Low hemoglobin levels, also known as anemia, can be caused by a variety of factors. Hemoglobin is a protein found in red blood cells that helps to carry oxygen from the lungs to the body’s tissues. When hemoglobin levels are low, the body’s tissues may not receive enough oxygen, leading to symptoms such as fatigue, shortness of breath, and paleness. Some common causes of low hemoglobin levels include blood loss, malnutrition, and certain medical conditions such as kidney disease or cancer. In some cases, low hemoglobin levels can be treated by making dietary changes, taking supplements, or receiving blood transfusions. It is important to speak with a healthcare provider for proper diagnosis and treatment of anemia.