Obesity has grown in Bangladesh, especially among women and in metropolitan areas. According to BDHS data, women and cities had higher rates, with a considerable increase between 1999 and 2014. Urbanization, dietary changes, inactivity, and socioeconomic factors all contribute to the obesity pandemic, which has shifted the focus from infectious to noncommunicable illnesses. This study investigates the reasons for obesity, including gender, lifestyle, health consequences, and policy problems, with inadequate rural representation in studies.

Rapid urbanization in Bangladesh has resulted in a significant increase in obesity incidence, particularly in places such as Dhaka and Chittagong. The urban environment encourages sedentary behavior and increases availability to high-calorie, low-nutrient meals. According to the Bangladesh Demographic and Health Survey (BDHS), obesity rates among urban people have increased dramatically, with BMI values rising from 17% in 2011 to more than 25% by 2025 (34). The move to motorized transportation, office-based occupations, and high-rise dwelling has resulted in decreased physical exercise, exacerbating this trend (35). Urban areas have experienced a major decrease in manual labour, with the younger population particularly vulnerable to weight gain as traditional vocations give place to desk employment (36).

Obesity in Bangladesh is distinguished by considerable gender differences. According to studies, women are more likely than males to be obese, particularly in metropolitan settings. The disparity in obesity rates between metropolitan women (about 30%) and urban males 20% features the importance of cultural and societal norms. In many Bangladeshi communities, societal norms limit women’s engagement in physical activities, and the homebound aspect of their everyday life frequently contributes to weight gain. Postpartum weight retention and cultural stigma against overweight women compound the problem (37). On the other hand, urban males, who frequently work in labor-intensive jobs, had lower obesity rates. However, when individuals move into more sedentary employment conditions, their obesity risk rises (38).

Socioeconomic status is a major factor in predicting obesity prevalence in Bangladesh. Higher-income groups, particularly those living in cities, tend to overeat processed foods and engage in less physical exercise because of lifestyle choices. Obesity in these groups is frequently associated with prosperity, with prevalence rates of up to 35% in wealthier urban communities (39). Lower-income populations, many of whom live in urban slums, confront both undernutrition and overnutrition. This phenomenon, known as the “nutrition transition,” happens when individuals who were previously food insecure suddenly experience over nutrition as a result of increasing availability to low-cost, energy-dense foods. This change has resulted in increased obesity rates among lower-income groups, with estimates indicating a prevalence of 15-20% in slums (40).

The shift in food patterns contributes significantly to Bangladesh’s obesity epidemic. Traditional diets consisting of rice, lentils, fish, and vegetables are gradually being supplanted by convenience meals such as fast food and sugary drinks. According to research, vegetable intake in urban homes has decreased by 20-30% during 2010, which correlates with an increase in BMI across various age groups (41). Fast food consumption has increased, particularly among urban young, as global franchises such as KFC and Pizza Hut expand into cities. According to surveys, urban teenagers increasingly consume fast food 2-3 times per week, accounting for an estimated 300-500 more calories each meal (40). Physical inactivity is another important element in the obesity pandemic. Sedentary lifestyles are widespread in metropolitan Bangladesh, particularly among office workers and those who engage in modest physical exercise. According to research, urban individuals spend 6-8 hours each day engaged in sedentary activities such as screen time and driving. This sedentary behavior is also seen in youngsters when school curricula prioritise academics over physical education, resulting in insufficient physical exercise (41). Furthermore, the scarcity of recreational places in urban areas, notably in Dhaka, where green spaces make up less than 1% of urban territory, exacerbates the problem (42).

The growth in obesity in Bangladesh has increased in noncommunicable diseases, such as type 2 diabetes, hypertension, and cardiovascular disease. According to the NCD Risk Factor Survey, 40% of obese adults have at least one NCD, and the incidence of diabetes among obese people has quadrupled from 7% in 2010 to 14% in 2025. The healthcare system, which has typically concentrated on infectious diseases, is failing to meet the rising burden of noncommunicable diseases. Obesity-related NCDs currently account for a sizable fraction of hospital admissions in metropolitan areas such as Dhaka (43).

The Bangladeshi government has made attempts to combat obesity, albeit these programs are still in their infancy. The National Nutrition Policy (2015) and NCD Action Plan (updated around 2020) have aims for lowering obesity, such as taxing sugary beverages and increasing nutritional labelling. However, these rules confront implementation issues due to inadequate enforcement and opposition from the food sector [44]. School-based initiatives to promote nutrition education and physical exercise have shown potential, although they are restricted in breadth and reach. These projects, spearheaded by non-governmental organizations such as BRAC, have been successful in cities, but rural communities remain underserved (45).

There is a substantial lack in comprehensive, national statistics on obesity in Bangladesh. The BDHS, while significant, is updated infrequently and lacks reliable longitudinal investigations. Literature is dominated by studies on urban regions, leaving rural obesity relatively unexplored, despite data showing that rates are growing in rural areas due to changing eating patterns and decreasing physical labor. Furthermore, rural communities are under-represented in obesity research, with just 10-15% of obesity-related studies including rural individuals. This urban bias impedes the formulation of strategies that address the entire spectrum of obesity in Bangladesh, particularly in rural regions where the difficulties differ dramatically from urban settings (46).

Behavioral and Cultural Factors Understanding cultural norms and behaviors is critical for combating obesity in Bangladesh. In many civilisations, including Bangladesh, greater body proportions may be seen as a symbol of riches or success, leading to harmful eating habits (47). Cultural behaviors such as big family gatherings with excessive food intake, paired with conventional body image attitudes, may contribute to increased obesity rates. These cultural dynamics should be studied to develop treatments that respect local norms while supporting healthier lives. Furthermore, stress, melancholy, and emotional eating have important psychological roles in the development of obesity (48).

