SAMA HOOLE: The rumen is natural seed oil mitigation . . .

The reason grain-fed is largely irrelevant for beef but a problem for chicken/pork:

Grain-finished beef: protected by biohydrogenation (2-4% PUFA)

Grain-fed pork: no protection (20% PUFA)

Grain-fed chicken: no protection (25% PUFA)

The rumen is natural seed oil mitigation.…

— Sama Hoole (@SamaHoole) October 15, 2025

A Cow's 4 Stomachs Can Digest Grasses and Extract All Its Nutrients. Man Has 1 Stomach.

from the University of Minnesota:

Ruminant stomachs have 4 compartments: the rumen, the reticulum, the omasum and the abomasum.

Rumen microbes ferment feed and produce volatile fatty acids, which is the cow’s main energy source. Rumen microbes also produce B vitamins, vitamin K and amino acids.

In calves, the esophageal grooves allows milk to bypass the rumen and directly enter the abomasum. Rumen development occurs following a change in diet and microbial growth.