Undenatured type II collagen (UC-II(R)) for joint support: a randomized, double-blind

Background:UC-II contains a patented form of undenatured type II collagen derived from chicken sternum. Previous preclinical and clinical studies support the safety and efficacy of UC-II in modulating joint discomfort in osteoarthritis and rheumatoid arthritis. The purpose of this study was to assess the efficacy and tolerability of UC-II in moderating joint function and joint pain due to strenuous exercise in healthy subjects.Methods:This randomized, double-blind, placebo-controlled study was conducted in healthy subjects who had no prior history of arthritic disease or joint pain at rest but experienced joint discomfort with physical activity. Fifty-five subjects, who reported knee pain after participating in a standardized stepmill performance test, were randomized to the placebo (n = 28) or the UC-II (40 mg daily, n = 27) cohort for 120 days. Joint function was assessed by measuring knee flexion and knee extension as well as time to experiencing and recovering from joint pain following strenuous stepmill exertion.Results:After 120 days of supplementation, subjects in the UC-II group exhibited a statistically significant improvement in average knee extension compared to placebo (81.0 +/- 1.3o vs 74.0 +/- 2.2o; p = 0.011) and to baseline (81.0 +/- 1.3o vs 73.2 +/- 1.9o; p = 0.002). The UC-II cohort also demonstrated a statistically significant change in average knee extension at day 90 (78.8 +/- 1.9o vs 73.2 +/- 1.9o; p = 0.045) versus baseline. No significant change in knee extension was observed in the placebo group at any time. It was also noted that the UC-II group exercised longer before experiencing any initial joint discomfort at day 120 (2.8 +/- 0.5 min, p = 0.019), compared to baseline (1.4 +/- 0.2 min). By contrast, no significant changes were seen in the placebo group. No product related adverse events were observed during the study. At study conclusion, five individuals in the UC-II cohort reported no pain during or after the stepmill protocol (p = 0.031, within visit) as compared to one subject in the placebo group.Conclusions:Daily supplementation with 40 mg of UC-II was well tolerated and led to improved knee joint extension in healthy subjects. UC-II also demonstrated the potential to lengthen the period of pain free strenuous exertion and alleviate the joint pain that occasionally arises from such activities.



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