I also use ...... as a bulk supplier of many items. As far as published studies, Dat would be the one to ask. I can offer you the anectdotal encouragement of my most recent research theory: 12 weeks CJC/GHRP-6, 12 weeks CJC/Hex, have begun 12 weeks CJC/ GHRP-2. The addition of the alpha GPC came in the second 12wk protocol. My pre-inj stack consists of:1. 3gms GABA 2. 3gms L-dopa 4. 3gms Arginine composite(AAKG,arg-hcl,arg ethylest,and agmatine) 5. 1 gm quercetin. 6.1000mg Alpha GPC. All taken on an empty stomach, AND when blood glucose is no higher than 99.(Yes, I use a meter).I have not only maintained lean mass, but gained, and more importantly,have developed the classic "Striations", that only come with pre-contest diet routines. I am not on a pre-contest regimen, but rather a high carb albeit low glycemic carb lean bulk fest! My dosages of CJC would be considered low by most,...but the stack has provided me with at least a synergy if not amplification.