Best Supplements for Arthritis UK — What Actually Works (2026)

Best Supplements for Arthritis UK — What Actually Works (2026)

Posted June 2026 | Written by Chris Jones, Social Media Manager at Nutrivity with 7+ years in the supplement industry.

Arthritis affects over 10 million people in the UK. It’s the leading cause of chronic pain and disability, yet most people manage it with little more than paracetamol and the occasional trip to the GP. Prescription options exist, but many carry significant side effects that make long-term use problematic.

That’s driven a growing interest in natural supplements for arthritis. But which ones are backed by actual clinical evidence, and which are just expensive placebo? This guide separates the science from the marketing.

For a broader overview of all joint supplements beyond arthritis specifically, see our complete guide to the best supplements for joint pain UK.

Osteoarthritis vs Rheumatoid Arthritis — Why It Matters for Supplementation

Arthritis isn’t a single condition. The two most common forms respond to different supplements, and choosing the wrong one wastes your money.

Osteoarthritis (OA) is wear-and-tear arthritis. Cartilage gradually breaks down, bones rub together, and pain develops over years. It typically affects weight-bearing joints — knees, hips, and the lower back. OA responds best to cartilage-supporting supplements like glucosamine and anti-inflammatory compounds like Devil’s Claw.

Rheumatoid arthritis (RA) is an autoimmune condition where your immune system attacks your own joint tissues. It causes symmetrical inflammation — both hands, both wrists — and is often accompanied by fatigue and systemic symptoms. RA responds best to anti-inflammatory supplements, particularly omega-3 fatty acids which modulate the immune response.

Most supplement research focuses on osteoarthritis because it’s far more common (affecting roughly 8.75 million people in the UK compared to around 400,000 with RA). However, several supplements benefit both types.

The 5 Best Supplements for Arthritis in the UK

1. Devil’s Claw — Best for Arthritis Pain and Inflammation

Devil’s Claw is the strongest natural anti-inflammatory with direct evidence for arthritis pain. The active compound harpagoside inhibits COX-2 and LOX pathways — the same targets as pharmaceutical NSAIDs — without the gastrointestinal risks associated with long-term ibuprofen use.

A systematic review of 14 clinical trials concluded that Devil’s Claw extract at 2,000mg+ per day produced clinically meaningful improvements in osteoarthritis pain, particularly in the knee, hip, and lower back. In one landmark trial, it matched the prescription NSAID rofecoxib for back pain reduction over six weeks.

What sets Devil’s Claw apart from other natural anti-inflammatories is the speed of its effects. Most people notice improvements within 2–4 weeks, compared to 8–12 weeks for glucosamine. This makes it particularly useful for managing arthritis flare-ups alongside slower-acting supplements. For a detailed comparison against pharmaceutical options, see Devil’s Claw vs ibuprofen.

Best for: Osteoarthritis pain, inflammatory flare-ups, reducing NSAID dependency

Recommended: Nutrivity Devil’s Claw 2200mg — highest-strength formulation available in the UK. Vegan friendly, halal friendly, GMP standard. See our Best Devil’s Claw UK comparison.

2. Glucosamine (+ Cod Liver Oil) — Best for Cartilage Repair in Osteoarthritis

Glucosamine is the most extensively researched supplement for osteoarthritis worldwide. It provides the building blocks your body needs to maintain and repair cartilage — the shock-absorbing tissue that breaks down in OA.

The evidence is strongest for glucosamine sulphate at 1,500mg daily, which has shown statistically significant improvements in joint pain, stiffness, and function over 12–24 weeks in multiple randomised controlled trials. The GAIT trial found that glucosamine combined with chondroitin was more effective than either alone for moderate-to-severe knee osteoarthritis.

Combining glucosamine with cod liver oil adds an anti-inflammatory and lubricating dimension. The omega-3 fatty acids in cod liver oil reduce inflammatory cytokines while supporting synovial fluid production — the natural lubricant inside your joints. The naturally occurring vitamin D in cod liver oil also supports bone health, which is particularly important for arthritis sufferers. Learn more about this combination in our article on cod liver oil and joint health.

Best for: Osteoarthritis, cartilage maintenance, long-term joint health

Recommended: Nutrivity Cod Liver Oil & Glucosamine — dual-action formula combining glucosamine with omega-3-rich cod liver oil. Halal friendly, UK-made. See our Best Cod Liver Oil & Glucosamine UK comparison.

3. Omega-3 Fatty Acids — Best for Rheumatoid Arthritis

If you have rheumatoid arthritis specifically, omega-3 fatty acids are your most important supplement. A meta-analysis of 17 randomised controlled trials found that omega-3 supplementation significantly reduced joint pain intensity, morning stiffness duration, and the number of painful joints in RA patients. Several studies also showed reduced NSAID consumption in the omega-3 groups.

