Infertility Below are some of the signs and symptoms of vitamin B12 deficiency: Difficulty thinking and remembering Fatigue Heart palpitations Pale skin Weight Loss Infertility Numbness and tingling in the hands and feet Mood changes A sore tongue Low appetite Constipation The following risk factors can increase the chance of developing Vitamin B12 deficiency: High alcohol consumption Older age Pernicious anaemia Atrophic gastritis Helicobacter pylori infection Coeliac disease Crohns disease History of gastrointestinal surgery Following a plant-based diet Pancreatic insufficiency AIDS Some hereditary conditions that affect vitamin B12 absorption There are some possibly side effects of Vitamin B12 injections and these can include: Pain, redness, or itching at the site of the injection Mild diarrhea Swelling sensation in the body Temporary itching of the skin If anyone experiences difficulty breathing, hives, and swelling they need emergency medical help as they may be experiencing anaphylaxis which is a severe allergic reaction

A little snippy for no reason
Signs include: Hives or widespread rash beyond the injection site Swelling of face, lips, tongue, or throat Difficulty breathing or wheezing Rapid heartbeat Feeling faint or losing consciousness These symptoms require immediate medical attention
You can choose between the deltoid (upper arm) or the gluteal muscle (hip/upper buttock), depending on your comfort
In more rare yet severe cases, you may experience: Itching or a feeling of swelling all over the body Muscle cramps and weakness Upset stomach and urinary problems Swelling in the ankles or feet Unusual tiredness Irregular heartbeat or trouble breathing If these side effects occur, consult your healthcare provider before continuing B12/MIC