1. Iron Taking an iron supplement can help to increase your blood count. You should also increase your intake of foods rich in iron, such as spinach and liver. 2. Vitamin C Vitamin C helps the body absorb iron from food. Lack of vitamin C prevents iron from food sources from being absorbed properly. Vitamin C-rich foods include all types of oranges, papayas, strawberries and grapes. Vegetables such as capsicum, broccoli, cabbage, tomatoes and spinach also contain vitamin C. 3. Vitamin B12 Vitamin B12 is needed to increase hemoglobin levels. You must have foods that contain enough vitamin B12 and folate. Meat and eggs are rich in vitamin B12.