is b12 injected into meat Sure, has B12. But guess where that comes from? Supplements. : r/vegan B12 doesn't magically come from
Description
But, if you are not deficient at all (check out our symptoms list), then the B12 likely wont do much

B12 thins the blood and prevent stickiness which improves the cells from sticking together which can lead to a blood clot and reduce the risk of a stroke

Cyanocobalamin (B12) Injection 1 Cyanocobalamin, synthetic compound of vitamin B12, supports several methylation reactions in the body

A., Pfeiffer C
