2003 Oesser - Stimulation of type II collagen byosynthesis with degraded collagen
2009 Nakatani - Chondroprotective effect of prolyl-hydroxproline peptide
2010 Ohara - Effects of Pro-Hyp on hayaluronic acid synthesis
2012 Carballeda - RCT type I Collagen downregulates inflammation in knee ostoarthritis patients
2013 Naraoka - Knee injections of collagen tripeptide in rabbit
2014 Kumar - RTC collagen peptide osteoarthritis
2020 Volpi - effectiveness of a novel hydrolyzed collagen formulation