This preprint presents a systems physiology framework for interpreting persistent hyperchloremia as a terrain signal rather than a primary renal abnormality. Within the Lantern of Sulfur (LoS) model, chloride-dominant acid–base patterns are understood as the laboratory-visible expression of an electrolyte terrain generated by renal execution under upstream regulatory conditions. The model introduces a vertically organized, dynamically coupled regulatory architecture linking circadian timing, hydration state, liver–bile signaling, vascular nitric oxide tone, and renin–angiotensin–aldosterone system (RAAS) interpretation. In this framework, the kidney functions as an execution layer translating upstream signals into chloride–bicarbonate transport behavior, rather than serving as the origin of disturbance. Hydration is described as a distributed system lever acting across osmotic, hepatic–bile, vascular, and RAAS layers, while taurine is positioned as a cross-axis stabilizing molecule intersecting multiple regulatory strata. Together, these elements provide a unified structure for understanding how electrolyte terrain emerges and persists. The framework generates testable hypotheses linking hydration dynamics, bile signaling, vascular regulation, and renal transport behavior to chloride-dominant states, including hyperchloremic non–anion-gap metabolic acidosis (NAGMA), despite preserved renal filtration. This work is hypothesis-generating and intended to provide a systems-level interpretive model for further experimental and clinical investigation. Related work in this research seriesAdditional preprints examine mechanistic components and clinical expression of the proposed regulatory architecture, including the hydration–bile regulatory axis, buffering failure in chloride-dominant acid–base states, cross-axis stabilizing molecules such as taurine, and clinical analyses of hyperchloremia and cardio-renal physiology in heart failure.Taurine, Chloride Signaling, and Circadian Hydration: A Systems Hypothesis Linking Osmolyte Regulation, Bile Acid Signaling, and Renal Electrolyte InterpretationThis work challenges the renal origin of hyperchloremia, proposing that electrolyte imbalance emerges from upstream interactions between hydration timing, bile signaling, and taurine-regulated osmotic control.https:// zenodo.org/records/18991786 Reversible HFrEF: The Pattern Five Specialties MissedLantern of Sulfur, Concept A′ v12.4Clinical analysis of reversible heart failure patterns linked to chloride-dominant electrolyte terrain and regulatory misinterpretation.https://zenodo.org/records/18929935 Chloride–Bicarbonate Terrain Shifts in Electrolyte Regulation (KICO Model)Lantern of Sulfur, Concept A v12.1Systems hypothesis linking metabolic rhythm, RAAS activation, and chloride-dominant acid–base terrain.https://zenodo.org/records/18930064 Circadian and Metabolic Timing in Electrolyte RegulationLantern of Sulfur, Concept A v12.1A coupled clock model examining how circadian rhythm and metabolic timing influence chloride terrain signals and cardiovascular stress.https://zenodo.org/records/18930159
Beth Ann Martell (Wed,) studied this question.