Adolescent girls are overly concerned about their body shape and generally want to stay slim and be thin to be beautiful, so they resort to excessive dieting to make significant weight loss. At first, they reduce calories, but gradually they avoid foods containing high sugar and protein altogether, and at the same time increase exercise. Even though their weight has been reduced significantly, they are still dissatisfied with their body shape and continue to diet and exercise more. This situation should not be carried out blindly and single-mindedly, and should vary from person to person. Otherwise, it will be counterproductive and trigger a pathological state. It should be reminded that women who are entering their childbearing years need to accumulate sufficient amount of fat in order to fulfill the mission of having children. The amount of fat accumulated by women before the pregnancy period needs to be 22% of their body weight in order to conceive and reach 28% or more in order to have enough energy reserves to maintain the October pregnancy and 3 months of breastfeeding after delivery. Here is the advice: weight control should not take the form of dieting, strengthening exercise is the reasonable way to lose weight. Weight loss cannot be reduced by nutrition. Not to reduce the intake of food rich in protein, vitamins and various trace elements, even fat, should also maintain a daily intake of 60-80 grams. Only in this way can ensure that the organism maintains normal activity and keep the woman’s menstrual flow normal. The average person dieting for 4 days will cause endocrine disorders in the body and induce various hidden problems in the body. When a normal woman reaches puberty, the pituitary gland secretes a large amount of gonadotropin, which encourages follicle maturation, ovulation and menstruation. This gonadotropin is a glycoprotein, and long-term nutritional deficiencies and lack of protein can cause the pituitary gland to decline in function, with insufficient secretion of this hormone, prompting the ovaries and other genitalia to atrophy and diminish in function. In addition, the adipose tissue in the female breast, abdomen, greater omentum and long bone marrow can transform androgens into estrogen, so adipose tissue is an important extra-gonadal source of estrogen. Women must maintain enough fat in their bodies for their menstrual cycle to be normal. Otherwise, endocrine disorders, menstrual disorders, premature menopause, and even premature aging can occur. This is the reason for the aforementioned amenorrhea in girls. By the way, there are several reasons for menstrual disorders and amenorrhea: 1. endometrial adhesions or scars, irregular menstruation despite good ovaries; 2. ovaries do not secrete hormones, endometrium does not change, menstruation stops naturally, congenital ovarian dysplasia, premature ovarian failure, etc. This kind of closure is often accompanied by the phenomenon of feminine feature dysplasia or feature degeneration, such as breast flattening and genital atrophy. 3, changes in pituitary function can affect changes in ovarian function. Central nervous system including the brain and hypothalamus, command pituitary activities, indirectly control ovarian function. Obese people is a natural phenomenon of life, its genetic genes have a relationship with, but also with excessive diet, insufficient exercise, reduced energy consumption, neuropsychological factors and other related. Infant birth weight is related to maternal nutrition, children of diabetic mothers are more likely to be obese than children of non-diabetic mothers. Children 0 to 1 years old is the most sensitive period of fat cell proliferation, in addition to the fastest growth into adolescence. And once the formation of fat cells is difficult to disappear, has produced fat cells will not be reduced, the number of fat cells per person is different, general human body about 0.25 billion to 0.3 billion, and especially obese people up to 260 billion. Medically called. Metabolic syndrome. The definition of central obesity as the core, central obesity adopted waist circumference as the diagnostic criteria. Combined with elevated blood pressure, blood glucose, triglycerides, and/or reduced high-density cholesterol. Hypertension, hyperlipidemia and hyperglycemia are the most important risk factors for cardiovascular diseases. Foreign experts have called this cluster of multiple metabolic abnormalities in the same individual the X syndrome. ; Some scholars believe that the intrinsic mechanism of the syndrome is insulin resistance, also known as. Insulin resistance syndrome. ; In recent years it is called. Metabolic syndrome (MS). , has been adopted by WHO. The waist-to-hip ratio (WHR) of the human body, when other factors