This is because the abdomen generally has higher blood flow to the subcutaneous tissue, pulling medication into systemic circulation faster
For example, look for "methylfolate" instead of "folic acid" or "methylcobalamin" instead of "cyanocobalamin." These methylated forms are generally easier for your body to absorb and utilize immediately
B12 injections are especially useful for people with a B12 deficiency, which tends to stem from difficulties absorbing the nutrient, not falling short nutritionally, says Foxx
That's where treatments like injectable B12 for humans come into play
Possible Side Effects Potential side effects include: Nausea Vomiting Diarrhea Headache Fatigue Weakness Loss of appetite A tingling sensation in the feet or hands Redness, swelling, or bruising at the injection site In the event you feel you are in imminent danger or have signs of an allergic reaction, you should contact emergency services immediately