Offered the gel injections for my knee. Are they actually worth it or am I paying for hope?

Right knee osteoarthritis, mid fifties, still cycling most days which is the one thing that never seems to flare it. But walking and standing at work are getting harder and the physio mentioned I could try the gel injections (hyaluronic acid, viscosupplementation, the lubricant ones, not the steroid).

Here's my problem. I've had two steroid injections over the last couple of years, first one great, second one meh, and now the clinic is quoting me a fair bit of money for a COURSE of these gel ones, three injections a week apart, all private because apparently the NHS won't fund them. And when I asked the obvious question, does it work, I got a very careful "some people find it helpful" which is the sort of answer that makes my wallet nervous.

So before I hand over the money: did the gel actually do anything for you? How long did it last? And is it normal that it's not on the NHS, because that on its own is making me wonder if I'm buying hope.

I'm the cautionary tale on these. When my steroids started wearing off faster I tried the gel next, hoping it was a different answer. It wasn't a different answer, it took the edge off for a while and it is not cheap. I don't regret trying it, I regret expecting it to turn back the clock.

One thing nobody warned me: it's SLOW. The steroid I could feel working in a couple of days. The gel did basically nothing for the first two or three weeks and I'd half written it off before it crept in. So don't judge it at day five like I nearly did.

Never tried the gel myself, but the frame I use for anything like this: what am I actually buying, and for how long. A steroid buys me a few good weeks in a flare, known quantity. The gel is a maybe, slower, dearer, and the honest studies I've seen are all over the place. That doesn't make it useless, it made me want a straight expectation before paying, which is exactly what you're asking for. Fair play.

I went the other way with the same money, for what it's worth. When mine got harder I put the cash towards a proper block of physio and getting my technique on stairs and hills sorted, and that has held far longer than any injection ever did for me. Not saying the gel is wrong for you, cycling clearly loves your knee so you're already doing the strengthening bit, just that the injection isn't the only thing you can spend on.

Worth giving you the straight version, because "some people find it helpful" is accurate but not much use when you're deciding.

Direct answer: hyaluronic acid injections have genuinely mixed and, on average, modest evidence. Across large studies the typical improvement in pain over a dummy injection is small, yet a subset of people clearly do respond and get several months of useful relief. That average-versus-individual gap is the whole difficulty: there is no reliable way to predict in advance which camp you'll fall into. That uncertainty is exactly why NICE does not recommend them as a routine treatment, and why they're rarely NHS funded, so you're right that the funding picture is telling you something real. It isn't a scam, it's a treatment with weak average evidence.

The conditions that shift the odds: the gel tends to do more for earlier, milder wear than for a badly worn bone-on-bone joint, and Maureen's point about timing is important, it's a lubricant, not an anti-inflammatory, so it builds slowly over two to four weeks rather than working in days like a steroid. When it helps it can last in the region of six months, sometimes a bit more, and a course is typically one to five injections a week apart, or a single larger dose depending on the product. If a first course does little, repeating it rarely changes the story. The site's guide to hyaluronic acid injections for knee arthritis lays out the evidence, and corticosteroid injections for knee pain covers how the two differ.

Given you're already cycling daily and getting no flare from it, you have the single best-supported treatment running well. A time-limited trial of the gel is a reasonable thing to try with clear eyes, but I'd agree it with your clinician as an experiment with a defined review point, not an open-ended spend. And what it can't do is decide anything about your knee's future for you, which is a conversation for your own examination and imaging.

Thanks all, this was exactly the reality check I needed. Decided to do ONE course of the gel, eyes open, treating it as an experiment with a review date like Mr Henderson said, and I've told myself not to judge it before the four week mark this time (thank you Maureen). Also booked a couple of physio sessions with Sue's logic in mind, because that money's better evidenced and the bike clearly agrees with the strengthening idea. Will report back once the gel's had time to either do something or not.