Analysis of 9,992 Canadian adults over three years reveals specific food-derived metabolites dramatically influence frailty progression through inflammatory mechanisms. Plasmalogens and furan fatty acids from protein sources, plus anti-inflammatory compounds from fruits, vegetables, nuts and legumes, directly reduced frailty risk while simultaneously lowering inflammatory markers including TNF-alpha, IL-6, and C-reactive protein. Conversely, elevated omega-6 to omega-3 ratios from fish and eggs, plus trans-4-hydroxyproline from processed meats, accelerated frailty through pro-inflammatory cascades. This metabolomic approach represents a paradigm shift from studying individual nutrients to examining how the body actually processes entire dietary patterns. The findings challenge conventional wisdom about fish being universally beneficial—the omega ratio matters more than absolute intake. For aging adults, this suggests precision nutrition strategies targeting metabolite profiles rather than generic dietary advice. The large cohort size and longitudinal design strengthen causality claims, though the relatively short three-year follow-up limits assessment of long-term frailty prevention. These metabolomic signatures could eventually enable personalized anti-frailty interventions based on individual metabolic responses rather than population-level recommendations.