Research notebook

Foods for Insulin-Resistant PCOS

2026-09-21 · 8 sources · first-party briefing

Asked: What should I eat if I have insulin-resistant PCOS?

Foods that show up as a good fit on Peach's insulin-resistant pages are mostly protein, legumes, non-starchy vegetables, and fats with no glycemic load of their own — salmon, eggs, lentils, plain yogurt, broccoli, olive oil, walnuts, spinach. The subtype label is a reading aid from our quiz and food pages, not a clinical label.

Take this briefing with you

Peach scans any meal or barcode and tells you how it sits with PCOS — plus recipes, meal plans, workouts and full cycle & symptom tracking.

Download on theApp Store

Insulin-resistant PCOS is the pattern Peach readers ask about most: meals that do not spike and crash, fiber that slows the starch, protein that holds. This notebook does not invent a new diet. It collects eight food guides whose insulin-resistant verdict is already published, then adds the glycemic table and the other three subtype notes so the briefing is honest about disagreement.

Sources in this notebook

Each chip is a published Peach food guide. The briefing below only repeats numbers and copy that already live on those pages.

Key findings

Four of the eight sources are essentially carbohydrate-free protein or fat: salmon, eggs, olive oil, walnuts.
Lentils are the standout savory carbohydrate — fiber and a low load rather than a 'no carb' rule.
Plain Greek yogurt is the dairy protein with the lowest load in this set.
Broccoli and spinach are the vegetable floor: volume and fiber without a meaningful glycemic index.
Post-pill and lean notes on these pages are often also 'good' or 'depends'; inflammatory notes sometimes flag preparation (fried fish, sweetened yogurt) rather than the food itself.

Sourced comparison

Food	GI	GL	Fiber (g)	Protein (g)
Salmon	—	—	0	25
Eggs	—	—	0	6
Lentils	32	6	12	13.5
Greek Yogurt	14	1	0	17
Broccoli	—	—	2.4	2.6
Olive Oil	—	—	0	0
Walnuts	—	—	2	4
Spinach	—	—	0.7	0.9

GI and GL come from each food page and the Sydney GI table serving where one exists. A dash means the catalog has no index — usually a protein or fat with negligible carbohydrate. Open the GL calculator.

How to read this notebook

The insulin-resistant column in the subtype block is the one this notebook was built around. If that column says 'good', the food earned its place here. 'Caution' or 'depends' on another subtype does not cancel the row — it tells you the same food is not a universal default. Open the food page for the full why.

Notes from the source pages

These paragraphs are the short answers and subtype notes already published on each food guide. They are collected here so the briefing can be read — or cited — without opening every tab.

1. Salmon

0 g fiber · 25 g protein

Salmon is a lean, high-protein fish with no significant carbohydrate, so it doesn't carry GI/GL risk the way starchy foods do. Its omega-3 content is linked to modest anti-inflammatory benefits, and its protein and healthy fat content support stable blood sugar and steady energy — making it one of the more supportive proteins across all four PCOS subtypes.

Insulin-Resistant PCOS: Good fit — Salmon has no significant carbohydrate, so it carries no GI/GL exposure on its own, and pairing it with a higher-GI food helps blunt that food's glucose response — supporting the glycemic-load-first approach this subtype benefits from most.
Post-Pill PCOS: Good fit — Salmon is a whole, nutrient-dense food with no specific red flag for this transitional subtype — a solid fit for the general repletion-over-restriction approach that tends to matter more here than any single nutrient.
Inflammatory PCOS: Good fit — Fatty fish like salmon is one of the few foods with direct evidence here: omega-3 intake is linked to modest triglyceride and testosterone reduction — real, but modest, not a guarantee.
Lean PCOS: Good fit — Salmon's protein and fat support stable blood sugar and steady energy without restriction — exactly what this subtype needs, since insulin resistance is present even at a lean weight and portion isn't the deciding factor here.

