Puṣṭa Kṛṣṇa: So you asked me the question, "Is there vitamins in the grass?" And obviously there's not such vitamins in grass that it produces milk. So the vitamins are coming from Kṛṣṇa? Yes?
Prabhupāda: Yes. Because if you eat grass, considering that there is vitamins—"There is indeed"—then you'll die.
Tamāla Kṛṣṇa: Of course, Karttikeya Mahadeviya...
Prabhupāda: Eh?
Tamāla Kṛṣṇa: Mr. Mahadeviya, he might talk upon this point-wheat grass.
Pañca-draviḍa: But cows aren't all eating wheat grass.
Prabhupāda: Cows are eating grass, dry grass, and giving you nice milk. Now, if you eat it—"There is vitamins. Let me eat"—you'll die. So who made this arrangement?
Guru-kṛpā: They may argue, though, that even women give milk after there's baby, and they eat all sorts of things.
Prabhupāda: They eat grass?
Guru-kṛpā: They eat meat. They eat fish. They are making milk also.
Prabhupāda: Milk is there, but it is not that it is due to eating such and such.
Pañca-draviḍa: Yeah, that doesn't prove anything.
Prabhupāda: Yes. Milk is there.