1, a common dietary misunderstanding
1, eating potatoes is easy to get fat.
Many people regard potatoes as fattening foods, but they are not. Potatoes contain starch, but its water content is as high as 70%, the real starch content is only 20%, and it also contains dietary fiber that can produce satiety, so it is not easy to get fat, and it also has the effect of losing weight! Potatoes are regarded as fattening food because of improper traditional cooking methods, and good potatoes are made into French fries and chips. A medium-sized baked potato without oil has only a few thousand calories, while the calories of French fries can be as high as 200 kilocalories or more. What makes people fat is not the potato itself, but the fat it absorbs. Anyone who has cooked beef with potatoes knows that potatoes have a strong oil absorption.
2. Vegetables are healthier to eat raw.
Many vegetables are really healthier when eaten raw, because they can best retain the nutrients in them. But raw food is not suitable for all vegetables, such as potatoes, beans, eggplant, etc., which contain toxic substances and must be cooked before eating; Carrots are rich in vitamin A, but only when people eat carrots and consume fat can they get enough vitamin A from them.
It is absolutely safe to drink mineral water.
Many people say that mineral water is rich in minerals and is more beneficial to human body.
However, mineral water may also be polluted by harmful substances (such as mercury and cadmium) in the land. Recently, Dutch scientists analyzed 68 different brands of bottled mineral water produced in 16 countries, and found that mineral water is more susceptible to the pollution of dangerous microorganisms and bacteria, which contains more pathogenic microorganisms than expected. Although these bacteria may not pose a great threat to healthy people, bacteria in bottled mineral water may pose a considerable danger to people with weak immunity.
Drinking coffee is harmful to human health.
Coffee can easily lead to the loss of calcium in the body, but as long as milk is added to coffee, this deficiency can be made up. In fact, coffee is good for people. It can excite brain cells and refresh the brain. If you feel sleepy after getting up in the morning, have a cup of coffee and your mind will clear up immediately. As long as drinking coffee is not excessive and hidden, adding milk before drinking will not endanger human health.
5. Honey is low in calories and helps to lose weight?
If you want honey to lose weight, then your hopes will often fail. In fact,100g honey contains 303 calories, while100g soup contains 399 calories. The former has only slightly lower calories than the latter. But judging from the contents of potassium, zinc and copper, the nutritional value of honey is higher than that of sugar.
Bread and butter is healthier than French fries.
Once upon a time, people knew that French fries in fast food were high in calories, so they chose bread slices that looked healthier. But in order to make slices of bread taste better, many people spread butter on them when eating. In fact, compared with French fries, buttered bread slices have little difference in oil content, but almost the same contents of starch, protein and minerals. And relatively speaking, French fries contain more vitamin C, so bread and butter is not healthier than French fries.
7. Salad is extremely beneficial to human health.
Probably because of the low calorie, salads are favored by many people. Salad contains as much as 80% water, but in fact, the nutrients that the human body takes from salad are also very low. Not only that, most women should not eat too much salad. Because women's physique is usually cold, eating too much salad can easily lead to poor metabolism, poor blood circulation, bad menstruation, dull skin and even wrinkles. In addition, the nitrate content of many vegetables is also high, mainly from the fertilizer for growing vegetables, and its potential harm should not be underestimated.
8. Eating assorted cereals for breakfast can resist hunger better than slices of bread.
Assorted cereal contains diced fruit, walnuts, raisins and other foods, and milk is added, which seems to be more abundant, but in fact it contains about the same calories as bread slices with jam. But people who eat assorted cereals usually have low blood sugar content, and the higher the sugar content, the less likely it is to make people feel hungry. Therefore, in fact, eating bread and jam is more resistant to hunger.
9. Fruits that are not sprayed with pesticides need not be washed.
Even green fruits should be carefully washed with water before eating. Eggs on the peel of fruits (such as strawberries and apples) are invisible. If fruit is eaten without washing, it is easy to be infected by bacteria.
10, dark eggs have higher nutritional value than light eggs.
Dark color is often synonymous with high health and nutritional value, but the color of eggshell is only related to the variety of hen. The nutritional value of eggs depends entirely on the health status of hens and the quality of daily feed.
1 1. Eating at night will ruin your good figure.
If this view is correct, then 99% people on the earth will become fat. In fact, only when you eat too much at night will you get fat. If you don't eat too many calories at night, you won't be overweight. However, if you want to stay, eat too late, or have the habit of taking supper, it will really increase the burden on your stomach and easily lead to sleep disorders.
12, brown sugar is more beneficial than white sugar.
Brown sugar and white sugar are both extracted from sugar cane or sugar beet. The production process of brown sugar is slightly simpler than that of white sugar, which contains more glucose and cellulose, and releases energy faster and has higher absorption and utilization rate. However, brown sugar contains almost the same sugar and calories as white sugar. Moreover, the taste of brown sugar is not as sweet as white sugar, so people will naturally put more when drinking tea and coffee, so in fact, brown sugar is sometimes more dangerous than white sugar.
13. Butter contains more calories than margarine.
Butter and margarine have the same calorie content. In fact, some margarine products are not lower in calories than ordinary butter, and their unsaturated fatty acid content is higher, which is more likely to lead to an increase in cholesterol levels in the body!
14, glucose can keep people in excellent condition.
Although the "lightning energy" provided by glucose can make people clear-headed and energetic in a short time, this energy will be consumed quickly and people will even feel hungrier than before.
15. Enzymes in tropical fruits help to lose weight.
If so, that would be great. We only need to eat pineapple and papaya to lose weight. But in fact, the enzymes contained in tropical fruits can support protein's digestion, so that food can be better absorbed by the human body, but the body fat will not be burned. So slimming can't be achieved by enzymes.
16, brown bread is whole wheat bread.