Is wild salmon better than farmed salmon for PCOS? The research behind this content doesn't include a subtype-specific comparison of wild versus farmed salmon, so no PCOS-specific claim can be made either way. Both are non-carbohydrate protein sources, so neither changes glycemic load. If mercury exposure, sustainability, or taste is your deciding factor, that's a general food-safety and preference question rather than a PCOS-specific one — worth looking into on its own terms rather than treating either option as "the PCOS choice." Either can be part of a supportive pattern.

2. Eggs

0 g fiber · 6 g protein

Eggs carry essentially no carbohydrate, so they don't move blood sugar on their own, and the older worry about dietary cholesterol and hormones hasn't held up well under closer scrutiny — across PCOS subtypes, eggs are one of the more straightforwardly favorable whole foods.

Insulin-Resistant PCOS: Good fit — With no meaningful carbohydrate content, eggs don't move blood sugar on their own and work well as a pairing food alongside higher-glycemic items like toast or fruit to soften the overall response.
Post-Pill PCOS: Good fit — As a nutrient-dense, minimally processed whole food, eggs fit the gentle repletion pattern this subtype benefits from without introducing any obvious metabolic noise.
Inflammatory PCOS: Good fit — The evidence doesn't single out eggs as an inflammatory trigger, and a whole, unprocessed protein source is generally consistent with an anti-inflammatory eating pattern rather than working against it.
Lean PCOS: Good fit — Eggs support adequate energy and protein intake without the portion anxiety that comes up with more calorie-dense or carbohydrate-heavy foods — a solid, low-friction choice for this subtype's priorities.

Do eggs raise cholesterol or affect hormones in PCOS? The dietary-cholesterol-to-blood-cholesterol link that eggs were historically blamed for has turned out to be much weaker than once believed for most people — for the majority of the population, dietary cholesterol has a modest effect on blood cholesterol levels, and there isn't good evidence tying egg consumption to androgen levels specifically in PCOS. The persistent worry about eggs and hormones in PCOS communities doesn't have strong evidence behind it, and eggs remain a reasonable, nutrient-dense protein choice across subtypes.

3. Lentils

GI 32 · GL 6 · per 150g cooked (~3/4 cup) · 12 g fiber · 13.5 g protein

Lentils are a legume with a low glycemic index (32) and a low glycemic load (6) per 150g cooked serving, plus 12g fiber and 13.5g protein. Despite containing carbohydrate, that combination makes them one of the more favorable foods across PCOS subtypes, though how they fit still depends on pairing and portion.

Insulin-Resistant PCOS: Good fit — Lentils' glycemic load is low (6 per serving) despite containing carbohydrate — GI/GL exposure matters more than carb grams here. The 12g fiber and 13.5g protein further blunt glucose response, fitting the low-GI pattern linked to HOMA-IR improvement.
Post-Pill PCOS: Good fit — Lentils are a whole, nutrient-dense food — fiber and protein-rich without ultra-processing — which fits the repletion-focused framing this subtype prioritizes during a transitional period, rather than any single post-pill-specific mechanism.
Inflammatory PCOS: Good fit — As a minimally processed, fiber-rich legume, lentils fit the whole-food, Mediterranean-style pattern associated with the anti-inflammatory approach this subtype prioritizes, though the fiber and protein content are the concrete data points here, not a specific anti-inflammatory claim.
Lean PCOS: Depends — Lentils support blood-sugar stability without requiring restriction, a genuine fit since insulin resistance persists in lean PCOS. What fits your needs depends on total energy intake and pairing, not the food itself, so portion isn't something to minimize here.

Are lentils high glycemic index? No. Lentils have a glycemic index of about 32, which sits well within the low-GI range. Their glycemic load per typical 150g cooked serving is also low, at 6. Both figures are a cross-type average — specific varieties and cook times can shift the number somewhat — but lentils as a category are consistently low-GI regardless of type.

4. Greek Yogurt

GI 14 · GL 1 · per 170g plain, whole-milk · 0 g fiber · 17 g protein

Plain Greek yogurt has one of the lowest glycemic indexes of any commonly eaten food, driven largely by its high protein content, and across PCOS subtypes it's a genuinely strong choice — the flavored, sweetened versions sold alongside it are a different food nutritionally and deserve their own look.

