In depth
Relapsing polychondritis and diet
A systematic search for clinical practice guidelines in relapsing polychondritis found 20 citations and no guidelines. It found no nutrition study of any design either, interventional or observational.
What the research found.
A systematic literature search for clinical practice guidelines in relapsing polychondritis identified 20 citations and found no clinical practice guidelines among them.
No nutrition study of any design, interventional or observational, was found in relapsing polychondritis, and the guideline literature is empty on both diet and exercise.
That review named eleven areas of unmet need, including diagnosis strategy, therapeutic management, pregnancy, pediatric-onset disease, follow-up and screening frequency, perioperative and anesthetic management given tracheal involvement, neoplasm risk, infection prevention, disease activity and damage assessment tools, and patient-reported outcomes.
There's no diet for this, and that's a finding
A systematic literature search for clinical practice guidelines in relapsing polychondritis identified 20 citations and found no clinical practice guidelines among them. It also found no nutrition study of any design, interventional or observational. The guideline literature in this condition is empty on both diet and exercise.
That's worth separating carefully from the more usual situation. Most of the diet questions on this site have an answer along the lines of a few small trials pointing in a direction with no pooled effect size. This one is different: the question hasn't been asked in a study at all.
Our record for that review calls this a finding rather than a failure of searching, and notes that nothing published since 2018 was found to change the picture. So the absence is documented rather than assumed, which is what makes it usable. A page that said nothing would be less honest than one that says nothing is known and shows where that comes from.
What a documented absence is good for
An absence sounds like an unhelpful thing to put on a page, and it has one specific practical use. When somebody offers you a relapsing polychondritis diet, a systematic search having found no nutrition study means their protocol has no evidence in this condition behind it. That follows by definition rather than by argument.
Asking where a claim came from is always a reasonable question. Here the answer can't be a study in relapsing polychondritis, because none was found to exist. It might be a study in a different disease, a mechanism, or somebody's clinical impression, and each of those is worth knowing about and none is what a specific protocol implies.
That's the whole practical content of this page. It won't tell you what to eat, and it will let you recognize a confident claim that has nothing behind it. Given how much of that circulates for rare conditions, the second is worth more than it sounds.
Why the field is this thin
Nutrition isn't being singled out here, and seeing the wider picture makes the absence less surprising. The same review named eleven areas of unmet need in relapsing polychondritis. They include diagnosis strategy, therapeutic management, pregnancy, pediatric-onset disease, follow-up and screening frequency, perioperative and anesthetic management given tracheal involvement, neoplasm risk, infection prevention, disease activity and damage assessment tools, and patient-reported outcomes.
That's a list covering almost everything a clinician would want settled. A condition without an agreed way to measure its own disease activity isn't a condition in which somebody was ever going to run a dietary trial. The order in which research questions get answered isn't arbitrary.
The rarity of the condition is the underlying reason. Rare disease research is limited by how many patients can be recruited, and the questions that get asked first are the ones about diagnosis and treatment. Diet sits a long way down that queue.
What that leaves you with
Eating well has general benefits that don't depend on any diagnosis, and none of what's above argues against it. What this page can't do is tell you that a particular picture of eating will change your relapsing polychondritis, because nothing published has tested one. Both of those statements hold at the same time.
The direction worth being careful in is restriction. A restrictive diet has a real nutritional cost, and here there's no established benefit to weigh against it. If you want to try something, doing it with your team's knowledge and for a defined period is a better plan than an indefinite restriction adopted alone and never reviewed.
Our record notes one further thing worth knowing. A trial registration for physical training in relapsing polychondritis exists on trial registries, with no published results paper found. That's exercise rather than nutrition, and a registration without results can't support a claim, which is why it isn't treated as evidence anywhere on this site.
The thing from that review that isn't about diet
One item on the unmet needs list deserves lifting out, because it's the most consequential thing in the source this page rests on. Perioperative and anesthetic management appears there as an area of unmet need, specifically because of tracheal involvement in this condition. That has nothing to do with diet and everything to do with safety.
Relapsing polychondritis affects cartilage, and the airway is made of cartilage. That makes procedures requiring airway management a specific consideration in a way it isn't in most rheumatic disease. The review flags it as something the literature hasn't settled.
Mentioning it to anyone planning a procedure is worth doing even if it seems obvious that they'd know. It's on this page rather than only on the condition hub because a reader who came here for a diet question may not read the rest of the site. Of everything in the one source we hold, this is the item most worth carrying away.
Common misconceptions.
Myth. There must be an anti-inflammatory diet for this.
