On March 6, I posted that in light of new research, I was raising the lower limit of my single-dose B12 supplement recommendations from 10 µg to 25 µg. This was an extrapolation, but I just came across some new research to reinforce this change. A study from India shows that 10 µg of B12 in one single dose per day was not enough to lower homocysteine to ideal levels.
Thanks, Tom!