how to administer vit b12 injection Give a Injection: Step-By-Step Instructions B12 Injections and IV Infusion
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Sorry for stating the obvious but have you considered changing injection sites

Primary Research Applications Weight Management & Fat Loss Studies Clinical validation demonstrates remarkable 7% body weight reduction over 10 days in diet-induced obese mice without changes in food intake compared to controls

doi: 10.1038/s41598-018-22081-7 20 Aksoy SBBWardALittlePFWeinshilboumRM

You might consider wearing sterile gloves

& Verdin, E

This stack is practitioner-guided
