For the past couple of weeks I have been taking glycine-propionyl-L-carnitine HCl at night off and on to see if it would help in muscle recovery and especially recovery of a chronic trigger point in my shoulder musculature. As a side effect, I noticed that it makes me sleep through the night and wake up feeling relaxed, instead of waking up wide awake at three and staring at the ceiling for the rest of the night (as I have for the past year). I have experimented enough to be sure that it is from the GPLC, and I am not taking any other supplements or prescription drugs lately (apart from glucosamine and fish oil). It has a very dramatic beneficial effect on sleep, even though I only take 758mg GPLC, which contains only 174 mg Glycine and 500mg PLC.
As far as I can tell from some research on these forums, it may be the glycine component that is helping me sleep. It appears that some other participants in these forums have been using glycine exactly for this purpose.
My question to those who have used glycine (or for that matter GPLC) for sleep or whatever else. Does a tolerance develop? Does one need to cycle it?
Edited by andre, 22 April 2009 - 02:17 PM.