Physical purification (kāyaviśuddhi) enhances agni — the metabolic and digestive fire central to Ayurvedic medicine. Strong agni means efficient digestion, robust immunity, and vitality.

Gulma (abdominal tumors) and ajīrṇa (indigestion) represent common pathologies that dhauti helps prevent or cure. The promise of āyuṣprada (granting longevity) connects physical health with the extension of useful life for spiritual practice.

The logic is circular: healthy body → better digestion → more energy → better practice → healthier body.