Title The Metabolic Nexus of Indigenous Health Disparities: Exploring the Intersecting Roles of Enterotoxigenic Bacteroides fragilis (ETBF), Thiamine, and Niacin Description / Abstract This position paper outlines a novel, unified biochemical paradigm to explain the persistent disparities in acute and chronic disease burdens between First Nations populations and non-Indigenous demographics in Canada. Rather than analyzing metabolic syndromes, vascular illnesses, and severe infectious outcomes through isolated clinical lenses, this paper introduces a compounding, lethal molecular cycle driven by Enterotoxigenic Bacteroides fragilis (ETBF)—the leading anaerobic cause of septicemia and bacteremia in human medicine. The research details how ETBF acts as a metabolic hijacker within the host gastrointestinal tract. By utilizing its signature toxin (BFT) to cleave E-cadherin and destroy epithelial tight junctions, the pathobiont downregulates host thiamine (Vitamin B1) and niacin (Vitamin B3) transport machinery, inducing localized malabsorption. This targeted depletion paralyzes the mitochondrial gateway enzyme, Pyruvate Dehydrogenase (PDH), forcing healthy tissue into an inefficient, anaerobic "Warburg effect." The resulting lactic acidosis creates an acidic, hypoxic microenvironment that suppresses host T-cell and macrophage responses, allowing the highly drug-resistant pathobiont to multiply unchecked and escape into the bloodstream. Furthermore, this paper highlights a critical pharmacological paradox: standard chronic care interventions, specifically the widespread use of metformin for Type 2 diabetes, act as competitive inhibitors of the human Thiamine Transporter-2 (hTHTR-2) receptor. This drug-nutrient interaction, combined with accelerated diabetic renal washout and the biological "weathering" effects of intergenerational trauma, leaves vulnerable hosts in a state of profound, hidden mitochondrial thiamine depletion. When an infection occurs, standard empirical antibiotic monotherapy frequently fails because it does not address the underlying cellular energy crisis. Ultimately, this paper argues for a clinical shift toward metabolic resuscitation. By analyzing the genetic feedback networks of ETBF—specifically its reliance on cis-acting TPP riboswitches—the paper details how the strategic co-administration of high-dose intravenous thiamine alongside broad-spectrum antibiotics can neutralize the pathogen's competitive edge, re-activate human mitochondrial respiration, and clear lethal lactic acidosis. This framework offers an actionable, molecular pathway toward dismantling deep-seated health inequities and restoring metabolic harmony in First Nations communities. Keywords First Nations Health; Indigenous Health Disparities; Enterotoxigenic Bacteroides fragilis (ETBF); Thiamine Deficiency (Vitamin B1); Niacin (Vitamin B3); Sepsis / Septicemia; Metformin Drug-Nutrient Interaction; Warburg Effect; TPP Riboswitch; Metabolic Resuscitation; Intergenerational Trauma; Allostatic Load.