Efficacy of Alnus cremastogyne essential oil The efficacy of Alnus cremastogyne essential oil has a medical effect on human beings, which was recorded as early as 3000 years ago. In ancient Egypt, perfume and vegetable oil were indispensable items in celebrations. According to Du Jin's research (1930), it is found that the leaves, flowers and stems of cypress and Platycladus orientalis in Taiwan Province Province contain natural components such as lignanol, lodinic acid, and fenduojing, which have the functions of calming autonomic nerves, diminishing inflammation, treating tuberculosis, diuresis and disinfection. Therefore, they are widely used in Japan's cosmetics and pharmaceutical industries.