https://pmc.ncbi.nlm.nih.gov/articles/PMC9232232
UC-II Undenatured Type II Collagen for Knee Joint Flexibility: A Multicenter, Randomized, Double-Blind, Placebo-Controlled Clinical Study
https://pmc.ncbi.nlm.nih.gov/articles/PMC7222752
Undenatured Type II Collagen (UC-II) in Joint Health and Disease: A Review on the Current Knowledge of Companion Animals
