Bitter tenuifolia lettuce foliage upright leaves were tenuifolia shape, margin of gear-shaped, leaf green to yellow-green coloration. It can be eaten raw, fried or rinsed. The taste is crisp and tender, fragrant and delicious, and has the effect of clearing heat and detoxifying. According to research, lettuce contains high dietary fiber and vitamin C, which is beneficial to remove excess fat from the body. The lettuce and mannitol in its stems and leaves can relieve pain and hypnosis, lower cholesterol, assist in the treatment of neurasthenia, and clear the liver and promote gallbladder. , diuretic, to promote blood circulation. In addition, there is an “interferon inducer” in lettuce, which can stimulate normal human cells to produce interferon, thereby producing an “antiviral protein ” to inhibit the virus.