What is fat - George Zaidan-【医学科普】什么是饱和脂肪和不饱和脂肪？哪种对人体有害？

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• 彩云卷:Bad: saturated fat, trans fat(look for partially hydrogenated) good: unsaturated fat
• VaYoVa:As it turns out, the amount of fat we eat doesn't impact our weight or our cholesterol or a risk of heart disease, nearly as much as what kind of fat we eat. But let's backup. what is fat? If we were to zoom in on a salmon, Which is a fatty fish, passed the organs, passed the tissues, into the cells, we would see that the stuff we call fat is actually made up of molecules called triglycerides. And they are not all alike. Here's one example, those three Carbons on the left, that's glycerol. and you can think of that as the backbone that holds the rest of the molecule together. The three long chains on the right are called fatty acids, and it's subtle differences in the structures of these chains that determine whether a fat is, let's say solid or liquid,whether or not it goes rancid quickly. And most Importantly, how good or how bad it is for you. Let's take a look at some of these differences, one is length fatty acids, can be short or long.
• 绿鸭蛋:健康度排名：不饱和脂肪（cis正式）>饱和脂肪>不饱和脂肪（trans反式）
• VaYoVa:Another more important difference is the type of bond between the carbon atoms. Some fatty acids have only single bonds, others have both single and double bonds. Fatty acids with only one bonds are called saturated. And those with one or more double bonds are called unsaturated. Most Unsaturated fats are good for you, while saturated fats are bad for you in access.
• 请叫我小吴大人:另一个更重要的区别是碳原子之间的键的类型。有的脂肪酸只有单键，有的既有单键又有双键。只有一个键的脂肪酸叫做饱和脂肪酸。那些有一个或多个双键的叫做不饱和的。大多数不饱和脂肪对人体有益，而饱和脂肪则对人体有害。