Feline FBM · 6.2

6 Water Recovery and Stool System · 6.2 SGLT1 and Water-Sodium Absorption

6.2 SGLT1-Mediated Water-Sodium Absorption

Feline Fat-Based Metabolism (Fat-Based Metabolism)

Definition

SGLT1-Mediated Water-Sodium Absorption describes glucose-sodium cotransport that can drive water recovery in the proximal small intestine. In Feline FBM it is a key mechanism for backtracing constipation under exogenous carbohydrate load.

Exogenous carbohydrate load can influence water-sodium absorption. Do not confuse external carbohydrate intake with endogenous glucose production.

Constipation is not explained by residue shortage alone. Link to stool water content, colonic propulsion, and upstream food structure.

Control Variables
1. Exogenous carbohydrate load

Exogenous Carbohydrate Load from food structure.

2. Proximal small-intestinal water recovery

Water pulled with sodium cotransport.

3. Stool water content

Output layer for loose stool and constipation.

4. Bile-acid-related colonic regulation

Bile-Acid-Related Colonic Regulation for distal patterns.

Causal Chain

upstream food structure

exogenous carbohydrate load

SGLT1-mediated water-sodium absorption

proximal water recovery and distal water balance

stool water content and constipation index

Observable Outputs

Constipation and loose stool indices are backtrace entry points—not root causes and not proof of fiber deficiency by default.

Boundary
Invalid readings

constipation = needs more fiber residue

SGLT1 mechanism = only human relevance

exogenous load confused with endogenous glucose

Page duty

This page defines cotransport structure only. Not a clinical diagnosis system, not a treatment protocol, not an effect-guarantee system.