any side effects to b12 injections Feeling worse after Injection: Answering concerns What Does a B12 Shot

People with low B12 may experience: Persistent fatigue or low energy Weakness Brain fog, concentration issues, or memory changes Low mood or irritability Pins and needles, numbness, or nerve-type sensations Mouth ulcers or a sore tongue Paleness or shortness of breath (if anaemia is present) Some symptoms can become more serious if deficiency is prolonged, particularly neurological symptoms

This aggressive start is important for those with big deficiencies

What is the standard intramuscular dosing protocol for vitamin B12

So, when can you expect B12 injections to start working

The most common side effect is simply pain at the injection site