Phytanic acid, a branched-chain fatty acid critical for human health, is found only in animal foods.

“phytanic acid one of the fatty acids characteristic of ruminal products from ruminants that is beef which we make our supplements out of fire starter etc is phytanic acid it's a saturated branched fatty acid synthesized from chlorophyll and oxidized to form fibranic acid it has been shown to be much higher in meat eaters than vegans and it has unique functions in the human body it is a ligand for many important enzymatic systems or even transcription factors like p par alpha and the retinoid x receptor”