Processed foods can negatively affect overall health by contributing to obesity, diabetes, and heart disease. These foods typically contain high levels of added sugars, unhealthy fats, and preservatives, which can lead to nutrient deficiencies. Additionally, they often lack essential fiber and can promote overeating due to poor satiety. Reducing processed food intake supports better health outcomes and encourages the consumption of whole, nutrient-dense foods that nourish the body.