Normal adult stools are yellowish-brown in color, and this color is generally indicative of the healthiest condition. Depending on the type of food, the state of the digestive organs, and the amount of food eaten, the feces appear different colors. 1. Food type: When the body consumes too much chlorophyll, the feces will be affected by chlorophyll and appear yellowish green. Eating more food with high fat content, the feces become light yellow. After consuming excessive animal blood and offal, the feces become black in color. And consuming a large amount of dragon fruit pigmented food will cause the color of feces to change according to the food. 2. The state of digestive organs function: weak digestive ability, the color of feces decreases and becomes light. If digestion is strong, the color of feces will increase and become darker. 3. Amount of food intake: The change of fecal color mainly depends on the bilirubin in the bile, and the amount of bilirubin discharged depends on the amount of food intake per day. Therefore, if you eat less, the color of your stool will be light, and if you eat more, the color will be dark. There may also be other reasons for the change of stool color. Patients who feel unwell should go to the hospital as soon as possible to find out the cause of the disease and then under the guidance of the doctor for treatment.