People who pay attention to healthy eating are often confused by the color of food: brown bread is considered to be a food with higher health and nutritional value. As everyone knows, it is only the food coloring added by the baker when baking bread that makes black bread more attractive to buy. Therefore, black bread is not equal to whole wheat bread. It is best to read the logo clearly when buying whole wheat bread.
Sweeteners help to lose weight.
Many people know that drinking soup is easy to get fat, so using sweeteners instead of sugar can help us lose weight. But research shows that all sweeteners (especially Tang Jing) will accelerate insulin secretion, which will make you more dependent on sugar.
Fresh vegetables are healthier than frozen vegetables.
If it refers to fresh vegetables just picked from vegetable fields, there is no problem with this statement. But in fact, most of the vegetables we eat are not so fresh, usually stored for a few days, and vitamins are gradually lost during storage. On the contrary, vegetables frozen at ultra-low temperature can retain more vitamins, because quick freezing after picking can prevent the loss of vitamins.
2. Precautions after eating
1. Avoid drinking tea immediately.
Some people are used to putting down their rice bowls and drinking tea after meals, which is really a bad habit that does more harm than good. Because drinking tea can increase the secretion of gastric juice and promote the digestion and absorption of food, especially meat, but tea contains a lot of tannins, which will turn protein in food into indigestible solidified substances after entering the gastrointestinal tract, which will hinder the body's absorption of nutrients such as protein and iron, and will lead to malnutrition over time. People who have the habit of drinking tea after meals may wish to rinse their mouths with tea after meals, which can not only remove oil and relieve boredom, but also clean their teeth and prevent dental caries due to fluoride in tea.
2. avoid eating cold drinks immediately
Eating cold drinks immediately after meals will produce strong cold stimulation to the digestive tract, causing strong peristalsis of the digestive tract, which may cause abdominal pain and diarrhea. At the same time, the drastic changes of cold and heat will cause the blood vessels in the stomach to contract suddenly, which will lead to the disorder of the digestive function of the stomach in the long run, and even cause indigestion or other diseases.
3. Avoid smoking immediately
People who have a hobby of smoking often say, "A cigarette after a meal is better than a living immortal." In fact, smoking after meals is harmful. According to the determination of relevant personnel, smoking 1 cigarette after meals absorbs more poisons than smoking 10 cigarette at ordinary times. Because after eating, gastrointestinal peristalsis is strengthened, blood circulation is accelerated, and the capillaries of the whole body are in a relaxed state. At this time, the human body's ability to absorb smoke is "the best", and toxic substances in smoke are easier to enter the human body than usual, which can aggravate the harm to the human body.
Step 4 avoid strenuous exercise
There is a folk proverb, "Take a hundred steps after a meal and you can live ninety-nine", which means that proper exercise after a meal can help digestion and is beneficial to human health. However, if you engage in strenuous activities immediately after meals, such as playing ball games, running, engaging in heavy physical labor, etc. , will affect the digestion and absorption of food, harmful to the body. Because the muscles of limbs need more blood supply during strenuous exercise or labor, the blood supply of gastrointestinal tract will be relatively reduced. Digestion and absorption are bound to be affected. In addition, there is more food in the stomach after meals, and the weight is also great. If you exercise or overwork, it is easy to cause abdominal pain, gastroptosis and other diseases. So exercise or labor should be arranged after meals 1 hour.
5. Avoid taking a bath and swimming immediately.
After a meal, people's digestive system begins to digest and absorb violently, and the blood needed is greatly increased. If you take a bath or swim immediately at this time, the skin blood vessels dilate, the blood flow increases, the blood supply to the digestive tract decreases, and the digestive ability weakens. The whole body exercise during bathing and swimming also promotes the increase of blood flow of various motor organs, which will further weaken the digestive activities of the gastrointestinal tract. In addition, when swimming, the human body is immersed in water, on the one hand, the pressure of water affects the peristalsis of the stomach and hinders the full mixing of food and gastric juice; On the other hand, abdominal blood vessels stimulated by cold water will cause contraction, resulting in insufficient blood supply to the stomach, which is prone to stomach cramps, vomiting or indigestion. Therefore, take a rest after dinner and before taking a bath 15 minutes, and then go swimming half an hour later. If it is a fierce game, it should be held 2 hours after dinner.
Step 6 avoid defecation immediately
Many people have the habit of defecating immediately after meals, which is very harmful to human health. Because the secretion of gastric acid and digestive enzymes increases after eating, the peristalsis function of the stomach is enhanced. If the stool is relieved when the stomach is full of undigested food, the intra-abdominal pressure will suddenly rise, and gastric acid and digestive enzymes may reflux to the esophagus, which may form reflux esophageal ulcer after a long time. After eating hard food, people have difficulty defecating and have great abdominal pressure. Hard food is easy to damage gastric mucosa and can form erosive chronic gastritis for a long time. Stool immediately after meals can also promote pyloric smooth muscle dysfunction and bile reflux, leading to gastric mucosal congestion, edema and inflammation. Therefore, people who have the habit of defecation immediately after meals should gradually correct it.
7. Avoid going to bed right away
After meals, due to the increase of blood flow in digestive organs, the blood supply to the brain is relatively reduced, and people will feel tired and even sleepy. This phenomenon is more obvious after lunch. If you sleep immediately after meals, gastrointestinal peristalsis slows down, digestive juice secretion decreases, and food cannot be fully digested. Especially children will cause digestive dysfunction, indigestion and malabsorption, and will cause malnutrition for a long time. And food stagnation in the stomach will also promote the excitability of the brain, making it difficult for people to fall asleep. Even if you fall asleep, there will be the phenomenon of "gnashing your teeth, talking in your sleep, having nightmares, etc." Therefore, they have to wait for a while after dinner before going to bed.