Red poop is normal after eating red amaranth. Red amaranth is a vegetable rich in iron, calcium, and vitamin K. It can contribute to the growth of teeth and bones, and is beneficial in maintaining normal heart muscle activity and preventing muscle spasms. It also helps prevent and improve constipation. Red amaranth contains iron ions and phytochromes such as anthocyanins, which give red amaranth its red color. After eating red amaranth, the phytochrome and iron ions, if not fully metabolized, may appear in the feces, giving it a reddish color, which is normal. If the red stool is accompanied by fishy odor and other symptoms, the existence of pus and blood stool, fresh blood stool, dark red stool, etc., considering the possible existence of amoebic dysentery, bacillary dysentery, hemorrhoids, rectal cancer and other diseases, which is an abnormal phenomenon, it is recommended to recommend that we immediately seek medical treatment under the guidance of the doctor to carry out targeted treatment.