First time ordering l-ornthine. I ordered because I hear its an interesting amino acid I just found out about. It supposedly helps with everything from N02 production to helping with alcohol hangovers. (benefits) I've tried it several times sense I got it and it does seem to help before/after a hike and the last couple times I had some drinks I took it and it seems to actually help with not feeling bad after a night out. Quality and ingredients are legit.