Joint Supplements May Offer Modest Relief, but Evidence Is Low Quality

Some dietary supplements marketed for osteoarthritis may reduce pain and stiffness in knee osteoarthritis, but the overall quality of evidence is low and rankings vary widely by study, according to recent analyses.

A 2025 network meta-analysis in the journal Nutrients found that Boswellia, curcumin, collagen, ginger, and krill oil showed benefits for certain symptoms, but the authors cautioned that confidence in these results is limited. Another 2025 analysis ranked an extract from Boswellia resin highest for pain and eggshell membrane highest for stiffness, yet the evidence base for each ingredient remains small and heterogeneous.

Experts say no supplement has been reliably shown to change the course of osteoarthritis. "There is a paucity of high-level research," Dr. Arnold Silverberg, an orthopedic surgeon, said in an interview, adding that randomized double-blind studies should be given the most credence.

The American College of Rheumatology's 2019 guideline strongly recommends against glucosamine and chondroitin for knee and hip osteoarthritis, while the American Academy of Orthopaedic Surgeons' 2021 guideline says glucosamine and chondroitin may help mild-to-moderate knee osteoarthritis. The conflicting recommendations reflect the inconsistent trial data.

Supplements are not substitutes for exercise and weight management, the cornerstones of osteoarthritis care. The Arthritis Foundation advises that before buying supplements, consumers should see which ones have the best evidence behind them -- and which do not [1]. For most people with osteoarthritis, supplements at best offer modest, temporary symptom relief, not structural repair.

Why Supplement Rankings Differ and How Research Is Conducted

Network meta-analyses pool many trials and compare multiple treatments indirectly, which can produce rankings of supplements from best to worst. However, results depend heavily on which trials and products are included, leading to different conclusions across analyses.

Consumers should be skeptical of rankings that present a single "best" supplement. A guide from Supplement Science likewise states that joint supplement effects are usually modest and gradual, not curative [2]. The takeaway is that rankings are not definitive and should be read with caution.

Evidence for Popular Joint Supplements

Glucosamine and chondroitin are among the most heavily studied supplements for osteoarthritis, yet their evidence is mixed. The Glucosamine/chondroitin Arthritis Intervention Trial found that for most patients with joint pain, the supplements did not provide better pain relief than a placebo and had no impact on delaying disease progression [3].

Turmeric and curcumin have gained attention for their anti-inflammatory properties. A 2025 network meta-analysis found reduced WOMAC pain versus placebo for curcumin, but the certainty of evidence is low. Formulation matters: plain curcumin is poorly absorbed, while formulations designed to enhance bioavailability may produce different results.

"A plain turmeric capsule and a study-grade curcumin formulation can produce very different results," said Lauren Manaker, a registered dietitian, in an interview. A 2026 Natural News article noted that turmeric extracts show promise for joint pain, but research is ongoing [4].

Boswellia and methylsulfonylmethane (MSM) have also been studied. Boswellia has performed relatively well for pain and stiffness in several trials, though the evidence is not uniformly high quality. In contrast, MSM has thinner evidence.

Collagen showed significant improvement in function and pain in a 2025 meta-analysis, but type, dose, and duration must match the research formulations. Omega-3 fatty acids, including krill oil, show modest improvements; krill oil has knee-specific data showing improvements in pain, stiffness, and function. A 2018 systematic review in PubMed found that only green-lipped mussel extract and undenatured Type II collagen had clinically important effects on pain at medium term, and no supplements were shown to alter structural progression [5].

Reading Labels and Safety Considerations

Labels do not fully reflect the formulation, dose, or extract used in research. Consumers should compare products to research formulations and look for third-party testing such as USP or NSF. Manaker suggests setting a baseline and a trial period of 8 to 12 weeks, then stopping if no benefit. "If you don't see improvement after 8 to 12 weeks, it's reasonable to stop," she said in an interview.

Safety is a concern. Turmeric and curcumin supplements have been linked to rare liver injury, particularly products designed to boost absorption. Supplements may cause digestive upset or interact with medications; consult a physician or pharmacist. The Arthritis Foundation advises that people with osteoarthritis should talk to their healthcare provider before starting any supplement [1].

Consumers should also be aware that the supplement market is not tightly regulated. The article advises that your provider can help you determine whether a supplement is appropriate. For most people, the decision to try a supplement should be made in consultation with a healthcare professional.

Exercise and Weight Management Remain Core Treatments

Exercise reduces pain and stiffness and improves strength, mobility, and function in people with osteoarthritis. Strength training should target quadriceps and hip muscles to support and offload the knee. Physical therapy has been shown to be as effective as surgery for some patients with osteoarthritis [6].

Weight loss reduces knee-joint load. A 2005 study found that each pound lost equals about four pounds less load per step. "Adopting a healthy lifestyle is the best intervention for avoiding or improving joint replacement surgery," Silverberg said in an interview. He added that instead of asking which supplement is best, patients should ask what symptom they want to improve, how strong the evidence is for the exact formulation, and what to realistically expect.

The American College of Rheumatology's 2019 guideline conditionally recommends exercise and weight loss as core treatments for knee and hip osteoarthritis. For most people with osteoarthritis, a combination of exercise, weight management, and, if needed, pain relief medication is the mainstay of treatment.

Supplements may play a complementary role for some, but the evidence does not support them as replacements for proven therapies. "No supplement has been reliably shown to change the course of osteoarthritis," Silverberg said. The bottom line is that supplements are not a cure, and consumers should approach them with realistic expectations and professional guidance.

References

1. 12 Supplements for Osteoarthritis. https://www.arthritis.org/health-wellness/treatment/complementary-therapies/supplements-and-vitamins/12-supplements-for-osteoarthritis
2. Best Supplements for Joint Pain and Osteoarthritis. https://supplementscience.ai/blog/best-supplements-for-joint-pain
3. Exercise May Help Knees More Than Glucosamine - Mercola.com, October 25, 2013.
4. Turmeric Extracts Show Promise for Joint Pain, Research Indicates. https://www.naturalnews.com/2026-10-15-turmeric-extracts-show-promise-for-joint-pain.html
5. Dietary supplements for treating osteoarthritis: a systematic .... https://pubmed.ncbi.nlm.nih.gov/29018060/
6. Physical Therapy as Good as Surgery for Osteo - Mercola.com, April 05, 2013.

Explainer Infographic