Sometimes yes, sometimes no. I usually don't eat anything 1 hour prior to bedtime, but sometimes I go to sleep with as little as 30 minutes since the last food ingestion, which is usually 40g whey protein with a banana and fruit juice.
I kinda think it does raise my GH levels, as my face seems younger since I've started taking it about 40 days ago. Then again, I'm 36 so it might not make a noticeable difference for the young people here.
As far as sleep quality goes, I must say it is MUCH improved. Once I gave some to this girl friend of mine who is 24 and the next morning when she woke up she said something like "WHOA, I don't remember sleeping that deeply, EVER! What the HECK did you give me?"... and "I still feel like I'm about to fall back into sleep at any moment, too..." I replied to this "As soon as you move around a little, that impression just VANISHES". She agreed.
So I can say I'm definitely not alone in seeing this. Moreover, a 4-month supply of L-Ornithine is only $11 at 1Fast400.com. Some other stores such as legalgear.com and BAC may even have it cheaper. I'd really, really like to hear about results of this combined with melatonin... And maybe taurine? Anyone?