b12 injection intramuscular Shots vs. IV Infusions: What is the difference? Choosing the Right Needle and
Description
[29] It has also been linked to optic nerve atrophy and neuritis

Altered intestinal transport of amino acids in cirrhotic rats: the effect of insulin-like growth factor-I

Here's the honest version, because you deserve it: 5-Amino-1MQ is not an overnight fix, and anyone promising a specific number on the scale by a specific date is guessing

PMID 14752199.
