There is Lycium barbarum in Shennong's Herbal Classic, the first book of China's Materia Medica, and it was awarded the "top grade". Li Shizhen, a famous medical scientist in Ming Dynasty, also described Lycium barbarum in detail in Compendium of Materia Medica, recording that Lycium barbarum in Ningxia is delicious and ruddy, and it is the best of Lycium barbarum. The main function of Lycium barbarum is to nourish liver and kidney and benefit eyes; Used for wasting, wasting and soreness of waist and knees; Dizziness, tinnitus, internal heat, thirst, blood deficiency, sallow complexion and blurred vision. Health-preserving physicians and medical scientists of all ages have attached great importance to the nourishing function of Lycium barbarum. As early as "Shennong Materia Medica Classic", it was pointed out that long-term service strengthens bones and muscles; The Record of Famous Doctors records that Lycium barbarum is good at "nourishing essence"; Herbal dietotherapy also records that Lycium barbarum "can benefit people and get rid of waste" Lycium barbarum L. has the functions of nourishing liver and kidney, benefiting the purpose, and is highly praised by doctors and dietotherapy in past dynasties, and is also a commonly used tonic for most families. It is the first batch of two medicines and foods published by the people and the Ministry of Health of China. It has enjoyed a high reputation since ancient times, both at home and abroad! Chinese medicine believes that Lycium barbarum can nourish liver and kidney, benefit eyesight, enrich blood and enhance human immunity. For modern people, the most practical function of Lycium barbarum is to resist fatigue and lower blood pressure. In addition, Lycium barbarum can protect liver, lower blood sugar, soften blood vessels, and reduce the levels of cholesterol and triglyceride in blood, which has certain curative effect on patients with fatty liver and diabetes. According to clinical medical verification, Lycium barbarum can also treat chronic renal failure. Many people don't know that eating Lycium barbarum often can help beauty beauty. This is because Lycium barbarum can improve the ability of skin to absorb oxygen, in addition, it can also play a whitening role. Although Lycium barbarum has a good nourishing and therapeutic effect, it is not suitable for everyone. Because its warm-up effect is quite strong, people with colds, fever, inflammation and diarrhea had better not eat it. The people who are most suitable for eating Lycium barbarum are people with weak constitution and poor resistance. And we must persist for a long time, and eat a little every day to be effective. Don't overdo any tonic, and Lycium barbarum is no exception. Generally speaking, it is more appropriate for healthy adults to eat about 20 grams of medlar every day; If you consider the effect of treatment, it is best to eat about 30 grams a day. Now many animal experiments about the toxicity of Lycium barbarum prove that Lycium barbarum is a very safe food, which contains no toxin and can be eaten for a long time.