1. Different properties: Lipids are natural macromolecular organic compounds widely existing in biological tissues. Lipid is one of the important nutrients needed by the human body, which supplies the energy and essential fatty acids needed by the body. Sterol is a kind of steroid, which contains hydroxyl groups. Lipids are the general names of oils, fats and lipids.

2. Different characteristics: Fat consists of three elements: C, H and O.. Fat is a triacylglycerol ester composed of glycerol and fatty acids. Sterols are all based on cyclopentane polyphenanthrene and contain hydroxyl groups. Lipids are soluble in nonpolar solvents such as ether, chloroform, petroleum ether and benzene, but insoluble in water.

3. Different chemical structures: Lipids are not macromolecules, because the relative molecular mass is not as large as that of sugars, protein and nucleic acids, and they are not polymers. Sterol is a kind of cyclopentane polyphenanthrene derivative fused by three hexane rings and one cyclopentane.

Extended information:

Precautions for lowering cholesterol:

1. Eat more fish. A study on the effect of omega-3 fatty acids (found in tuna, mackerel, salmon and sardines) on hdl-c shows that when eating fish once a week or even once a day, it can effectively reduce the intake of saturated fat.

2. Eating foods rich in fiber, whole grains, bread and other foods with very high fiber content can effectively reduce the ldl-c content in human body. In order to achieve the effect of affecting cholesterol content, the fiber in the diet must reach 15-3 grams, and a plate of blackberries can be added to breakfast and half a bowl of lentils can be added to lunch.

3. Eat more soybean products, such as tofu and puffed vegetable protein, which contain a natural phytochemical, which helps to remove ldl-c from the human body.

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