Interesting, but biased Outside on Vit. D lack & sunscreen

Australia’s official advice? When the UV index is below 3 (which is true for most of the continental U.S. in the winter), “Sun protection is not recommended unless near snow or other reflective surfaces. To support vitamin D production, spend some time outdoors in the middle of the day with some skin uncovered.” Even in high summer, Australia recommends a few minutes of sun a day.

Is Sunscreen the The New Margarine?
Outside on-line Jan. 10 2019.
Rowan Jacobson.
Current guidelines for sun exposure are unhealthy and unscientific, controversial new research suggests—and quite possibly even racist. How did we get it so wrong?

If there was one supplement that seemed sure to survive the rigorous tests, it was vitamin D. People with low levels of vitamin D in their blood have significantly higher rates of virtually every disease and disorder you can think of: cancer, diabetes, obesity, osteoporosis, heart attack, stroke, depression, cognitive impairment, autoimmune conditions, and more. The vitamin is required for calcium absorption and is thus essential for bone health, but as evidence mounted that lower levels of vitamin D were associated with so many diseases, health experts began suspecting that it was involved in many other biological processes as well.

And they believed that most of us weren’t getting enough of it. This made sense. Vitamin D is a hormone manufactured by the skin with the help of sunlight. It’s difficult to obtain in sufficient quantities through diet. When our ancestors lived outdoors in tropical regions and ran around half naked, this wasn’t a problem. We produced all the vitamin D we needed from the sun.

Yet vitamin D supplementation has failed spectacularly in clinical trials. Five years ago, researchers were already warning that it showed zero benefit, and the evidence has only grown stronger. In November, one of the largest and most rigorous trials of the vitamin ever conducted—in which 25,871 participants received high doses for five years—found no impact on cancer, heart disease, or stroke.

Don't you have butter things to do, Fritz?😎

Mouse!

Drink yer milk, big boy

To clear up some of the uncertainty, the NIH has funded one of the largest randomized trials on vitamin D, with the results expected to be ready next year. Maybe then we'll have a better sense of what, if any, benefit this vitamin holds.