日本卡戈梅综合研究所通过动物实验发现，花椒、月桂树和柿树叶等物质有扩张血管的作用，但是迄今还未发现发挥这种作用的特定物质。 　　据日本媒体报道，这家科研机构使用 130种蔬菜和植物进行实验，发现其中的花椒、月桂树、柿树叶、秋葵、茶叶等有扩张血管、降低血压的作用 Japan Animal Science Research Institute through the animal experiments found that pricklyash, laurel and persimmon leaves and other substances have the role of dilation of blood vessels, but so far we have not yet found a specific substance to play this role. According to Japanese media reports, the research institute used 130 kinds of vegetables and plants to experiment and found that the pepper, laurel, persimmon leaves, okra and tea have the function of dilating blood vessels and lowering blood pressure