4. Economic and social inequalities - Healthy food is expensive, while processed foods are cheap - Areas with little to no fresh foods force people to rely on processed foods - Lower income populations have higher rates due to limited options. 5. Genetics and medical conditions - Some people genetically store more fat than others - Hormonal imbalances like PCOS and thyroid disorders make weight loss harder - Some medications like antidepressants and steroids can cause weight gain.