Learning nutrition requires knowing one key word: energy. Energy, originally a word full of power, has become calories, reminiscent of fatness. Adult men need 2,200 kcal a day, women 1,800. we now have the same genes as 10,000 years ago in the Paleolithic era, a gene characterized by the storage of energy to prevent running out of food. And not the same situation is that we now eat more, move less, the basal metabolic rate is low, so that more energy will come out, stored in the form of fat (fat), fat paper is fresh out of the oven. 7 major nutrients inside, only carbohydrates (1 gram provides 4 kcal), protein (1 gram 4 kcal), fat (1 can 9 kcal) to provide energy, water, vitamins, minerals, dietary fiber these 4 do not provide any energy. So, fat is terrible, 2 times more energy, most likely to lead to obesity. In addition, some mushrooms will say, I drink water are fat. I can responsibly say that this mushroom is a cheat paper. Only a nuclear power plant can make water release energy, our body can not do “love to drink water full”. The real situation is that the girl accidentally ate a drink containing sugar and fat, which contains a lot of energy, resulting in fat. For example, nutrition fast 500ml, 996 kJ (239 kcal), 2 bowls of rice (100g a bowl) of calories, you need to jog for 30 minutes to consume. Let’s start with the bad side of fat. Yesterday a friend said that fat is not that terrible. Well, let me finish its awfulness first. (1) fat accumulation, causing obesity, placed in the Tang dynasty Yang Yuhuan era is okay, today’s Chinese society’s aesthetic considered unattractive. Many women also have a strong anxiety, shouting every day to lose weight. However, a more professional point of view, someone fat, someone thin, someone tall, someone short, someone with hair, someone without hair, this is called biodiversity, can make the world colorful. If you are born with it, just accept it happily. (2) fat accumulation, easy to cause cardiovascular and cerebrovascular diseases. Obesity is divided into duck pear type and apple type. The duck pear type is the buttocks is big, the ancient belief that the buttocks is big, good birth. The standard of good breeding: the sky is full, the earth is square, there is a balcony in front and a garden behind. The balcony garden is the meaning of rich breasts and fat buttocks. Apple-shaped is a large stomach. The longer the waistline, the shorter the life expectancy. Apple-type obesity, the most likely to high blood pressure, diabetes, easy to stroke in old age. Now the really rich people, is 40 years old, still have a flat stomach. (3) fat accumulation, easy to cause infertility. Nutrition has an indicator, body mass index (BMI) = weight (kg) / height (m) 2, the normal value is 18.5-23.9, the value is too high and low are not easy to get pregnant. The reason is that the essential fatty acids in fat are the raw materials necessary for the synthesis of estrogen. Too much and too little can be a problem. After saying that fat has a lot of bad effects, let’s talk about its benefits. (1) Fat stores energy. Only 2% of carbohydrates are stored in the form of liver glycogen and muscle glycogen, which can barely store energy. Fat, on the other hand, can store a lot of energy. This is the human self-protection mechanism, when there is no stable food source, eat more, in the form of fat to save for a rainy day. The most famous example is the 08 Wenchuan earthquake, there is a strong pig, only water, no food, boiled 36 days. 150kg, came out into 50kg. can survive, relying on the fat. I used to work in the ICU (intensive care unit) and found that patients who had meat had a much better chance of surviving the difficult times, and the incidence of bed sores was lower. (2) Fat keeps you warm. More fat, not afraid of the cold. Polar bears run around without clothes in the freezing temperatures of minus tens of degrees Celsius, what is the reason? The subcutaneous fat is thick. (3) Fat is soft. The hips have it, not afraid to sit on a hard bench, the meeting has endurance. Chest with it, in the pale sea of people, there are a pair of proud breasts flying. The internal organs have it, less friction between organs and organs, and less chance of hidden pain in the internal organs. (4) Good fat taste. In many Cantonese restaurants, lard (lard residue) is used to stir-fry green vegetables, and the taste is irresistible. Pure milk also tastes better than skimmed milk. (5) fat manufacturing estrogen. Girls are too thin to get their periods, and menstrual disorders are very serious. So, the ancient aesthetic standard for women was that the pearly whites. Today, it still seems incredibly true.