vitamin b12 injection reaction How Quickly Do You Feel Better After Injections? allergic reaction to vitamin b12

Its required for proper absorption of B12

Summary: Excessive vitamin B12 intake rarely causes toxicity, but very high levels from supplements or injections may be associated with skin reactions such as acne-like eruptions, though serious adverse effects remain exceptionally uncommon

They include pain or redness at the injection site, slight swelling or tenderness, mild diarrhea, and sometimes itching or a generalized feeling of body swelling

This could also be because Im only on the initial dose

These treatments may help people lose weight and control certain health problems more effectively than with diet and exercise alone