South African leaf is bitter, cool, and enters the blood, and has a clearing and cooling effect on the blood, which can treat sore throat and fever caused by external wind-heat, as well as itchy skin, heavy at night, and nosebleeds caused by blood-heat delusion. South African leaves contain active ingredients that can eliminate free radicals and have the effect of maintaining good looks. The usual love of greasy food can cause dampness and heat in the spleen and stomach, thus causing elevated blood lipids, which can harden the arteries, an important factor in hypertension; South African leaves can lower blood lipids, so it has a relieving effect on hypertension. Modern research has found that South African leaves have certain antibacterial effects and can treat diarrhea and dysentery. South African leaves contain dietary fiber, which can promote intestinal peristalsis and have a certain effect on habitual constipation.