4 ms·
As a single, contrary data point, I live in the North of Scotland, and get very little sunlight - I started taking 4,000 IUs a day of vitamin D around a year ag
by GordonS 7y ago
As a single, contrary data point, I live in the North of Scotland, and get very little sunlight - I started taking 4,000 IUs a day of vitamin D around a year ago, but haven't noticed any difference whatsoever.