While supplements help, injections offer faster, more complete absorption
Al, obese Zucker rats were received a dose of 500 micrograms/kg of body weight over the course of 19 days
Therefore, if you are gaining weight due to inefficient metabolism and vitamin deficiency, getting B12 vitamin shots can help you address this problem
180(2): 251 Warner MA, Mauermann WJ, Armour S, Barbara DW
Importantly, functional B12 deficiency can sometimes coexist with high total B12 levels, especially in kidney disease, and may require additional testing with methylmalonic acid (MMA) or holotranscobalamin if deficiency is suspected clinically