should b12 be injected subcutaneously or intramuscularly How to Inject Vitamin Vitamin C and B12 Injection

Summary: Feeling worse after a B12 injection typically reflects your body adjusting to replenished vitamin levels, triggering metabolic processes that may temporarily cause fatigue, headaches, or injection site discomfort

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Are there any potentially harmful side effects or safety considerations with vitamin B12 injections

I love my B-12 Kit, my order arrived quickly, very pleased