Nutritional Analysis of Fruits and Vegetables and Snack Consumption Strategies: Scientifically Correcting Misconceptions about Fruit-Based Weight Loss and Making Scientific Choices Between Chocolate and Beverages

Many people use vegetable meals or vegetable soup as their main food when trying to lose weight, believing that this is a low-calorie and healthy option. However, if vegetables and fruits are the main meals for a long time, they cannot meet the body's needs for protein, fat, and minerals, which can have adverse effects on the endocrine and digestive systems. Furthermore, it can lead to an increased appetite, making it easy to overeat and regain weight after resuming a normal diet.

Replacing vegetables with fruit is also a mistake. Fruits are high in sugar, mostly glucose, fructose, and sucrose. Excessive intake can easily cause a spike in blood sugar and insulin levels. Fructose is converted into fat in the liver, leading to weight gain. Vegetables are low in sugar and mostly starch. Vegetables are a major source of vitamins and minerals, while fruits are a major source of potassium. However, fruits generally contain less vitamins and minerals than leafy green vegetables.

Fruits are rich in soluble fiber pectin, which slows down gastric emptying. Vegetables mainly contain insoluble fiber, which effectively prevents constipation. People with different constitutions should choose different fruits. For example, bananas are cooling in nature and high in sugar, so diabetics should eat them sparingly. Apples are high in potassium, so people with coronary heart disease or diabetes should not eat too many. Not all fruits are low in calories; some are high in sugar.

Eating half a watermelon can easily result in an intake of 680 kilocalories. Pineapples, cantaloupes, papayas, and grapes are high in sugar, and those trying to lose weight should avoid consuming too much of them. Apples, lemons, plums, cherries, and citrus fruits are lower in sugar and are better choices. Many young people rely on "fruit diets," such as the "apple diet." Because apples are low in calories, using them as a food source can indeed lead to weight loss.

However, prolonged adherence to the apple diet, due to insufficient intake of protein, fat, and trace elements, can lead to dry hair, dull skin, anemia, sensitivity to cold, and even affect work. Once the apple diet is stopped, weight will quickly return. Fruit should not replace meals; even when dieting, regular meals should be the main focus, with fruit as a supplement. It is recommended to eat 100-200 grams of fruit per day.

The calorie content of watermelon depends on its sugar content; it's recommended to choose "unsweet" watermelons or eat only a small amount of high-sugar ones. Chocolate is a high-calorie food, but eating chocolate doesn't necessarily cause obesity. Dark chocolate, with a higher cocoa content, is less high in calories and is one of the lowest in sugar and fat, with a large portion of its fat being unsaturated. Try to eat dark chocolate before meals; its slow melting makes it easier to feel full.

Daily food intake should not exceed 50 grams. Chocolate is rich in antioxidants, which can help fight oxidative stress. Moderate tea consumption is beneficial to health during weight loss; tea polyphenols can help maintain blood vessel elasticity. However, strong tea should not be consumed on an empty stomach or before bed. Drinking tea on an empty stomach dilutes gastric juices and reduces digestive function. Many beverage products contain calories, which can increase calorie intake while replenishing fluids.

During weight loss, you should only drink tea and low-calorie beverages in moderation. It's best to choose water, tea, or homemade drinks. Drinking ice water after heavy sweating from exercise will strongly irritate the gastrointestinal tract, causing smooth muscle spasms. Rapidly cooling the body will affect heat dissipation and disrupt regulatory functions, even causing colds, muscle pain, and rapid heartbeat. Therefore, it's not advisable to drink ice water after heavy sweating from exercise; instead, drink warm water.

Milk, especially whole milk, contains about 3% fat, and low-fat and yogurt contain even less. Drinking 500 ml of milk per day only provides about 140 kcal, so there's no need to worry. The lactic acid bacteria in yogurt help with nutrient absorption and improve constipation. Milk contains tryptophan and other sleep-inducing substances, making it suitable for drinking in the evening. People trying to lose weight should choose skim milk in the evening; as long as the amount is not too large, it won't lead to weight gain.

Milk-containing beverages are not the same as milk. Strictly speaking, milk must contain at least 2.5 grams of protein per 100 milliliters. Milk-containing beverages contain only about one-third the protein of fresh milk, with the majority being water. Long-term substitution of milk with these beverages can negatively impact the development of adolescents.