There is no such thing as a three-flavored herbal formula for lowering blood sugar, but depending on the type of diabetes, you can use Mai Wei Di Huang Tang, Quenching Thirst Formula, Jade Maiden Decoction, and Qi Wei Bai Shu San. Diabetes mellitus belongs to the category of “thirst-quenching disease” in traditional Chinese medicine, and the asymptomatic period usually has no prominent clinical symptoms, but under stressful circumstances, blood sugar may rise significantly, and urine sugar may appear, etc., which can be treated with the addition of Maiwei Dihuang Tang. If the symptoms are dry mouth and tongue, thirst and excessive drinking, frequent urination, etc., then it belongs to the evidence of lung-heat-toxin injury (there is heat in the lungs, which continues to deplete the body’s fluids), and it can be treated with the addition or subtraction of the Thirst-Quenching Formula. If the symptoms are excessive thirst and urination, frequent eating and hunger, dry stools, etc., then it belongs to the syndrome of stomach heat, and can be treated with the Jade Maiden Decoction plus or minus. If the symptoms are thirst leading to drinking, lack of energy, ability to eat and loose stools (thin and unformed stools), or reduced diet, body thinness, weakness of limbs, etc., then it belongs to the syndrome of deficiency of qi and yin, and can be treated with the addition or subtraction of Seven-flavored Atractylodes Macrocephalae Powder. Please do not use medication on your own. If you have diabetes mellitus, please go to the hospital to be diagnosed and treated by a specialized doctor.