ja, in nature lysine typically exists in proteins that are hydrolized or otherwise metabolized, I like to calculate the amount I would get from a food source , the amount of that food source I could ever possibly eat from when I am starving, to completely filling me up, about a kg. Then, ingest no more of whatever substance under consideration than such an amount. Admittedly, I sometimes break my own rule though, and mentioned Lys just for folk with kidney issues, known or unknown, cuz if such a person would go apeshit on Lys, they could seriously harm themselves. Sometimes I wonder why I give a shirt