Acne is a chronic inflammatory disease of the sebaceous glands of hair follicles. Acne occurs due to a combination of factors, the main causes of which include increased sebaceous gland secretion, blockage of follicular sebaceous ducts, and microbial infections such as bacteria. Therefore, the treatment of acne should start from the above links, specifically by reducing sebum secretion, unblocking hair follicle sebaceous ducts, antibacterial and other treatments. Food intake can affect sebum secretion. Therefore, dietary choices are important for acne sufferers. The following is an introduction to a concept – Glycemic Index (GI.) CI translates to glycemic index. A low GI diet can prevent the glycemic load from being too high, prevent the body from raising insulin levels too quickly, and prevent insulin from directly or indirectly triggering sebum secretion. A low GI diet prevents acne by reducing sebum secretion. Therefore, it is best for acne patients to avoid high GI foods, to consume medium GI foods appropriately, and to consume more low GI foods. Specific food GI classification: I. Low GI foods (GI value less than 40) 1. vegetables: spinach, cauliflower, eggplant, bitter melon, cucumber, bean sprouts, kelp, white radish, tomatoes, string beans; 2. milk and eggs: whipped cream, cheese, milk, eggs; 3. soy products: oil tofu, tofu, mao beans, cashew nuts, peanuts, almonds; 4. fruits: cantaloupe, peaches, cherries, apples Kiwi, orange, strawberry, papaya, sage fruit. Medium GI foods (GI value 40-70) 1, staple foods: rice, oats, buckwheat noodles, whole wheat noodles, glutinous rice, germ rice, brown rice flakes, noodles; 2, vegetables: leeks, pumpkin, corn; 3, fish and meat: pork, lamb, beef, bacon, chicken, ham, squid, fish, shrimp; 4, fruits: mango, raisins, pineapple, bananas; 5, beverages: wine, beer, cola 6. snacks: pudding, jelly, ice cream. High GI foods (GI value greater than 70) 1, staple foods: white rice, fried rice, French bread, udon noodles, ramen; 2, vegetables: potatoes, yams, carrots; 3, fish and meat: flower branch pill, tribute pill, fish plate, egg dumplings, fatty intestines, pork belly, tripe; 4, sugar sauce: strawberry jam, rock sugar, brown sugar, maltose, white sugar; 5, snacks and treats: chocolate, donuts, milk sugar, potato chips, cakes, muffins, red beans. cakes, muffins, red bean paste, cookies.