Why would you feel/notice the effects of single (or a few) amino acids taken in pill form, versus when you drink a protein shake?
I’ve seen this discussed and noticed it myself. For example will get drowsy on 1g taurine taken in a pill (even with food) but would hardly feel it in a whey shake (similar for glycine).
I don’t really understand the concept of free aminos and peptides, could someone shed some light on these concepts?