You can spend a fortune on serums, but if your diet's running on caffeine and convenience, your skin will eventually call your bluff. This comprehensive, science-backed guide explores the profound connection between nutrition and skin health, revealing how omega-3 fatty acids reduce acne by 96% in deficient patients, why vitamin C is essential for collagen synthesis, and how the gut-skin axis influences everything from inflammation to radiance. Backed by peer-reviewed research and clinical trials, discover the foods that transform your complexion from the inside out—because you can't out-serum a bad diet, but you can absolutely glow your way to great skin.