Overview
Type II collagen taken at low dose for immune-mediated joint tolerance.
- Endogenously produced or biosynthesized molecule
- Standardized pharmaceutical- or food-grade supplement
- Combined with cofactors that improve absorption or activity
- Capsule or softgel
- Powder
- Sublingual or buccal
- Liposomal liquid
Forms & variants of UC-II (Undenatured Collagen)
Different chemical forms of UC-II (Undenatured Collagen) behave differently. Browse each form's mechanism, bioavailability, and best-use context.
Mechanism of action
Oral tolerance via gut-associated lymphoid tissue down-regulates collagen-targeted autoimmunity.
- · Oral tolerance via gut-associated lymphoid tissue down-regulates collagen-targeted autoimmunity
Effects on the body
Organ system effects
Evidence-based benefits
Superior to glucosamine+chondroitin in head-to-head OA trial
Moderate evidencePotential side effects
- · UC-II (Undenatured Collagen) is generally well-tolerated at evidence-based doses
- · Mild GI discomfort (nausea, loose stools, or bloating) possible at higher intakes
- · Headache or transient fatigue reported by a small fraction of users
- · Allergic or hypersensitivity reaction (rash, itching, swelling)
- · Sleep disturbance if taken late in the day
- · Discontinue and seek medical advice if symptoms are severe, persistent, or include difficulty breathing
Drug interactions
Supplement interactions
- A high-quality multivitaminCovers micronutrient cofactors that support most supplement pathways.
- Omega-3 (EPA/DHA)Foundational anti-inflammatory support that complements most regimens.
No specific avoidances listed.
Dosing & bioavailability
Where to buy
Affiliate links — we may earn a commission at no extra cost to you. Amazon code supplementsch-20 is auto-applied at checkout. We don't endorse specific brands; verify third-party testing (USP, NSF, Informed Sport) before purchase.
Third-party testedIndependently verified UC-II (Undenatured Collagen) — look for USP, NSF, or Informed Sport seals on the label for purity and dose accuracy.UC-II (Undenatured Collagen) third party tested NSF
CapsulesPre-measured UC-II (Undenatured Collagen) capsules — easiest for travel and consistent daily dosing without scoops or scales.UC-II (Undenatured Collagen) capsules
PowderBulk unflavored UC-II (Undenatured Collagen) powder — best cost-per-gram and flexible dosing for stacking or mixing into drinks.UC-II (Undenatured Collagen) powder unflavored
Best sellersMost-purchased UC-II (Undenatured Collagen) products on Amazon — a quick way to see what's reviewed widely before you commit.UC-II (Undenatured Collagen) best sellerScientific evidence8Show studiesHide studies
Undenatured type II collagen for knee osteoarthritis
Lugo JP, et al.
180-day RCT of UC-II 40 mg/d vs glucosamine+chondroitin.
Greater improvement in WOMAC score with UC-II.
PubMed: UC-II (Undenatured Collagen) — Superior to glucosamine+chondroitin in head-to-head OA trial
Live PubMed search
Live results for "UC-II (Undenatured Collagen) Superior to glucosamine+chondroitin in head-to-head OA trial" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching UC-II (Undenatured Collagen) and "Superior to glucosamine+chondroitin in head-to-head OA trial". Filter by RCT, meta-analysis, or year on the results page.
PubMed: UC-II (Undenatured Collagen) — randomized controlled trial
Live PubMed search
Live results for "UC-II (Undenatured Collagen) randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching UC-II (Undenatured Collagen) and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.
PubMed: UC-II (Undenatured Collagen) — meta-analysis
Live PubMed search
Live results for "UC-II (Undenatured Collagen) meta-analysis" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching UC-II (Undenatured Collagen) and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.
PubMed: UC-II (Undenatured Collagen) — pharmacokinetics
Live PubMed search
Live results for "UC-II (Undenatured Collagen) pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching UC-II (Undenatured Collagen) and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.
PubMed: UC-II (Undenatured Collagen) — safety adverse events
Live PubMed search
Live results for "UC-II (Undenatured Collagen) safety adverse events" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching UC-II (Undenatured Collagen) and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.
PubMed: UC-II (Undenatured Collagen) — dose response
Live PubMed search
Live results for "UC-II (Undenatured Collagen) dose response" across the PubMed/MEDLINE peer-reviewed index.
Opens current human and preclinical literature matching UC-II (Undenatured Collagen) and "dose response". Filter by RCT, meta-analysis, or year on the results page.
Google Scholar: UC-II (Undenatured Collagen) — clinical evidence
Live Scholar search
Cross-database citation index for UC-II (Undenatured Collagen) as it relates to "clinical evidence".
Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.