Haven't dug around for any real conclusive evidence regarding Green tomato extract, but I can vouch that it works. I tried Nocturnabol because I had great success with another product that contained Green Tomato extract (Endothil CR). After about 2 weeks, I noticed that my arms had begun to be really sore and tight. Couldn't figure out what the deal was, until I broke the tape measure out for the monthly measurement. About did a double take when I saw nearly a quarter of an inch extra on my pipes. Some people bag on it,(Green Tomato extract) but for me it worked. I love Nocturnabol, and even stack it with some other goodies, but you really can't go wrong with it. If you want a killer stack, add some: GABA,ZMA, and something that contains macuna pruriens, then get ready to go sleepy sleep.