I had a year or two of chronic lower back pain and thought it was just the price of getting older (also mid 40s) and living a largely sedentary life. Then I sta

I had a year or two of chronic lower back pain and thought it was just the price of getting older (also mid 40s) and living a largely sedentary life. Then I started taking a Vitamin D supplement for a totally unrelated reason (mood, basically) and my back pain disappeared! I was extremely surprised (and happy!).