Oat food has the function of reducing blood fat and serum cholesterol, and has important effects on preventing and treating cardiovascular and cerebrovascular diseases and diabetes. Among them, the active ingredient with health care function is in oat β- beta glucan.

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(1) β- Glucan can reduce the absorption rate of fat and cholesterol in small intestine, thus reducing serum cholesterol; In addition, β- Glucan can also reduce the absorption of carbohydrates in the small intestine.

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(2) β- Glucan binds with bile acids in the small intestine, which increases the excretion and synthesis of bile acids, thus accelerating the conversion of cholesterol to bile acids;

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(3) β- Glucan can produce short chain fatty acids by microbial fermentation in colon, which can inhibit the synthesis of cholesterol.

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There are also studies that suggest that, β- beta glucan can regulate the blood glucose level, hormone response, biological effects of vitamins and minerals, and has a positive effect on the prevention of colon cancer. β-beta glucan is a low calorie food. It is not easy to digest and absorb by human body after eating. It can slow down the increase of blood glucose and prevent and control obesity, diabetes and cardiovascular diseases. And because β- beta glucan has the property of water absorption and expansion. After eating, it can absorb water and expand in the stomach to produce a sense of satiety and prevent excessive diet. In addition, it can promote the intestinal peristalsis in the intestine, has a penetration effect in the colon, prevents constipation, shortens the time of waste passing through the intestine, reduces the pollution of intestinal carcinogens to the intestine, and achieves the anti-cancer effect. In the mouth, β- beta glucan can't be decomposed by bacteria producing dental caries to produce acid and corrode enamel, which has the function of preventing dental caries.