For mental performance, the following doses have been taken by mouth: 0.05-1 milligram vitamin B12 taken daily for four weeks to 5.4 years; 10 micrograms or 50 micrograms of cyanocobalamin daily for one month; and one milligram of cyanocobalamin weekly for four weeks. One 1,000 microgram vitamin B12 injection has been used daily for five days, followed by one 1,000 microgram injection monthly for five months. Additionally, 1000 microgram injections have been used weekly for four weeks or monthly for six months.
Posting Note: I used Google to find the above information at the above link. It was there. I coped the above from there. When I attempted to re-use the link, it's been taken down.
This was only one of a number of indications.
Posting Note: I used Google to find the above information at the above link. It was there. I coped the above from there. When I attempted to re-use the link, it's been taken down.
I just went to the link, and the paragraph you quoted ("For mental performance. ...") is still up.