okay i've taken ~5 grams of glycine right before i sleep for 3 nights in a row now. another 5 grams during the day. i can't say i feel much more refreshed when i wake up. however, i can tell you for sure i am dreaming a lot more and they are more vivid. certainly that could mean deeper sleep than usual. just about an hour ago i had a clear vivid dream that i was having an out of body experience. like, i was able to instantly lay down and fall asleep right away. but i would sit up and be "out of body" right away. kind of hard to explain but it took lot of effort to "get up". have you guys ever have the experience of trying to keep awake when you're super tired and falling asleep (or is already sleeping) and your eye lids feels like they weights a ton. well that's the feeling when i was trying to get up except it's not just the eyes lids that felt heavy, but the entire body felt heavy until you "break from it". it felt very real... but as i try to turn around and look at my physical body i wasn't able to see my self clearly at all. then i realized i was dreaming. pretty neat experience. i woke up not long after so i was able to recall it clearly.
as for glycine's other effects i'll have to observe more.
it looks and taste like sugar even down to water solubility. first time i mix it with 2-3 oz of water but it wouldn't completely dissolve so now i just put i on my tongue and wash it down with water.