Lots of people would probably avoid colds and flu if their Vit D levels were in line...but you need Vit K also.
Right. That’s where collards, kale, turnip greens, and other leafy greens come in handy. I eat them right out of our garden this time of year. I also freeze some to eat thru the winter. I’m 70, going on 19.
I look forward to 90, Lord willing.