There are various complex factors and it is impossible to accurately pinpoint the cause of obesity. Although genetic disposition is one of them, the key cause of obesity is unhealthy dietary habits such as eating foods high in calories.

Age is another factor. As people get older, they need less calories but tend to not change their dietary habits. This is especially true of middle-aged people who enjoy relatively higher income, more social activities but less physical activity. They become obese due to decreased metabolism rates and the daily accumulation of excess calories.

Your BMI = Your weight (kg) ÷ your height (meters) ÷ your height (meters) 

Overfeeding babies in their first year increases their chances of becoming overweight. Another reason for weight gain when very little is eaten could be that what is eaten is high in calories. For example, the vegetables in a salad may have only 10-12 calories. However, many salad dressings, such as Thousand Island and mayonnaise, are made from oil and egg yolks, both of which are high in calories and cholesterol. For example, a tablespoon of Thousand Island dressing has 59 calories and 4 milligrams of cholesterol. A cup of milkshake alone could have around 2,000 calories—that’s the daily calorie requirement for a man! 

Count your calories and control your calorie intake. Avoid meat, oil or deep-fried items for breakfast. Breakfast is the most important meal of the day. However, it is also the meal that will cause you to put on weight most easily, as the digestive system is very ready to absorb food after a fast during the night. 

Eat a plant-based breakfast instead. Also, eat slowly. Each meal should take at least half an hour. It takes 20 minutes for the “full” signal from the stomach to reach the brain. 

Low-calorie foods include boiled or steamed food, and plant foods. Some people may not be used to the lighter taste of these foods at the beginning, preferring more tasty, stir-fried or even deep-fried food. Hence, they may turn to exercise as a weight loss solution. While exercise can help to burn calories, it is not as effective as reducing calorie intake. Continuously jogging for one hour may burn about 413 calories, equivalent to the amount of calories from drinking three cans of cola. However, this can be highly strenuous for a person who is not used to the intensity of the exercise yet. 

Reducing calorie intake does more than help weight loss. Low-calorie foods tend to have more nutrients that benefit health. Also, good nutrition and regular exercise are both necessary for strengthening the immune system. Determination is needed to succeed in weight management, so keep at it! 

Many herbal slimming teas contain tea leaves or tea leaf extracts and laxatives. Tea leaves contain about 3.5% caffeine by weight.Caffeine is a stimulant and is harmful to the body.

People on a low-carbohydrate diet cut out all carbohydrates from their diet and increase their intake of protein and fat. For example, they do not eat bread, rice and pasta but eat lots of meat, cheese and butter. Weight loss occurs quickly in the short run. However, most of the weight loss comes from loss of water and muscle tissue, not fat, which is what you need to lose to keep the weight off. Muscle burns more calories than fat does. A decrease in the amount of muscle tissue 

It depends on what kind of diet you are on. Frequent improper dieting involving fasting or eating very little may result in the body getting used to low food consumption. Lacking fuel for muscles, the body prepares for starvation by storing fats and losing muscle tissue. With less muscle to burn calories, metabolism decreases.This makes it even harder to control weight as the lower metabolism requires even less calorie intake than before.