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RECRUITING

NCT07318896

Effect of Agar/Collagen-based Compounds on Osteoarticular Pain: Randomized Triple-blind Clinical Trial

Sponsor: Fundació Eurecat

View on ClinicalTrials.gov

Summary

Joints-comprising bone, cartilage, ligaments, and synovial fluid-enable stable daily movement but may deteriorate with age, excess body weight, overuse, injury, or disease. Such degeneration, common from age 40 onward, underlies joint disorders like osteoarthritis, particularly in the knees, hips, hands, and spine, and is a major cause of chronic pain and disability. While antiinflammatory analgesics remain the standard approach to symptom control, they neither cure disease nor regenerate cartilage and can produce significant long-term adverse effects (gastrointestinal, hepatic, renal, and cardiovascular). These limitations motivate interest in natural or complementary strategies with safer profiles. Within this context, marine algae, especially agar derived from red seaweed, have attracted attention for potential intestinal, metabolic, and joint benefits, aided by their fiber content. Another promising option is undenatured type II collagen (UC-II), the principal structural component of articular cartilage, whose endogenous production declines with age; clinical studies indicate that a daily intake of 40 mg UC-II can improve mobility, reduce pain, and enhance quality of life in individuals with osteoarthritis or exercise-related joint discomfort. Based on these considerations, an agar-agar supplement has been developed to relieve knee joint symptoms.

Official title: Evaluation of the Effect of Agar and/or Collagen Based Compounds on Osteoarticular Pain. A Randomized, Parallel, Placebo Controlled, Triple Blind Clinical Trial (AGARTROSIS)

Key Details

Gender

All

Age Range

40 Years - 70 Years

Study Type

INTERVENTIONAL

Enrollment

Start Date

2025-11-10

Completion Date

2027-02

Last Updated

2026-01-06

Healthy Volunteers

Conditions

Osteearthritis Joint Damage Inflammation Cartilage Damage

Interventions

DIETARY_SUPPLEMENT

Agar-Agar

2.4 g of agar-agar (Rhodophyceae group) presented in capsule form will be given.

DIETARY_SUPPLEMENT

Agar-Agar and undenatured collagen type II

2.4 g of agar- agar + 40 mg of undenatured collagen type II, presented in capsule form will be given.

DIETARY_SUPPLEMENT

undenatured collagen type II

40 mg of undenatured collagen type II + 2.4 g of maltodextrin will be given in capsule form

DIETARY_SUPPLEMENT

Placebo

2.4 g Maltodextrin will be given in capsule form

Inclusion Criteria: * Men and women between 40 and 70 years of age. * Submit a score of 6 to 10 out of 20 on the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) knee pain questionnaire. * Sign the informed consent form. * Know how to read, write, and speak Spanish and/or Catalan. Exclusion Criteria: * Present body mass index (BMI) values \<18.5 kg/m\^2 or ≥30 kg/m\^2. * Present intolerances or allergies related to Agar-Agar, or any of the components of the products being evaluated, such as collagen or maltodextrin. * Take or have taken medications that may affect the study results. This is especially true for those who have been treated with oral or intra-articular corticosteroids within the 4 and 12 weeks prior to screening, respectively, or medications for osteoarthritis at the time of screening. * Patients who depend on prescription medications for pain control. * Take multivitamin or mineral supplements, collagen derivatives, or supplements containing bioactive compounds that may exert an anti-inflammatory effect, such as turmeric, ginger, omega-3, or polyphenol supplements. (Individuals who consume multivitamin, mineral, or collagen-derived supplements or supplements will be eligible to participate in the study, provided they are willing to discontinue their intake for at least two weeks prior to the start of the study and throughout the entire study period). * Be an active smoker or have been one for less than 6 months. * Alcohol consumption: * Men: Consume 4 or more Standard Drink Units (SDU) daily or SDUs weekly. * Women: Consume 2 or more Standard Drink Units (SDU)\* daily or SDUs weekly. * Have a diagnosis of osteoarthritis, active rheumatoid arthritis, and any inflammatory arthritic condition such as secondary inflammatory arthritis, gout, pseudogout, knee infection, marked angular deformities, or significant injury to the target joint within the 6 months prior to the start of the trial; arthroplasty and joint surgery of the target knee within the 2 years prior to the start of the study. * Have any gastrointestinal disease that affects the absorption of the compound and/or the study results, such as celiac disease, Crohn's disease, active cancer of any organ of the digestive or renal system, or hepatitis. * Be ineligible to participate in the study, according to the pre-screening evaluator's criteria. * Have lost 3 kg or more in the last 3 months. * Be pregnant or intend to become pregnant. * Be breastfeeding. * Be unable to follow the study guidelines. * Be participating or have participated in a clinical trial involving drug intervention or nutritional intervention within the last 30 days prior to inclusion in the study.

Locations (1)

Eurecat, Technological Center of Catalonia, Nutrition and Health Unit

Reus, Tarragona, Spain

Clinical Research Directory

Effect of Agar/Collagen-based Compounds on Osteoarticular Pain: Randomized Triple-blind Clinical Trial

Summary

Key Details

Conditions

Interventions

Eligibility Criteria

Locations (1)