Environmental influences Environmental factors have a substantial impact on the developing obesity pandemic in metropolitan Bangladesh. The built environment, which includes urbanisation and a lack of public recreational places, frequently restricts chances for physical activity. According to studies, urban people, particularly in places like Dhaka and Chittagong, confront obstacles like high pollution levels, limited green areas, and low walkability, all of which discourage active lives (49). Furthermore, the growth of fast food outlets and food deserts has a substantial impact on nutritional choices. The marketing of unhealthy meals, particularly to children and low-income people, exacerbates the situation by encouraging excessive intake of calorie-dense foods (50).

Targeted Interventions Gender-specific programs Obesity disproportionately affects women in Bangladesh, particularly in cities. Gender-specific hurdles, such as restricted mobility due to safety concerns and social stigma associated with women’s engagement in outdoor physical activities, aggravate the problem (41). Interventions that promote gender-sensitive health policies and programs, such as female-only fitness centres or community exercise clubs, may encourage women to engage in more physical activity (51). Community-based obesity prevention initiatives have been beneficial in a variety of locations, including Bangladesh. Community-driven solutions that are customized to local needs are more likely to work and be sustainable (43). The study should investigate how local leaders and health workers can involve communities in encouraging healthy lifestyles.

Childhood obesity Preventing childhood obesity is critical to addressing Bangladesh’s obesity problem. School-based initiatives that combine nutritional instruction with physical exercise should be extended. Furthermore, engaging parents in these programs guarantees that children receive reinforcement at home (30). Government initiatives that limit the availability of junk food in schools and promote healthier lunch alternatives might help to reduce childhood obesity rates. Long-term studies of children’s health and development into adulthood will shed light on how early intervention might minimize obesity-related disorders such as diabetes and hypertension (40).

Integration with NCD Prevention. Given the close association between obesity and noncommunicable illnesses including diabetes, hypertension, and cardiovascular disease, obesity prevention must be included into larger NCD preventive initiatives. A multi-sectoral strategy that includes healthcare, urban planning, education, and agriculture is required to create surroundings that promote healthy eating and physical exercise (36).

Policy and Advocacy Governmental measures have an important role in combating obesity. Regulating the availability and promotion of unhealthy foods, particularly sugary drinks and high-calorie meals, is one strategy to reduce intake. Taxes on sugar-sweetened drinks and restrictions on junk food ads directed at children have been shown to be effective (23).

Research Capacity Building research capability in Bangladesh is critical for understanding the causes of obesity and developing effective therapies. Local research projects should be financed and encouraged to examine the particular causes of obesity in distinct places, taking into account food habits, cultural traditions, and socioeconomic variables (40). Furthermore, developing surveillance systems to collect reliable data on obesity trends and intervention efficacy is critical for informing policy choices and tracking progress in obesity prevention.

Addressing the dual burden of malnutrition in Bangladesh, particularly in rural regions, undernutrition and overnutrition coexist, resulting in a dual malnutrition burden. Research should concentrate on integrated techniques for addressing both concerns concurrently. This might include supporting balanced meals that give appropriate nourishment while avoiding excessive calorie consumption (32). Nationwide surveys are crucial for determining the prevalence of obesity at the population level. These surveys can give information about the factors that lead to obesity, such as socioeconomic status, geographic location, and access to health care (39). Understanding these epidemiological variables is critical for establishing tailored therapies for high-risk groups. Studies can also identify the genetic, environmental, and behavioral components that influence obesity, allowing interventions to be customized to particular requirements in a variety of settings (43). Community-based treatments are promising because they include local communities and develop culturally relevant initiatives. Research has demonstrated that initiatives such as walking groups and community sports can successfully reduce obesity and promote healthy behaviors (35). Such efforts target the physical, mental, and social aspects that lead to obesity, empowering communities to maintain healthy gains.

Schools are a great site for early interventions, notably in childhood obesity prevention. Schools can help build lifetime healthy behaviors by emphasizing nutrition education, physical exercise, and healthier food policy (41). Research has shown that school-based programs are beneficial, particularly those that engage both kids and their families (27). Policies that address the structural drivers of obesity, such as food marketing rules and urban planning, are critical to lowering the social burden of obesity. Studies on initiatives like sugary drink tariffs and zoning rules for healthy eating settings have demonstrated that they help to reduce obesity rates (41). Qualitative research reveals how cultural perspectives of body image and diet impact obesity. In other societies, bigger body sizes are regarded as a sign of prosperity or health, thus normalising fat (51). Social networks and family dynamics have a substantial impact on eating habits and physical activity. Lower-income persons, for example, may experience financial difficulties in acquiring healthy food or recreational places, exacerbating the risk of obesity (48).

Emotional eating, stress, and sedentary lifestyles are all significant behavioral impacts on obesity. Qualitative research can disclose people’s psychological and emotional concerns, allowing for more tailored therapies to address these issues. Research into psychological variables that contribute to obesity can give a more comprehensive knowledge of the disorder, going beyond physical and environmental causes (52). Obesity has a substantial economic impact because of the high expenses involved with treating obesity-related disorders such diabetes, cardiovascular disease, and cancer [25]. Quantifying the economic effect of obesity can assist governments in allocating resources to preventive and treatment programs. It also emphasizes the need of early measures in reducing these expenses. Economic studies of obesity prevention initiatives can help identify which therapies provide the highest return on investment. For example, school-based programs or community fitness efforts may be extremely cost-effective, especially when considering long-term healthcare expense savings (42). Long-term economic studies assessing the ROI of obesity prevention indicate significant savings that may be realized by avoiding obesity and its accompanying disorders. According to studies, preventing obesity-related illnesses such as type 2 diabetes can save large amounts of money on healthcare (53).