T Nation

Leucine vs Leucine Di/Tripeptides?

I don’t really understand how one is superior to the other. Wouldn’t the ingestion of free form Leucine be indirectly turned into a Di/tripeptides if needed? Also I was under the impression that ideally your body would want to break down polypeptides as close as possible to oligopeptides or better yet free form AA’s?

IIRC, di and tri peptides pass through the stomach and are absorbed by special transporters specially designed for di and tri peptides resulting in faster elevation of AA levels… I think.

Right the Peptide Transporter 1 (PepT1) is where oligopeptides get “absorbed” sort to speak. I guess what I am asking is in an over simplification how do free form AA’s get absorbed such as L-Leucine?