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Common side effects include, but may not be limited to: pain or redness at the injection site mild diarrhea pruritus (itching) increased swelling joint pain dizziness headache nervousness or anxiety Serious side effects may include: allergic reactions peripheral vascular thrombosis hypokalemia (low potassium levels) pulmonary edema (fluid build-up around or in the lungs) thrombocytosis congestive heart failure There have been reports of anaphylactic shock and death after the parenteral administration of vitamin B12
Unless the body is deficient, B12 injections are unlikely to increase energy levels or improve performance
A positive Intrinsic Factor Antibody (IFA) test is the smoking gunit confirms the problem is autoimmune
We advise readers who purchase our B12 product to inject SQ, because IM shots can be painful and may discourage self-injection
And what is the shelf life of each bottle after using it for the first time
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