News flash- data show that you, as a typical American, are likely to be deficient in a vitamin, and that this deficiency causes weak bones and muscles, joint pain, osteoporosis, and having white blood cells that can’t kill the tuberculosis bacterium. Wait- there’s more- groups of people who don’t get enough of this vitamin also have more breast and prostate cancer than people who get plenty.
Must be a new, unusual, and expensive vitamin? Not at all, it’s free actually- all you have to do is to get a little sunshine (without sunscreen) and your skin can make vitamin D. You can get a teeny little bit from milk, and a small amount from pills, but when you get 10 minutes of sun on your legs (30 minutes if you’re dark skinned) you’ll make tons of vitamin D. Therapy for tuberculosis used to be sun baths- doesn’t sound so dumb now.
Good health is all about the happy medium- drink enough water but not too much, eat enough food but not too much, and get enough sunshine but not too much. Just because you can kill yourself drinking too much water doesn’t mean that your doctor is telling you not to touch a drop. The same should go for sunshine. It’s natural.