Longan flower belongs to the Sapindaceae family. It has astringent taste and flat nature. In terms of function, it has the effect of strengthening the kidney, and it is also helpful for kidney disease, diabetes, red belt and leucorrhea. Modern studies have shown that longan flower contains two components, proanthocyanidins and catechins, after extraction with alcohol and hot water, which has a very good effect on scavenging free radicals and has a great antioxidant effect. It also has strong reducing power and the ability to chelate ferrous ions; in many systems that simulate human body oxidation, it has an antioxidant capacity much higher than that of ordinary natural products, and the longan flower extract is also quite effective in fighting inflammation, which proves that longan flower is a kind of A natural product with great health benefits.
 
 The longan flower used by PremiOne is cultivated by small farmers in Taiwan using organic planting methods. No pesticides are sprayed.