Feature British Report Most Potent Form of Vitamin D Yet Known By Science News Magazine Issue: Vol. 20 No. #556, December 5, 1931 Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print Having trouble viewing this? Open in a new window