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Head-to-head evidence comparison — which supplement is right for you?
ASU and UC-II are closely matched across evidence, studies, and safety.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Shared outcomes (1)
Outcomes where both ASU and UC-II have evidence — compare verdict strength side-by-side.
300mg ASU daily (standardized avocado:soybean unsaponifiables)
with-meals
Standardized ASU (300mg)
40mg UC-II daily (providing ~10mg undenatured type II collagen)
any
Undenatured type II collagen (UC-II, 40mg)
1-3 months
1-3 months
Throughout use
8-24 weeks
8-16 weeks
Throughout use
Efficacy and safety of avocado-soybean unsaponifiables for the treatment of hip and knee osteoarthritis: A systematic review and meta-analysis of randomized placebo-controlled trials.
Int J Rheum Dis (2019) · Meta analysis
A subanalysis according to the type of OA showed that ASU significantly decreased both VAS and Lequesne index in knee OA (WMD: -17.36, 95% CI: -25.91, -8.82; P < .0001 and WMD: -2.33, 95% CI: -2.88, -1.78; P < .00001, respectively) but not in hip OA.
Symptomatic efficacy of avocado-soybean unsaponifiables (ASU) in osteoarthritis (OA) patients: a meta-analysis of randomized controlled trials.
Osteoarthritis Cartilage (2008) · Meta analysis
Four trials were included, with 664 OA patients with either hip (41.4%) or knee (58.6%) OA allocated to either 300 mg ASU (336) or placebo (328).
Dietary supplements for treating osteoarthritis: a systematic review and meta-analysis.
Br J Sports Med (2018) · Meta analysis
Of 20 supplements investigated in 69 eligible studies, avocado soybean unsaponifiables revealed statistically significant improvements on pain, but were of unclear clinical importance.
Efficacy and tolerability of an undenatured type II collagen supplement in modulating knee osteoarthritis symptoms: a multicenter randomized, double-blind, placebo-controlled study.
Nutr J (2016) · Rct · n=191
UC-II 40mg/day improved total WOMAC vs placebo over 180 days
Safety and efficacy of undenatured type II collagen in the treatment of osteoarthritis of the knee: a clinical trial.
Int J Med Sci (2009) · Rct · n=52
UC-II reduced WOMAC 33% vs 14% for glucosamine+chondroitin
Undenatured type II collagen (UC-II(R)) for joint support: a randomized, double-blind, placebo-controlled study in healthy volunteers.
J Int Soc Sports Nutr (2013) · Rct · n=55
Improved average knee extension range vs placebo
Both ASU and UC-II are closely matched — the best choice depends on your specific health goals.
For joint health & mobility, UC-II has a higher relevance score (65 vs 60).
No known interactions between ASU and UC-II have been documented in our database. However, always consult a healthcare provider before combining supplements.