Before I could get home, my husband got a hold of Methionine and tried it himself. Let me back up and say that this man has an iron stomach so when the cysteine bothered him it was very unusual. Because of his iron stomach he decided to jump in all the way and took the max dosage of methionine split in three over one day. Not only did he handle it just fine, but in only hours, he experienced the positive uplift that it had taken weeks to reach on the previous cysteine version with its accompanying supplements. He can't wait to go with the whole package and see what that brings. Can't thank you enough for the methionine information!