Reality. Nobody has studied one. A systematic search of the guideline literature in relapsing polychondritis found 20 citations, no clinical practice guidelines, and no nutrition study of any design. That's not the same as a diet having been tested and failed. It means the question has never been asked in a study, which is a different and less common situation than most conditions are in.
Myth. Advice for other autoimmune diseases will apply here.
Reality. It may and nothing establishes that it does, which is worth knowing before adopting it. Relapsing polychondritis affects cartilage, including in the airway, and the review that searched for guidance flagged perioperative and anesthetic management as an area of unmet need because of tracheal involvement. A condition that unusual is a poor candidate for borrowed dietary advice presented as though it were specific.
Myth. Somebody selling a protocol for this must know something.
Reality. The published literature says otherwise, and this is the practical use of a documented absence. When a systematic search finds nothing, a confident protocol has no evidence behind it by definition. Asking where a claim came from is always reasonable, and here the answer can't be a study in this condition, because none exists.
Myth. No evidence means diet doesn't matter.
Reality. That's the opposite error and it doesn't follow either. An absence of studies means nobody knows, not that nothing is happening. Eating well is worth doing for general reasons that have nothing to do with this diagnosis, and this page can't tell you it will change your disease. Both of those statements are true at once.
Cautions specific to this condition.
- Ask for the reference behind any relapsing polychondritis diet you're offered, because a systematic search of the literature found no nutrition study of any design in this condition.
- Raise nutrition with your rheumatology team rather than treating it as settled in either direction, since the absence of evidence leaves it a clinical judgment rather than a protocol.
- Mention airway symptoms to anyone planning a procedure, because the review searching for guidance flagged perioperative and anesthetic management as an area of unmet need given tracheal involvement.
- Nothing here establishes a benefit from cutting foods out, and the nutritional cost of restriction is real. Those two together are why this page says what it says.
Discuss any change with the rheumatologist who manages your care. Nothing here replaces that conversation.
Questions patients ask.
Is there a diet for relapsing polychondritis?
No, and this is one of the few conditions where the answer is that definite. A systematic literature search for clinical practice guidelines identified 20 citations and found no guidelines, and no nutrition study of any design was found in this condition. That's a documented absence rather than a case of the evidence being mixed or weak.
How can you be sure nothing exists?
Because a published systematic search looked and reported what it found. That review of the guideline literature in relapsing polychondritis is the source for the whole of this page, and its own conclusion is that no clinical practice guidelines exist. Our record notes this is a finding rather than a failure of searching, and that nothing published since 2018 was found to change the picture.
So what should I eat?
That's a question for your team rather than something this page can answer, and the honest reason is that nobody has studied it in this condition. Eating well has general benefits that don't depend on a diagnosis. What this page can't do is tell you that a particular way of eating will change your relapsing polychondritis, because no study has tested one.
Can I follow advice written for other autoimmune conditions?
You may, and nothing establishes that it transfers. This condition affects cartilage, including in the airway, which makes it clinically unlike inflammatory arthritis in ways that could matter. Borrowed advice presented as specific to relapsing polychondritis is the thing to be careful about, more than borrowed advice honestly labeled as borrowed.
Should I try eliminating foods?
This site holds no source on elimination diets in this condition, and restriction carries a real nutritional cost. Nothing published establishes a benefit to weigh against that cost. If you want to try something, doing it with your team's knowledge and for a defined period is a better plan than an indefinite restriction adopted alone.
Why is there so little research?
Because the condition is rare, and the review that searched for guidance found the whole field thin rather than nutrition specifically neglected. It named eleven areas of unmet need, from diagnosis strategy and therapeutic management through to disease activity assessment tools and patient-reported outcomes. Diet sits inside that larger absence.
Is anything being studied?
Our record notes that a trial registration for physical training in relapsing polychondritis exists on trial registries, with no published results paper found. That's exercise rather than nutrition, and it isn't given its own entry here because a registration without results can't support a claim. Nothing comparable was found for diet.
References.
- Rednic S; Damian L; Talarico R et al. Relapsing polychondritis: state of the art on clinical practice guidelines. RMD Open. 2018;4:e000788. 10.1136/rmdopen-2018-000788Systematic literature review for clinical practice guidelines in relapsing polychondritis
This page gathers the published research on this subject into one place. The studies behind it were published between 1989 and 2026, and every figure links to the paper it came from. Those studies were peer reviewed. This summary of them was not. Dr. Sarah Luebker is reviewing these pages one at a time and has not reached this one yet, so it carries no medical review date and nothing here is her opinion or her advice to you. Each page gets updated as she reaches it. It is here in the meantime because the science is worth having in one organized place that is easy to find and easy to read. Talk to your own clinician before acting on any of it.