How do environmental factors influence obesity? Key insights into scientific weight loss.

Environmental Factors of Obesity

1. Dietary Factors

Dietary preferences are a significant characteristic of individuals, families, and cultures as a whole. Our food types and eating habits are determined by the cultural accumulation of many generations and are highly habitual. At the same time, the Westernization trend in my country's dietary structure is obvious, which is directly related to the significant increase in the incidence of obesity.

It is generally believed that high-fat, high-calorie diets, insufficient consumption of vegetables, barley, and whole grains are causes of obesity. A fondness for snacks and sweets, frequently eating snacks and late-night meals in addition to three meals a day, especially eating desserts while watching television, are independent risk factors for simple obesity. Frequently consuming high-salt, fried, and deep-fried foods also contributes to obesity. Below is a list of high-sugar and high-fat foods.

High-sugar foods: sucrose, candy, rice, noodles, whole grains, dried noodles, lotus root starch, biscuits, vermicelli, water chestnut starch, dried sweet potatoes, candied fruit, alcohol, steamed buns, baked flatbread, bread, noodles, rice, arrowhead, lily bulbs, dried radish, dates, hawthorn, crabapple, potatoes, taro, apples, bananas, pears, lychees, tangerines, grapes, persimmons, peaches.

High-fat foods: cooking oil, peanuts, almonds, walnuts, sesame paste, pork belly, fatty meat, ham, dried cheese.

2. Exercise Factors

Lack of physical activity reduces energy expenditure, leading to weight gain. Insufficient exercise not only reduces energy expenditure but also directly reduces glucose tolerance due to increased insulin resistance in muscle tissue, all of which contribute to obesity.

Reduced physical activity is a significant reason for the increase in obesity in modern society. People increasingly use energy-saving equipment in work and life, resulting in less physical activity required for livelihood. In the United States, people spend more time watching television than any other activity, followed by sleep and work. Women who watch more than 4 hours of television a day are twice as likely to be obese as women who watch less than 1 hour a day.

3. Smoking

Smokers have a lower BMI than non-smokers, while those who quit smoking have the highest BMI. Male smokers absorb energy significantly more than non-smokers. Therefore, those who quit smoking generally gain weight, typically 1-2 kg in the first few months after quitting, followed by 2-3 kg over the next 4-6 months. Men have a 2.4 times higher risk of obesity after quitting smoking, and women have a 2.0 times higher risk. Those preparing to quit smoking should develop a weight management plan.

4. Alcohol Consumption

Ethanol can only be completely oxidized in the body and cannot be converted into other substances. Therefore, the energy substances consumed while drinking alcohol are stored in the body, leading to fat accumulation in habitual, non-heavy drinkers.

5. Social Factors

Socioeconomic status and education level are somewhat inevitably linked to obesity. Foods rich in carbohydrates are generally inexpensive, leading to high consumption among low-income groups. This results in a higher prevalence of obesity among those with lower economic status; for example, the prevalence of obesity is higher among Black women in the United States than among white women. Furthermore, South Asian immigrants to Britain tend to be more obese than the local British population. The abundance and affordability of food in their new homes mean immigrants need to engage in less physical activity to meet their basic needs. South Asians also tend to prefer high-fat foods, and the abundance of inexpensive, high-fat foods in their new homes caters to this preference. All these factors contribute to a significant increase in obesity among South Asian immigrants.

Weight gain is also related to low levels of education. Education significantly influences many individual behaviors and lifestyles. Without nutritional and health education, even after income increases, people often continue to use traditional nutritional, lifestyle, and cultural values ​​from their previous impoverished period to guide their energy intake and expenditure.