where to inject b12 subcutaneously Injecting into fat: 4 body areas that work best B12 Injections at Home -

That figure of 1% being passively absorbed is just a little too convenient for my liking

Mild side effects and potential risks, which should be referred to a doctor if they persist or worsen, include: pain, redness, or itching at the site of the injection mild diarrhea swelling sensation in the body More serious side effects, which require immediate medical attention, include: muscle cramps irregular heartbeat unusual weakness or tiredness swelling of the ankles or feet Severe reactions are very rare but require emergency intervention

B12 vitamin shots may cause pain at the injection site, mild diarrhea, and swelling

In such cases, 1000 mcg of B12 is injected into the area, often preceded by a numbing agent such as thiamin or lidocaine