Muppu transformation hearth
digestive and metabolic transformation
Siddha accounts connect medicine, digestion, breath and bodily transformation in different technical registers. The navel hearth is an editorial target-organ projection for catalyst action, not a clinical claim about metabolism.
Point 3 of 4 in Siddha Muppu
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Tirumantiram (Thirumandiram), attributed to Tirumular (primary_canonical)
Documents Siddha yoga, bodily transformation and the relation of breath, bindu and bodily mastery in the relevant tantra sections; consult the specific Tamil edition for verse numbering.
K. N. Kuppuswamy, Siddha Medicine (scholarly_modern)
K. V. U. S. Sastri, History of Siddha Medicine (scholarly_modern)