b12 injection side effects in cats Vitamin Deficiency Cats: The Basics Vitamin B12 Deficiency in Cats:

Cyanocobalamin contains a cyanide group that must be removed and replaced with a methyl group before the body can utilise it

Do not use if you have Lebers disease or other hereditary optic nerve problems (high B12 can worsen vision loss)

This, in turn, boosts metabolic rate and activates a gene known as sirtuin-1 (SIRT1), also referred to as the "longevity gene." SIRT1 is involved in reducing the risk of various conditions such as diabetes, obesity, metabolic syndrome, atherosclerosis, cardiovascular disease, kidney disease, liver disease, neurodegeneration, and cancer.

Specifically, there are many factors determining how often the procedure should be done

I mention the bottom as I imagine it would hurt less