Fruits can have a remarkable therapeutic effect. For example, haws can dilate blood vessels, lower blood pressure and blood cholesterol level, improve the heart function, inhibit and kill bacteria and improve the digestion. According to pharmacological studies, haws contain many flavone glycosides and complicated di- or polyflavanoids. The toxicity of polyflavanoids is low, and it can produce an apparent hypotensive and cordial effect. Flavone and derivatives of flavanoid can dilate coronary arteries and produce a sedative effect.
The fresh fruits and leaves of haws contain the precursor of diflavanoid, anthocyanidin, and catecuric acid and anthocyanidin may be produced after hydrolysis to improve contraction of the myocardium, increase blood flow in the coronary artery and prevent arrhythmia.
According to in vitro bacteriostatic experiments, haws can produce a strong inhibitory effect on Flexner's and Sonne Bacillus of dysentery, Bacillus proteus, Bacillus coli and Bacillus pyocyaneus. Recently, it has been discoveredthat haws can increase secretion of amylase and lipase in the stomach, and promote digestion.
Apples can both stop diarrhea and promote bowel movement. Mild diarrhea (except bacillary dysentery) can be stopped a few days after the intake of apple paste alone. The organic acids and tannic acid in apples can produce an astringent effect, and the pectine and cellulose in apples can absorb bacterial toxin to stop diarrhea; but the organic acids and cellulose can stimulate intestine and promote the motility of the stomach and intestines to treat constipation.
According to clinical observations, the increase of urine sugar in diabetic patients after eating bananas is not as remarkable as after the intake of other fruits. The ratio of glucose and fructose in bananas is 1:1, making them suitable for treating fatty diarrhea and intoxic indigestion. The abundant minerals in bananas are useful for correcting the disturbance of water and electrolyte metabolism. The 5- serotonin in bananas can reduce gastric acid and protect gastric mucosa from the stimulation of gastric acid. However, the overeating of bananas may cause dysfunction of the digestive system.
Pears contain vitamin C, sugar, calcium, phosphorus and sodium, and they can be used with the correspondent specific medicines to treat pulmonary tuberculosis, acute or chronic bronchitis and upper respiratory infection with dryness and pain in throat, expectoration of profuse yellow sticky sputum and discharge of dark urine in short streams.
Ripe fruits contain more digestible sugar, like glucose, and are beneficial for the liver. Patients with liver diseases should eat more sweet fruits. Sour fruits, like plums, apricots, oranges and tangerines can cause spasms in the biliary tract, so patients with diseases of the liver or gallbladder should avoid eating sour fruits.
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