Fluid buildup in the lungs, which can result in shortness of breath and pain while breathing, or coughing up foamy mucus
Deficiencies can occur with medical conditions such as atrophic gastritis (which causes thinning of the stomach lining), pernicious anaemia, Crohns disease, celiac disease, lupus, or other immune system disorders and certain medications
Theyre often called energy-boosting injections because B12 participates in energy production inside cells
Anemia, characterized by pale or jaundiced skin, is another potential sign, as vitamin deficiency can affect red blood cell production
Age affects both absorption and utilisation of B12, with older adults often experiencing slower responses