I have really felt like crap the last 6-8 weeks. I'm injured and have barely spent any time outside during this time. I started taking vit D the past week and have gotten progressively better during this time. Of course it's possible it's a placebo, but I take a lot of vitamins and supplements as it is (fish oil, DHA, vit A, different herbs), so I'm not sure I'm really thinking about one extra pill at all... Anyone here experience something similar?