Grown mainly in southern Europe, bitter orange, also known as bigarade, is a fruit native to China. In TCM, Zhi shi refers to the fruit picked before maturity and dried in the sun.

Zhi shi is a digestive tonic: it stimulates appetite and promotes the passage of the food bolus. Thus, it participates in the proper operation of the digestive system and relieves the discomforts associated with difficult digestion (abdominal cramps, diarrhea, lack of appetite ...). It is a natural solution to come to an end of the digestive disorders and to find the gastric comfort.