Fast heart rate
Speaking of a fast heartbeat, a rapid heart rate combined with shortness of breath are symptoms of vitamin B12 deficiency. Your heart might start to beat faster to make up for the reduced number of red blood cells in your body.
Anemia puts strain on the heart to drive a higher volume of blood around the body and to do it faster. This response is your body’s way of attempting to ensure that a sufficient amount of oxygen circulates through all of the body’s systems and goes to all the organs.
Fatigue
Megaloblastic anemia because of vitamin B12 deficiency in older adults might lead to a person feeling exhausted all the time. Without enough red blood cells to transport oxygen around the body, you’ll likely feel extremely tired constantly.
