body may have to work harder to deliver oxygen. This can lead to shortness of breath, rapid heartbeat, palpitations, chest discomfort, or reduced exercise tolerance.
These symptoms should not be ignored, because they can also be signs of heart or lung problems. If chest pain, fainting, severe shortness of breath, or sudden weakness occurs, seek urgent medical help.
10. Digestive Problems
Some people with vitamin B12 deficiency may experience digestive symptoms such as nausea, loss of appetite, diarrhea, constipation, or weight loss. Mayo Clinic lists stomach problems among symptoms that
