Do glucosamine and turmeric actually do anything for an arthritic knee, or is it money down the drain?

Right, supplements. I've been putting off asking this because I suspect the answer is "you've wasted forty quid" but here goes. Diagnosed with osteoarthritis in the right knee back in March, 58, the wear is on the inner side.

The chemist and about three magazines have all steered me toward glucosamine, and the woman in the shop was fairly confident it would help REBUILD the cartilage over time, which sounded brilliant until I got home and started reading and now I can't tell if that's a real thing or shop patter. There's also glucosamine sulfate and glucosamine hydrochloride on the shelf, different prices, no idea if the difference matters or if I'm being upsold. And then a mate swears blind that turmeric capsules did more for his knees than anything the doctor gave him.

So the honest questions. Does any of this actually do something, or is it hope in a bottle? Does it genuinely rebuild cartilage or was that just a sale? And if it's worth a punt, how long do you give it before you decide it's doing nothing? I'd rather hear it from people who've actually swallowed the things for years than from the magazines.

Ten years in, both knees, so I've done the full supplements tour and spent a fair bit doing it. My honest experience: glucosamine did nothing I could measure. I took it religiously for the best part of a year early on, stopped when money got tight, and felt exactly the same off it as on it. That's just me, mind, not a study.

Turmeric I'm slightly less dismissive about. I take it now, and I THINK the knees are a touch less grumpy in the mornings, but I've also lost weight and kept up the exercise bike over the same period, so I genuinely can't tell you which one gets the credit. Could easily be I'm paying to feel virtuous.

The one thing I'd flag before you spend: the shop lady's cartilage line. I heard the same pitch and it turns out to be the bit that isn't really true. Worn cartilage doesn't grow back because you swallowed a capsule. Wait for Mr Henderson on that, he explains it properly, but don't buy it EXPECTING to regrow anything.

quote: {author: dennis-r, text: "Does it genuinely rebuild cartilage or was that just a sale?"}

That exact promise is what got me buying them years ago, so you're not daft for asking. I'm the type who tried everything hoping for a different answer, and supplements were on the list.

My take after all that: turmeric is cheap enough that I kept taking it because on balance my mornings seem a little easier, and if that's the placebo talking then it's a placebo I can afford. Glucosamine I gave a proper three month run and quietly dropped, felt no different. What I'd say to you is decide your budget first and give whatever you pick a fair trial rather than swapping every fortnight, because chopping and changing you'll never know what did what. And do mention it to the pharmacist, I take a couple of other things and it turns out some of these interact more than you'd think.

Let me give you the straight version, because this is one where the marketing has run well ahead of the evidence.

Short answer: for most people the popular supplements do very little for the underlying arthritis, and none of them rebuild worn cartilage. That last point matters, so I'll be blunt about it. Once articular cartilage is lost in an osteoarthritic knee it does not regrow because you swallow a capsule, whatever the label implies. The building-block logic (cartilage contains glucosamine, so eating glucosamine must rebuild it) is intuitive and wrong; that isn't how the joint works. Guideline bodies reflect this. NICE does not recommend glucosamine or chondroitin for osteoarthritis, and the American Academy of Orthopaedic Surgeons rates the evidence for them as weak. That is also why they aren't routinely prescribed rather than there being some conspiracy to withhold a cure.

Now the honest nuance, because "doesn't rebuild cartilage" is not the same as "does nothing for anyone." A few things genuinely depend on specifics:

The form is not just an upsell. The trials that showed any signal at all mostly used glucosamine sulfate, not the hydrochloride, so if you are going to try it, that distinction is real. Even in the better studies the average pain improvement was small, on the order of a point or two on a ten point scale, and often inside the range you would expect from a placebo. That is not nothing to the individual who responds, but it is a long way from the miracle on the packaging.

Turmeric is the more interesting one lately. The active part is curcumin, absorption from ordinary turmeric is poor, and some formulations are made specifically to get more of it into the blood. A handful of reasonably conducted trials have shown modest pain relief from curcumin extracts, comparable in some to low dose anti-inflammatories but with fewer stomach effects. The evidence base is still thin and shorter term than I'd like, so I file it under "plausible and low risk" rather than "proven."

Two practical points readers here already touched on. First, timing: if you are going to run the experiment, give it a genuine 8 to 12 weeks before judging, changing one thing at a time so you actually learn something, exactly as Maureen described. Second, safety, and this is the bit people skip. Glucosamine is commonly derived from shellfish, which matters if you have that allergy, and both glucosamine and high dose curcumin can interact with blood thinners such as warfarin. Whether they are sensible alongside your other medication is a question for your own pharmacist or doctor who can see your full list, not for me across a forum.

Where I land: these are low risk and, for a mild knee, a reasonable thing to trial with clear eyes and a fixed budget, as one small part of the portfolio rather than the fix. The site's rundown of the alternatives to knee replacement sets out honestly what each option is worth, and the background on knee osteoarthritis explains why the cartilage-rebuilding claim doesn't hold up. Just don't let a bottle become the reason a knee that needs proper assessment doesn't get one.

Thanks all, that's the clarity I was after, even if half of it wasn't what I wanted to hear. The cartilage thing being a myth is oddly a relief, because I'd built it up into "this is my one chance to fix it" and was ready to spend accordingly.

Where I've landed: bought the glucosamine sulfate (the actual sulfate, having read the labels properly this time) and a curcumin one, going to give the pair a fair eight weeks alongside the walking and see if there's a real difference, budget capped so I'm not throwing good money after hope. Checked with the pharmacist first, no clashes with what I take, which I'd genuinely not have thought to do a month ago. Not expecting a miracle. Will report back either way.