Anemia is a condition characterized by an insufficient number of healthy red blood cells or hemoglobin to adequately deliver oxygen to the body's tissues and organs. This state is defined by red blood cell count, hemoglobin levels, or the total red blood cell volume in the blood falling below normal ranges. Common symptoms include fatigue, pale skin, shortness of breath, dizziness, and a rapid heartbeat.

Primary causes of anemia include inadequate red blood cell production and deficiencies in critical vitamins and minerals such as iron, vitamin B12, and folate. Anemia may be diagnosed when hemoglobin levels in the blood drop below 130 g/L for men, 120 g/L for women, and 140 g/L for newborns.

While anemia can affect both men and women, iron-deficiency anemia is particularly prevalent among young women due to blood loss experienced during menstrual cycles. Anemia can be temporary or chronic; however, it is generally manageable and its symptoms can be alleviated through medication, dietary adjustments, and other medical interventions.