Non-protein amino acids are found primarily in seeds, nuts, grains, and legumes.

“these non-protein amino acids are found primarily in seeds seeds being seeds nuts grains and legumes the seeds of plants are the things that if you plant in the ground they will go into a new plant these are very very highly defended because these are the final repository of the dna of these plants and they are the place where the plants are putting all their energy to move the dna to the next generation if those are not full of defense chemicals they will get eaten in abundance they will get eaten overly aggressively by herbivores and the plants will not pass on their dna the next”