The benefits of vitamin B12 shots Whenever people find it difficult to maintain adequate vitamin B12 levels, either because they have an absorption problem or follow a vegan or vegetarian diet, B12 supplements often come to their aid
Major medical sources note very limited research on lipotropic injections for weight loss, and that any weight change is often more attributable to the overall program (nutrition, activity, calorie intake) than the injection alone
The lack of clear benefit in human studies may be related to the relative instability of NAC [78, 79]
If you have a B12 deficiency, common sense dictates that supplementation should make you feel better
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However, injections of vitamin B12 can stimulate your metabolism, which can help you burn calories quicker and convert food into energy more efficiently