Portulaca oleracea is an annual succulent herb, which has been used by China people for thousands of years. It is also recognized as a "medicine and food homologous" plant in the fields of medicine and food, and it is also a wild vegetable that ordinary people like to eat. Portulaca oleracea is distributed in the north and south of China. Portulaca oleracea, as a Chinese herbal medicine, is shabby and has the effect of clearing away heat and toxic materials. It is mainly used for preventing and treating enteritis, dysentery, hemorrhoid, erysipelas, verruca plana, and expelling parasites and toxins. Studies on Portulaca oleracea L. in recent years show that Portulaca oleracea L. is a valuable medicinal material and a natural green vegetable in terms of pharmacological action and edible health care function. Its stems and leaves contain a very important nutrient for human body: "SL3- fatty acid", which is an important component to form cell membranes, especially those of brain cells and eyes. It also contains vitamin E and carotene, both of which are natural antioxidants. They can effectively prevent the damage caused by free radicals to human tissues, and have the functions of anti-aging, preventing coronary heart disease, preventing cancer and obesity.

(1) to treat intestinal diseases. The experiments of Chinese researchers have proved that Portulaca oleracea juice has obvious bactericidal effect on Shigella dysenteriae, its decoction also has inhibitory effect on Salmonella typhi and Escherichia coli, and Portulaca oleracea extract also has inhibitory effect on some pathogenic fungi to varying degrees. In recent years, purslane has been found to have new effects in preventing and treating bacillary dysentery, enteritis and dysentery carriers, treating skin furuncle and purulent diseases, and treating simple diarrhea in children.

(2) Prevention of cerebral thrombosis. British researchers revealed that purslane leaves contain a lot of ω-3 series unsaturated fatty acids, which is called "brain gold". Omega-3 fatty acids have various pharmacological activities, which can increase prostaglandin, an anti-inflammatory substance synthesized by vascular endothelial cells, reduce thromboxane A2 formed by platelets, reduce blood viscosity and increase anticoagulant blood lipids, thus playing a role in preventing thrombosis. Prostaglandins are also inhibitors of platelet aggregation, which can dilate blood vessels.

(3) Enhance myocardial strength. Chinese researchers have found that purslane is rich in active substances such as levonorepinephrine, dopamine and dopa. Norepinephrine can stimulate vascular β-receptor, make blood vessels contract, raise blood pressure, increase coronary perfusion pressure and increase coronary flow. In addition, these substances can also stimulate the beta receptor of the heart, enhance myocardial contractility and cardiac automatic rhythm. Portulaca oleracea is quite unique in protecting the heart, so it is especially favored by the elderly. According to research, Portulaca oleracea L. is rich in unsaturated fatty acids that inhibit human plasma cholesterol and triglycerides, and can increase prostaglandin synthesized by vascular cells, reduce thromboxane A2, reduce blood viscosity, prevent platelet aggregation, coronary artery spasm and thrombosis, thus effectively preventing coronary heart disease. In addition, it contains a lot of effective components in potassium and omega-3 fatty acids, which can lower blood pressure, inhibit myocardial excitability, slow down heart rate and protect the heart.

(4) lowering blood pressure and blood sugar. China researchers identified purslane.

It is rich in potassium, including potassium nitrate, potassium oxide and potassium sulfate. According to the determination, the content of potassium in Portulaca oleracea is 65438 0.7%. Potassium has a certain antihypertensive effect, has an important physiological effect on myocardial excitability, and can directly inhibit myocardial contractility. After taking a proper amount of potassium from Portulaca oleracea, potassium ions entering the blood can directly act on the blood vessel wall, dilate the blood vessel wall and prevent the blood vessel wall from thickening, thus providing effective help for reducing the incidence of hypertension and stroke. It is recorded in ancient Chinese medicine books that purslane has the function of quenching thirst. In the mid-1960s, American scientists discovered that purslane contained high concentrations of norepinephrine and dihydroxyphenylethylamine (precursors of norepinephrine). Experiments with diabetic rats and rabbits show that both water-soluble and fat-soluble extracts of Portulaca oleracea can prolong the life of diabetic rats and rabbits. Pharmacological studies have proved that norepinephrine in Portulaca oleracea can promote insulin secretion from islets and regulate the process of glucose metabolism in human body, thus achieving the effect of lowering blood sugar. It is reported that some people use purslane fresh water to cook rice and treat many diabetic patients, and the results are effective. All these indicate that the "thirst quenching" treatment of Portulaca oleracea has certain basis and is worth further study.

(5) Protect gastric mucosa. Researchers in China confirmed that 10% ethanol extract of Portulaca oleracea L. has a significant therapeutic effect on gastric ulcer caused by gastric mucosal injury. In the experiment of intraperitoneal administration in mice, Portulaca oleracea extract was administered at the dosage of 100, 200 and 400mg/kg, which could inhibit the gastric mucosal injury caused by non-steroidal anti-inflammatory drugs (indomethacin and phenylbutazone). Researchers believe that this new effect of Portulaca oleracea may be related to its rich ω-3 fatty acids and vitamin C, which have strong antioxidant effects and can protect gastric mucosa.