What is a common symptom of anemia caused by B6 or B12 deficiency?

Fatigue and weakness are common symptoms associated with anemia, particularly when it arises from deficiencies in vitamin B6 or B12. These vitamins play crucial roles in the production of hemoglobin, the protein in red blood cells responsible for transporting oxygen throughout the body. When there is a deficiency in these vitamins, the body may produce fewer red blood cells or produce cells that are not functional, leading to a reduced capacity to carry oxygen. This lack of oxygen can result in feelings of fatigue and weakness, as the body's tissues and organs do not receive the necessary oxygen to function optimally. Consequently, individuals with anemia frequently report low energy levels and an overall sense of exhaustion.

Other symptoms such as an increased heart rate may occur but are often secondary to the feeling of fatigue and weakness. Improved endurance and better oxygen transport are not typically associated with anemia resulting from these deficiencies, as both conditions suggest a well-functioning hematological health status, which is contrary to the impact of anemia.