Vitamin D. From the Sun. But the cancer scares have instructed young America to limit Sun exposure.
Been around that block a few times. I think the bottom line is that, in the US, it is difficult-to-impossible to get enough vitamin D producing sunlight north of south Florida.
Too much time in front of the XBox, Internet, and boob tube.
However, it’s easy to supplement with vitamin D.
The cancer scare is real, at least in my family. My brother died of skin cancer.
So we supplement with vitamin D, and we put on our sunscreen.