The mechanism is well-established: EPA and DHA from fish oil compete with pro-inflammatory omega-6 fatty acids, shifting your body’s inflammatory balance. They also promote the production of specialised pro-resolving mediators (SPMs) that actively help resolve inflammation rather than just suppressing it.

Cod liver oil is the optimal source because it combines omega-3 with naturally occurring vitamins A and D. Vitamin D is particularly relevant since RA patients have higher rates of vitamin D deficiency, which worsens both the autoimmune and inflammatory components of the disease.

Best for: Rheumatoid arthritis, systemic inflammation, morning stiffness.

4. Vitamin D3 + K2 — Essential for Arthritis and Bone Health

Arthritis and bone health are closely linked. Osteoarthritis accelerates bone density loss around affected joints, while rheumatoid arthritis medications (particularly corticosteroids) can weaken bones significantly. Vitamin D deficiency — which affects one in five UK adults — compounds both problems.

Vitamin D3 at 4,000 IU daily supports calcium absorption and bone mineralisation, while K2 MK-7 directs that calcium into bones rather than soft tissues. For arthritis sufferers, this combination helps maintain bone integrity around joints that are already under stress from cartilage loss or inflammation.

Emerging research also suggests vitamin D plays a direct role in inflammatory modulation, with adequate levels associated with lower circulating markers of inflammation including CRP and IL-6. This makes D3+K2 a foundational supplement for anyone with arthritis, regardless of type.

Recommended: Nutrivity Vitamin D3 4000 IU + K2 MK-7 — 365 tablets, full year’s supply, 3.6p per day. Vegan friendly, halal friendly.

5. Turmeric / Curcumin — Popular but Choose Carefully

Curcumin has strong anti-inflammatory evidence for osteoarthritis, with one trial showing it matched ibuprofen for knee OA pain. However, bioavailability is poor without enhanced delivery (piperine, phytosomal, or nano formulations). Standard turmeric powder is essentially useless as a supplement — you need a concentrated extract with an absorption enhancer.

Nutrivity does not currently offer a turmeric supplement. For arthritis-specific anti-inflammatory support, Devil’s Claw offers comparable evidence and is available in a high-strength UK-made formulation.

Which Supplement for Which Type of Arthritis?

Best Supplement Combinations for Arthritis

For osteoarthritis: Devil’s Claw + Cod Liver Oil & Glucosamine + Vitamin D3+K2. This covers pain relief, cartilage repair, joint lubrication, and bone strength. Total cost under 15p per day. Wondering about combining these? See our guide: can you take glucosamine and Devil’s Claw together?

For rheumatoid arthritis: Cod Liver Oil & Glucosamine (primary — for omega-3 anti-inflammatory and immune modulation) + Vitamin D3+K2 (for bone protection and inflammatory balance). Add Devil’s Claw if pain management is a priority alongside your prescribed medication.

For both types: Vitamin D3+K2 is non-negotiable. It’s the foundation supplement every arthritis patient in the UK should take, given the prevalence of deficiency and its dual role in bone health and inflammatory modulation.

What the NHS Says About Supplements for Arthritis

The NHS position on arthritis supplements is cautious. They acknowledge that some people find glucosamine helpful but note the evidence is mixed. They recommend a balanced diet rich in omega-3 and don’t specifically endorse any supplement.

This caution is understandable — the NHS has to make population-level recommendations and can’t endorse products. But it doesn’t mean the evidence isn’t there. The clinical trials supporting Devil’s Claw and glucosamine are published in peer-reviewed journals and meet the same methodological standards as pharmaceutical trials. The gap is in NHS adoption, not in evidence quality.

What the NHS does clearly recommend: maintaining a healthy weight (every kg of excess weight puts 4kg of extra pressure on your knees), staying active with appropriate exercise, and seeking specialist referral if your symptoms significantly affect daily life.

The Bottom Line

Arthritis isn’t something you just have to live with. While supplements won’t cure it, the right combination can meaningfully reduce pain, slow cartilage degradation, and improve mobility — with a safety profile that makes long-term use practical.

Start with the supplement that matches your type of arthritis: Devil’s Claw for pain and inflammation, Cod Liver Oil & Glucosamine for cartilage and lubrication, Vitamin D3+K2 for bone health. Give it 12 weeks. The combined daily cost of all three from Nutrivity is less than a cup of coffee.

Related reading: Best Supplements for Joint Pain UK | Best Natural Anti-Inflammatory Supplements UK | Best Supplements for Knee Pain UK | Best Supplements for Back Pain UK | Best Supplements for Bone Density UK

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Dietary supplements are intended to complement, not replace, a balanced diet and healthy lifestyle. If you have a medical condition or are taking medication, consult your healthcare professional before starting any new supplement. All Nutrivity products are manufactured in the UK to GMP standards.

Frequently Asked Questions