Joint pain after 50, by the evidence: what works for osteoarthritis and what does not

If your knees, hips, or hands have started to ache with age, the most likely cause is osteoarthritis. It is the most common form of arthritis and a leading source of chronic pain and disability, affecting an estimated 32.5 million US adults (Osteoarthritis Action Alliance, drawing on CDC data). Incidence climbs sharply around age 50, and it becomes more common with age. This guide summarizes what the strongest evidence and the two leading guidelines, from the Osteoarthritis Research Society International (OARSI, 2019) and the American College of Rheumatology and Arthritis Foundation (ACR/AF, 2019), report about what helps and what does not. It is evidence reporting, not medical advice.

What osteoarthritis is

The old picture of osteoarthritis as simple “wear and tear,” where cartilage grinds down like a worn tire, is outdated. Researchers now describe it as a disease of the whole joint. Cartilage breaks down, but the underlying bone changes too, the joint lining can become inflamed (synovitis), and ligaments and surrounding muscle are affected. That matters because inflammation and joint mechanics, not just cartilage thickness, drive symptoms. It also explains why the amount of damage on an X-ray often does not match how much pain a person feels.

The approaches with the strongest evidence

Both guidelines agree on the foundation, and it is not a pill. Exercise, self-management and education programs, and weight loss for people carrying extra weight are the core treatments (OARSI, 2019; ACR/AF, 2020).

Exercise. The ACR guideline strongly recommends exercise for knee, hip, and hand osteoarthritis, one of its highest-rated interventions (Kolasinski et al., Arthritis & Rheumatology, 2020). Walking, strengthening, neuromuscular training, and water-based exercise all help, with no clear winner among them. Benefits are better when exercise is supervised, and they can last up to a year. The main caveat the panel noted is that trials cannot yet specify the ideal type or dose for a given person.

Weight loss. For those who are overweight, losing weight reduces load on the joint and lowers inflammation. In the IDEA randomized trial of 454 older adults with knee osteoarthritis, the group that combined intensive diet with exercise lost about 10 percent of body weight and had greater reductions in pain and better function than exercise alone, along with lower knee joint loads and inflammatory markers (Messier et al., JAMA, 2013). The ACR summary notes that even a 5 percent loss can ease knee and hip pain.

Topical and oral NSAIDs. Anti-inflammatory medicines are the pharmacologic mainstay. Topical NSAIDs are strongly recommended for knee osteoarthritis and are attractive with age because they carry a much lower risk of stomach, kidney, and cardiovascular side effects than pills. A Cochrane review found roughly 60 percent of people got at least a 50 percent reduction in pain with topical NSAIDs, comparable to oral versions (Derry et al., Cochrane Database, 2016). Oral NSAIDs are also strongly recommended but warrant more caution over 50, especially for anyone with heart, kidney, or gastrointestinal risk.

What is overrated

Glucosamine and chondroitin. These are among the most-purchased joint supplements, yet the ACR strongly recommends against glucosamine for knee and hip osteoarthritis, noting that benefit disappears in trials without industry funding (Kolasinski et al., 2020). A large network meta-analysis in the BMJ found that glucosamine, chondroitin, and their combination did not produce a clinically meaningful reduction in joint pain compared with placebo (Wandel et al., BMJ, 2010). Evidence across later reviews remains mixed and small at best. Most other over-the-counter joint supplements have thin or inconsistent evidence.

Injections: mixed and often oversold

Corticosteroid injections can ease pain in the short term and are conditionally supported by guidelines. But a two-year randomized trial found that quarterly steroid injections produced greater cartilage volume loss and no better pain relief than saline placebo (McAlindon et al., JAMA, 2017). That does not rule out occasional use for a flare, but it argues against repeated, routine injections.

Hyaluronic acid (viscosupplementation) has fared poorly under scrutiny. A large systematic review in the Annals of Internal Medicine concluded the benefit is small and clinically irrelevant, with a signal of increased harm (Rutjes et al., 2012). The ACR recommends against it for knee osteoarthritis.

Platelet-rich plasma (PRP) is heavily marketed but weakly supported. In the RESTORE randomized trial, PRP was no better than saline placebo for pain or cartilage volume at 12 months (Bennell et al., JAMA, 2021). The ACR recommends against PRP, citing a lack of standardization and unproven benefit.

Where surgery fits

Two messages here are clear. First, arthroscopy (keyhole surgery to clean out the joint) is not recommended for osteoarthritis. A landmark sham-controlled trial found arthroscopic surgery no better than placebo surgery (Moseley et al., NEJM, 2002), and a later trial found no added benefit over physical and medical therapy (Kirkley et al., NEJM, 2008).

Second, joint replacement works for end-stage disease. In a randomized trial, total knee replacement plus rehabilitation improved pain and function more than nonsurgical care alone, with a KOOS4 difference of 15.8 points (Skou et al., NEJM, 2015). The trade-off is real: the surgery group had more serious adverse events (24 versus 6). Notably, the nonsurgical group also improved substantially, which is why replacement is generally reserved for severe, disabling arthritis after conservative care has been tried.

How to read this hub

The pattern across the evidence is consistent. The least glamorous options, moving more, losing excess weight, and using the right anti-inflammatory when needed, carry the strongest support, while many popular add-ons do not hold up. The spoke articles in this hub go deeper on each topic: exercise programs for knee and hip osteoarthritis, weight loss and joint pain, topical versus oral NSAIDs and their risks after 50, the supplement evidence in detail, a closer look at each injection type, and how to weigh joint replacement.

This article is evidence reporting and not medical advice. Treatment decisions, including any medication or procedure, should be made with a qualified clinician who knows your full health history.

Common questions

Is osteoarthritis just wear and tear from getting older?

No. Researchers now describe osteoarthritis as a disease of the whole joint, involving cartilage breakdown, changes in the underlying bone, inflammation of the joint lining, and effects on surrounding muscle and ligaments. Age is a major risk factor, but the process is more active than passive grinding, which is one reason the damage seen on an X-ray often does not match a person’s level of pain.

What is the single most effective thing for osteoarthritis pain?

There is no single fix, but the treatments with the strongest and most consistent evidence are exercise, self-management education, and weight loss for those carrying extra weight. Both the OARSI and ACR guidelines rank these as core treatments. Exercise is strongly recommended for knee, hip, and hand osteoarthritis and works best when supervised.

Do glucosamine and chondroitin supplements work?

The best evidence says no meaningful benefit. The 2019 ACR guideline strongly recommends against glucosamine for knee and hip osteoarthritis, and a large BMJ network meta-analysis found glucosamine, chondroitin, and the combination did not reduce joint pain more than placebo in a clinically meaningful way. Results across studies are mixed and small at best.

Are cortisone or other injections worth it for knee arthritis?

The evidence is mixed. Corticosteroid injections may relieve pain short term, but a two-year trial found repeated injections led to more cartilage loss and no better pain relief than placebo. Hyaluronic acid injections show small, likely clinically irrelevant benefit, and platelet-rich plasma was no better than saline placebo in the RESTORE trial. Guidelines recommend against routine hyaluronic acid and PRP for the knee.

When is surgery appropriate for osteoarthritis?

Arthroscopy (keyhole clean-out surgery) is not recommended for osteoarthritis, because randomized trials show it is no better than sham surgery or nonsurgical care. Joint replacement, by contrast, is effective for severe, end-stage disease and improved pain and function more than nonsurgical treatment in a randomized trial, though it carries a higher risk of serious complications. It is generally reserved for disabling arthritis after conservative care.