There have been no credible test results known to me that even suggest that injections of Methylcobalamin (Methyl B-12) produce more effective results than a suitable oral regimen. Yarrow Formulas puts out a chewable, taken once a day on an empty stomach, in the dosage of 5000 mcg. Don't let that # scare you away, as the body is disposed to tolerate greater levels than lower, not to mention the logistical convenience of oral over the steps necessarily involved with injections.

I supplement this daily with another Yarrow complex named B-Right, maybe due to my "old school" belief that larger doses of a single B, prove ultimately more effective when taken in concert with a good B complex. Both are available through Amazon.com or other online venues that fellow members would be more than happy to suggest.

Wishing continued turn-around good luck.