b12 injection is for what Are Shots Safe? Royal Palm Beach Medical Group Vitamin B12 Supplements and Injections

Some of them include:

Because B12 is involved in converting carbohydrates, fats, and proteins into adenosine triphosphate (ATP)the body's primary energy currencysome assume that supplementation will "boost metabolism" or increase energy expenditure

European Journal of Endocrinology

NICE and BNF Guidance: You correctly point out that even official guidance from NICE and the BNF acknowledges that some individuals may require more frequent injections

Nicotinamide N-methyltransferase (NNMT) is a cytosolic enzyme that catalyzes the methylation of nicotinamide using S-adenosylmethionine (SAM) as a methyl donor, producing 1-methylnicotinamide (1-MNA) and S-adenosylhomocysteine (SAH)

However, when the conversion SIDA method was applied, the soybean flour showed trace amounts of CNCbl due to concentration of all cobalamins into CNCbl via cyanidation