Yea so i just bought a pound of l-arginine powder from NOW and it tastes horrible so i m ix it in juice and take pycnogenol with it since it increases the conversion of arginine to NO. However when i mixed it in grape juice, since it was the only juice i could get my hands on at the time, it turned green but i still took it and pretended it was an incredible hulk. To my surprise i saw online that arginine in fermented grape juice contained ethyl carbamate which is a carcinogen... i was wondering if it was the case in ONLY fermented juices or if it was just grape juice. needless to say i'm never going to do that again but i was just curious. thanx