Hen market taxonomy by types reveals structural diversification. The _formula type_ segment includes modular formulas (single-nutrient supplements), polymeric formulas (whole-protein-based solutions), and disease-specific formulations (e.g., for phenylketonuria or renal failure). Modular formulas dominate in specialized settings, while polymeric formulas account for ~50% of volume due to broad applicability. _Administration method_ segments—bolus feeding, gravity feeding, and pump feeding—reflect clinical preferences. Pump feeding, with precise dosing, dominates ~40% of the market in chronic cases, while bolus feeding is common in acute settings. These subsegments influence supply chain dynamics, regulatory compliance, and R&D priorities, ensuring the HEN market adapts to both clinical and patient-centric needs.