What is the condition in which the concentration of hemoglobin is below normal levels?

The condition in which the concentration of hemoglobin is below normal levels is called anemia. This can result from various factors, including nutritional deficiencies (like iron, vitamin B12, or folate), chronic diseases, or genetic disorders. Symptoms may include fatigue, weakness, and pale skin. Treatment typically focuses on addressing the underlying cause and may involve dietary changes, supplements, or other medical interventions.