Anaemia is defined as the decrease in haemoglobin from normal values either by loss of red blood cells or deficit in production or both. Haemoglobin is the major transporter of oxygen. The variation in haemoglobin is therefore a factor in determining the cardiac output. This book begins by discussing the effects anaemia has on heart diseases. The book then continues to discuss the influence of iron deficiency anaemia and recovery on oxidative/antioxidant status; influence of iron deficiency anaemia on bone metabolism; sickle cell anaemia; anaemia in myelodysplastic syndromes; transfusion in chronic anaemia; the prevalence, risk factors and management with a focus on chronic kidney disease; strategy for treating anaemia in chronic kidney disease patients from the standpoint of iron utility; and parasitic anaemia.