best doctors in bangalore Poor Dietary Habits: Consuming a diet high in processed foods, sugary drinks, and unhealthy fats, while lacking essential nutrients, can lead to weight gain. 2. Lack of Physical Activity: A sedentary lifestyle, characterized by insufficient exercise and prolonged periods of sitting, contributes to energy imbalance, where more calories are consumed than burned. 3. Genetic Predisposition: Some individuals may inherit genes that increase their tendency to gain weight, making it more challenging to maintain a healthy weight. 4. Environmental Factors: Societal and environmental factors, such as access to healthy food options 5. Certain Medications: Some medications, like antidepressants and certain steroids, can cause weight gain as a side effect.