If you need additional B12, why not just take a supplement?
Unless you have GI problems or a lack of the intrinsic factor needed, there shouldnt be a problem that way.
Runners I know inject 1mg once a week for a month or two. If you think that you may have absorption problems with oral B12, there are also sublingual tablets. Do you have heartburns ?
no heartburn, i just feel injections are more effective. ive been taking 5500mcgs every 3 days so far. i was just wondering what was the maximum safe amount.
Orally, B12 absorbtion is controlled, so theres no real worry that way. Injections are a different story, but cant find a safelevel/toxic effects either.
