One of the most common side effects that people experience from cutting red meat out of their diet is low iron. Red meat is one of the most effective ways to maintain a normal iron level within the body. Often if people are not careful and do not undertake the proper measures to keep up their iron level after eliminating red meat, they will become anemic. Anemia occurs when there is a low level of hemoglobin or red blood cells in the body. Low levels of iron prevent the body from producing enough hemoglobin which ultimately diminishes the amount of oxygen the red blood cells can carry. Common side effects of anemia are tiredness and weakness. Meat is a good source of iron and will help to prevent iron deficiency anemia.