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This could make it harder for the body to regulate weight
How to Administer Injections Safely Administering a Vitamin B12 injection involves a quick subcutaneous (under the skin) or intramuscular shot
While B12 is essential for metabolism and energy, injections do not speed up metabolism or cause weight loss except in cases of deficiency-caused fatigue or poor health
doi: 10.1038/s41574-021-00551-9 148 MaZLiLLivingstonMJZhangDMiQZhangMet al
Conditions such as pernicious anemia or gastrointestinal disorders can impact the effectiveness of the shots
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