There is no beneficial or harmful food;all flavors become tasteless;even the most terrible poison ingested is digested as nectar.

This verse describes the siddhis (powers) attributed to the domain of Mahāmudrā.Na pathyam apathyam — neither beneficial nor harmful — indicates that the practitioner transcends ordinary dietary restrictions.Your digestive system and metabolism are purified to the point of processing any substance.

Sarve rasāḥ nīrasāḥ — all flavors become tasteless.This can be understood in two ways: the yogī loses attachment to gustatory pleasures, or his palate transcends ordinary preferences, achieving equanimity in the face of sweet and bitter.

Viṣaṃ ghoraṃ pīyūṣam iva — the terrible poison like nectar.This statement should not be taken literally as an invitation to consume toxic substances, but as a metaphor for the transformative power of yoga: what destroys the ordinary nourishes the realized.