Dietary protein distribution across meals has emerged as a critical determinant of appetite regulation, muscle protein synthesis, and cardiometabolic health. Breakfast represents a strategic opportunity to optimize per-meal protein intake. This study quantitatively evaluated the protein content of selected breakfast foods (eggs, milk, cheese, white bread, and brown bread) using the Kjeldahl method and assessed their contribution toward the recommended 25–30 g protein per meal target. Village eggs contained 13.93% protein, poultry eggs 12.97%, milk samples ranged from 3.10–3.20%, cheese 2.99%, white bread 7.12–7.13%, and brown bread 7.41–7.48%. Significant differences were observed between egg types, bread types, and milk sources (p < .001), with large effect sizes (η² = .93–.99). A strong negative correlation was found between protein density and portion size required to achieve 25 g protein (r = −.96, p = .002). Multi-food combination modeling demonstrated that 2 eggs + 1 slice brown bread + 250 mL milk provides approximately 27.7 g protein, meeting minimum per-meal recommendations. These findings highlight the importance of protein density in breakfast planning and support strategic food combinations to optimize metabolic health outcomes.
Keywords: breakfast quality, cardiometabolic health, dietary protein, kjeldahl method protein distribution, satiety regulation