are constant, is generally between 0.67-0.80 in healthy unmarried women and between 0.85-0.95 in men. Each 0.05 increase increases the risk of MS (i.e., metabolic syndrome) by 3.35 times. Each 5 CM increase in waist circumference increases the risk by 1.87 times, each 10 mmHg increase in systolic blood pressure (SBP) can increase the risk by 1.52 times, and each 5 mmHg increase in diastolic blood pressure (DBP) corresponds to 1.44 times. Women in Europe and the United States have a waist circumference of more than 88 cm and men have a waist circumference of more than 102 cm; in China women with a waist circumference of more than 80 cm and men with a waist circumference of more than 90 cm are at risk for diabetes, dyslipidemia, cardiovascular disease and other diseases. The risk of hypertension and hyperlipidemia was significantly higher in male respondents with waist-to-hip ratio over 0.9 compared with those below 0.9, and increased with weight. The optimal waist-to-hip ratio for women is 0.7, and the higher the waist-to-hip ratio at menopause, the greater the risk of breast cancer, and the higher the risk if one is overweight or obese. It is important to note that cholesterol is not something that is completely harmful to the body: first of all it is a natural component of food, a type of lipid. Most of it is naturally synthesized by the body and part of it is absorbed through the diet. Animal foods such as beef and lamb, eggs, and animal offal contain animal cholesterol. Plant flour, beans contain gluten sterols or soy sterols. Fungus fungus, mushroom, and seaweed contain ergosterol. Secondly, cholesterol is essential for the human body. It is an important component of cell membranes and plays an important role in maintaining the normal function of cells; it maintains human metabolism and is an important substance to prevent aging and prolong life; it is one of the components of brain cells and is a nutrient for brain cells, the lack of which will cause dementia in children and memory loss in the elderly. Without it, sex hormones cannot be synthesized, and people will be male or female. Therefore, in this sense, the elderly, children and pregnant women should be moderately high. Thirdly, cholesterol has to be combined with lipids to be stored in the blood, and combined with phospholipids to form high-density lipoproteins, which can clear away the cholesterol on the walls of blood vessels and play the role of unblocking blood vessels. But the other is low-density cholesterol, easy to precipitate on the walls of blood vessels, causing arterial blood vessel blockage. Generally appear in patients with coronary heart disease. Fourth, food cholesterol into the body will not become blood sterols, it has to be digested and absorbed. The normal human body synthesizes endogenous cholesterol by the liver, and this part accounts for about 70% of cholesterol. The other part is exogenous, which accounts for about 30%. In terms of synthesis people have their own regulation, some intake more synthesis less, and some intake less synthesis more. If the food intake is not enough for a long time, the body will step up the synthesis to meet the body’s needs. Some people due to endocrine and lipid metabolism disorders, resulting in self-regulation disorders, in addition to long-term overstress, hypertension, obesity, genetics, low activity, will also make their own regulatory function dysfunction. Fifth, when there is a lack of bile acid in the body, the absorption of cholesterol will be significantly reduced, the fat in food can promote bile secretion, and the breakdown products of fat are also beneficial to cholesterol. Sixth, the cholesterol content in food is different: egg yolk is higher than egg white, fish roe is higher than fish meat, like shrimp roe, shrimp brain, oyster eggs a high content. Beef and lamb leg sticks, crab pincers and other content is low. Diet should be a combination of meat and vegetables, cholesterol-containing foods should be eaten together with vegetables, fruits, beans, grains and cereals that contain high fiber, vitamins and trace elements, which is conducive to the excretion of cholesterol and can also reduce the synthesis of cholesterol. Seventh, lipid lowering is appropriate to take control of diet, increase exercise, such as ineffective before considering the use of drugs. Because many lipid-lowering drugs affect the excretion of cholesterol and bile acids through the bile and human body, it will make the cholesterol in the bile saturated or supersaturated, easy to form stones. At the same time there is some damage to the liver. Eighth, food tofu, oats, sunflower seeds, eggplant, nuts, especially raw almonds, margarine viscous fiber containing phytosterols, all have a cholesterol-lowering effect.