Got the blood work results back today. Cholesterol is good (by the way, that seems to shock everyone, I'm told everybody has high cholesterol these days), A1C is OK but not great - 7.0 (back to the gym)! PSA is good, no problems there. However, he says my Vitamin D should be around 50, and mine is around 13. Says that's a problem and could contribute to general weakness and sleepiness during the day, muscle pain, etc. He recommended I start taking 2,000 Units a day of over-the-counter Vitamin D, he'll test my blood again in 3 months. Anyone ever hear of this? I actually try to avoid taking supplements of any kind; I just take my Metformin for my diabetes and call it good. Since my echo-cardiogram came back clean as a whistle last year, I don't even take low-dose aspirin; seems they can't find any hard plaque or stuff clogging up my arteries, so I'm not really at risk for heart attack or stroke from that. Give me your thoughts, especially if you have to take Vitamin D. What's the story here?