ahaṁ vaiśhvānaro bhūtvā prāṇināṁ deham āśhritaḥ
prāṇāpāna-samāyuktaḥ pachāmy annaṁ chatur-vidham || 14||

My Understanding : All the food we consume is digested with the help of Agni (fire). Krishna says, “I am the Vaishvanara within you,” which means, “I am the fire that resides in you.”