It does help as long as the sun is high enough. Easy to check: If you shadow is the same length as your height (or shorter) you can make vitamin D from the sun.
It does help as long as the sun is high enough. Easy to check: If you shadow is the same length as your height (or shorter) you can make vitamin D from the sun.
I use a sub-lingual Vitamin D spray in winter. I was diagnosed with osteoporosis when they discovered I had coeliac disease, so need this to make best use of calcium.