Eating vegetables will make you fatter, and refusing to eat meat will lead to insufficient intake of protein in animals. Even if plant proteins such as beans are supplemented, their absorption and utilization rate is far less than that of animal proteins. When protein, a vegan, doesn't eat enough, protein, carbohydrate and fat in human body will be out of balance, and immunity, memory decline, anemia and indigestion will follow. In addition, due to the little intake and absorption of fat-soluble vitamins, vitamins and nicotinic acid are also lacking. When diarrhea comes, it is easy to feel dull and dermatitis. Moreover, fruits, vegetables, soybeans and grains are rich in dietary fiber, which can promote gastrointestinal digestion on the one hand and intestinal peristalsis on the other hand, reduce the time for intestinal contents to pass through the intestine and shorten the interval of defecation. Excessive dietary fiber will accelerate the discharge of mineral nutrients in the gastrointestinal tract, resulting in a shortage of mineral nutrients that have been lost without being absorbed. Most importantly, many women eat vegetables just because they think they can lose weight by eating vegetables. In fact, when they eat vegetables, they can't lose weight. That's because vegetables are easy to absorb oil, but they are easier to eat more oil and gain weight. One gram of oil has about 9 calories; In a gram of protein, there are about 4 calories; In contrast, one gram of rice has only four calories. Therefore, eating only vegetables without eating will lead to more oil and protein in the diet and a sharp increase in calories, which will lead to obesity. If you don't eat meat for a long time, your immunity will decline. In our diet, various trace elements beneficial to human body are essential. No matter which element is missing, it means potential danger to the body! Nutrition is the material basis of human health and longevity. The quality and quantity of nutrition directly affect human health, disease resistance and life span. The human body's demand for dietary nutrition is not only comprehensive, but also balanced. Meat food contains 8 kinds of essential amino acids, which are more suitable for human digestion and absorption. And the content of lysine is higher, which is more beneficial to supplement the deficiency of lysine in plant protein. Not eating animal protein for a long time will lead to decreased immunity. However, a long-term vegan diet will definitely make people lack vitamin B 12, calcium, iron, zinc and other trace elements, which will have many adverse effects on the human body. Cautious vegetarianism leads to decreased fertility. Among many studies on the influence of vegetarian diet on women's fertility, the conclusion of Masbaolan College in Munich, Germany is the most striking. Professor Karl Burke of the college divided the healthy girls who participated in the experiment into two groups, one of which was vegetarian except a little cheese and milk. The other group ate ordinary food. After the 6-week weight-loss program, the researchers found that 78% of the women who lost weight on a vegetarian diet stopped ovulation, and almost all of them had shorter menstrual cycles than normal people. In the normal diet group, 67% of women ovulate normally, and the menstrual cycle has not changed significantly. Professor Karbaoke analyzed that the reason why women in vegetarian group stopped ovulating was related to the low content of protein in the food they ate, which led to abnormal hormone secretion and menstrual cycle disorder when the two groups of subjects lost the same weight and exercised the same amount. In this way, she came to the conclusion that vegetarianism will lead to abnormal reproductive function and even seriously affect reproductive ability. Professor Carlbark pointed out that if women don't want their fertility to be affected, they must think twice before going vegetarian, especially for women over 30, whose fertility has declined, so they should be more cautious. Vegetarians have paid attention to nutrition collocation for years. Scientific research shows that although vegetarian habits have indisputable benefits in resisting cardiovascular diseases and preventing obesity and other diseases, because people live in a rapidly developing modern social environment, vegetarians are often "ashamed" in front of jobs that require a lot of physical strength. Therefore, vegetarians need to pay more attention to nutritional collocation. 1. Pay attention to protein's supplement. Whether children or adult vegetarians, five or six kinds of foods containing high protein should be arranged in their daily meals, such as beans, nuts, seeds, tofu or other bean products, eggs or dairy products. Although there are many kinds of these foods, they can be eaten in moderation and with food. Don't forget, calcium supplementation is a key element to keep the human body working normally. Vegetarians not only can't get calcium supplement from meat, but also can't get the necessary calcium supplement because they basically don't drink dairy products. Therefore, scientists suggest that vegetarians should not exclude dairy products such as milk when possible, and should eat dairy products in moderation. In addition, drinking soybean milk, eating soybeans, broccoli, calcium-fortified juice, cereals, etc. can all play an important role in supplementing calcium. Vegetarians should pay attention to that although green vegetables such as Chinese cabbage and mustard are considered to have high calcium content, not all calcium in dark green vegetables can be absorbed by the human body. For example, spinach and beet contain high oxalate, which will hinder the body from absorbing calcium. Scientists also pointed out that although vegetables can also be a channel for calcium supplementation, their effect is far less than that of dairy products. 3. Appropriate vitamin supplementation Scientists have found that although vegetarians' eating habits belong to "healthy diet", they are also "partial eclipse", so the supply of vitamin B 12 on them often becomes a big gap. Vegetarians who generally do not eat dairy products, eggs, fortified soy milk and other foods should take vitamin B 12 every day. In addition, vegetarians should also take vitamin D to strengthen the absorption of calcium. Vegetarians still need fat. Scientists point out that vegetarians are more tired of greasy food. Nevertheless, moderate intake of beneficial fat is not only beneficial to health, but also plays a role in preventing cancer. However, for vegetarians, because they don't eat fish, eggs and seafood, they often can't get this kind of fat. On the contrary, vegetarians can eat more foods such as linseed oil, soybean oil and walnuts.