Portulaca oleracea is a commonly used Chinese herbal medicine and it is also a kind of wild vegetable that ordinary people like to eat. It is also recognized as a medicine and food homologous plant by the medical community and the food industry. It is better to use fresh ones. Because purslane can be eaten as a vegetable, even if it is used in large amounts, it is safe. Therefore, it is worth paying attention to.
Many experiments have shown that purslane juice has a significant bactericidal effect on Shigella, and its decoction also has an inhibitory effect on Salmonella typhi, Escherichia coli, etc., and purslane extract has different inhibitory effects on certain pathogenic fungi. . In recent years, people found that purslane has the following new functions.
1. Improve myocardial function. Purslane is rich in active substances such as L-noradrenaline, dopamin and dopa. Norepinephrine can activate vascular β-receptors, cause vasoconstriction, increase blood pressure, increase coronary perfusion pressure, and increase coronary flow. In addition, these substances can agonize the heart's beta-receptors and increase myocardial contractility and the heart's automatic rhythm.
2. Prevent thrombosis. British studies revealed that this is mainly purslane leaves containing a large number of omega-3 series of unsaturated fatty acids (known as "brain gold", mostly found in seafood), omega-3 fatty acids have a variety of pharmacological activities, can make the vascular endothelium The increase in prostaglandins, an anti-inflammatory substance that is synthesized in cells, reduces platelet thromboxane A2, decreases blood viscosity, and increases anticoagulant lipids, thereby preventing thrombosis. Prostaglandins are also inhibitors of platelet aggregation and can strongly dilate blood vessels. At the same time, the active ingredients in omega-3 fatty acids also have the effect of inhibiting or eliminating the production of cholesterol and triglycerides in the serum, and have lipid-lowering and cardioprotective effects.
3. Buck effect. Potassium is rich in potassium, including potassium nitrate, potassium oxide, potassium sulfate and so on. It was determined that the potassium content in purslane reached 1.7%. Potassium has certain antihypertensive effect, has important physiological effects on myocardial excitability, and can directly inhibit myocardial contractility. After taking appropriate amount of potassium from purslane, the potassium ions that enter the blood can directly act on the blood vessel wall to expand the blood vessel wall and prevent the thickening of the wall of the blood vessel, thereby providing a reduction in the incidence of stroke in hypertension. Effective help.
4. Hypoglycemic effect. Ancient Chinese medicine once contained, purslane has a "diabetes" role. In the mid-1960s, American scientists discovered that purslane contained high concentrations of norepinephrine and dihydroxyphenylethylamine (a precursor of norepinephrine). Experiments with diabetic rats and rabbits showed that both water-soluble and fat-soluble extracts of purslane can prolong the lifespan of diabetic mice and rabbits. Researchers have demonstrated through pharmacological studies that norepinephrine in purslane can promote insulin secretion from the islets and adjust the process of sugar metabolism in the human body so as to achieve hypoglycemic effect. It has been reported that some people use fresh purslane to cook and treat multiple diabetics. All of the results are valid. This shows that the treatment of Diabetes by the purslane is based on certain grounds and deserves further study.
5. Protect the gastric mucosa. Recently found: 10% alcohol extract of purslane has a significant therapeutic effect on ulcers caused by gastric mucosal injury. The investigators' intraperitoneal administration of the test in mice confirmed that purslane extract was administered at 100, 200 and 400 mg/kg body weight to inhibit non-steroidal anti-inflammatory drugs (indomethacin and phenylbutazone). Gastric mucosal injury. Researchers believe that the new efficacy of purslane may be related to its rich omega-3 fatty acids, vitamin C, etc. These substances have a strong anti-oxidant effect and protect the gastric mucosa. People with chronic gastritis or gastric ulcer may wish to eat some purslane.
6. Beauty, weight loss. Studies have shown that purslane is rich in vitamin C (23mg/100g), vitamin E (12.2mg/100g) and dietary fiber, pectin, minerals and so on. Among them, vitamin C and vitamin E are strong antioxidants and have anti-aging effects. In addition, vitamin C has a certain role in the elimination of pigmentation, and vitamin E can protect the mitochondria of phospholipids, anti-free radicals, is a beauty to share. Purslane has a high content of copper (21ug/100g), and copper ions in the body are an important part of tyrosinase. The lack of purslane can lead to decreased melanin production, resulting in increased white hair. Therefore, eating purslane can increase the density of black cells in the epidermis and the activity of related enzymes, making black hair white. "Compendium of Materia Medica" records: "Portulaca oleracea can be fat and intestines, it is not to eat." Studies have confirmed that purslane is rich in nutrients, but it contains very little calories. Today, it is regarded as a typical diet food, which has a very good effect on the prevention and treatment of obesity and other diseases.
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