For people with normal B12, any weight change is usually small, inconsistent, and behaviorally driven (more activity, better appetite) rather than a direct effect of the vitamin
Heres the protocol our own lab partners follow
Natural killer cytotoxicity - the ability of NK cells to kill target cells such as those infected by viruses - also increased by more than two-fold compared to placebo
Zareba P, Colaci DS, Afeiche M, et al
A supplemental nutritive source commonly used to treat vitamin B12 deficiencies, certain illnesses, or diseases like anemia in dogs, cats, and horses
It is recommended to apply ice for 10-15 minutes at a time several times a day as needed