Is it true that injections of vitamin B12 can help me lose weight?

There are many weight loss clinics that make bogus claims. Vitamin B12 has ZERO effect on weight loss. Vitamin B12 injections are for people who have been diagnosed with pernicious anemia. Vitamin B12 deficiency is in fact quite rare in north America.  The majority of weight loss clinics are run by people who know more about scams than medicine. 

Best advice, avoid weight loss clinics as the only thing you stand to lose is your money. If you really want to lose weight, eat less and walk more. Stop wasting your money on these expensive injections.