Possibly (assuming you didn't eat much milk or fish). However your symptoms probably had more to do with your sleep pattern than vitamin D.