Vitamin B12 Toothpaste in Germany
A vitamin B12 toothpaste in Germany, developed in conjunction with the German Vegetarian Society, successfully improved vitamin B12 status (link: B12 toothpaste makes vegans smile).
Since people brush their teeth two times or more per day (one would hope), toothpaste can be a good way to get B12 multiple times a day. And because vitamin B12 is much better absorbed in multiple doses throughout the day, toothpaste could enhance absorption over eating B12 only once per day (or less). I am somewhat surprised that enough B12 is swallowed from toothpaste to make it a reliable source, but assuming their data was accurate, it appears plenty is absorbed.
Maybe it will come to the U.S. soon…