Insulin-Resistant PCOS: Good fit — The glycemic index and load here are both very low, and the protein content is unusually high for a dairy product, making plain Greek yogurt one of the steadier choices available for this subtype.
Post-Pill PCOS: Good fit — High protein and real nutrient density fit the gentle repletion pattern this subtype benefits from, without the metabolic noise that comes from more processed or heavily sweetened alternatives.
Inflammatory PCOS: Depends — Plain Greek yogurt itself isn't flagged as an inflammatory trigger, but the sweetened, flavored versions common on shelves carry added sugar that works against an anti-inflammatory pattern — the product matters.
Lean PCOS: Good fit — The high protein content supports adequate energy intake without the portion anxiety that comes up with more carbohydrate-dense foods — a strong, low-friction fit for this subtype's priorities.

Is Greek yogurt good for insulin-resistant PCOS? Yes, plain Greek yogurt is genuinely one of the better choices available — its glycemic index and load are both very low, largely because of its unusually high protein content for a dairy product. That combination makes it a steady option on its own and a useful pairing food alongside less favorable choices, like granola or sweetened fruit, where it can help moderate the overall blood sugar response of the meal. The important word here is plain — flavored versions change this picture substantially.

5. Broccoli

2.4 g fiber · 2.6 g protein

Yes — broccoli is a strong pick across all four PCOS subtypes. It's a non-starchy, high-fiber cruciferous vegetable with no meaningful carbohydrate load, so it doesn't carry glycemic risk. Pair it with protein or a healthy fat, especially if energy needs are a priority (as with lean PCOS), for a more complete plate.

Insulin-Resistant PCOS: Good fit — Broccoli has no significant available carbohydrate, so it carries essentially no glycemic load and won't spike blood sugar. Its fiber supports the GI/GL-conscious, Mediterranean-style pattern linked to measurable HOMA-IR improvement — a reliable base for a lower-GI plate.
Post-Pill PCOS: Good fit — A whole, nutrient-dense vegetable with no red flags for this transitional subtype. Broccoli fits the general repletion-focused, whole-food eating pattern that supports the body while cycles re-establish over time, without needing to specifically target any single metabolic marker.
Inflammatory PCOS: Good fit — Cruciferous vegetables like broccoli are polyphenol-rich, minimally processed foods consistent with the Mediterranean-style, anti-inflammatory eating pattern that's associated with modest triglyceride and testosterone improvements — a genuinely good-fit food for this subtype's elevated-hs-CRP-driven nutritional priorities.
Lean PCOS: Depends — Broccoli itself is fine, but its low energy density means it rarely stands alone as adequate fuel. Pairing it with protein, fat, or a starchy side — not restriction — is what determines fit here.

Does broccoli have a glycemic index? No — broccoli doesn't have an assigned glycemic index because it isn't a significant source of carbohydrate; standard GI tables like the University of Sydney's database only test and list foods with meaningful available carbs. That's exactly why it's such a reliable base for a lower-glycemic-load plate across PCOS subtypes, especially insulin-resistant PCOS, where the 2023 International Evidence-Based Guideline for PCOS points toward managing glycemic exposure over strict gram-counting.

6. Olive Oil

0 g fiber · 0 g protein

Yes — olive oil, especially extra-virgin, is a foundational fat in the Mediterranean eating pattern linked to PCOS benefits across insulin resistance, inflammation, and general nutrient quality. It carries no meaningful carbohydrate, so it adds no glycemic load alone, and it works well swapped in for less favorable fats in everyday cooking, dressings, marinades, and finishing dishes.

Insulin-Resistant PCOS: Good fit — Olive oil anchors the Mediterranean-pattern diet, the strongest sustainable nutrition evidence for this subtype, linked to meaningful HOMA-IR improvement. It carries no carbohydrate, so it adds zero glycemic load and pairs well with higher-GI foods to blunt their glucose response.
Post-Pill PCOS: Good fit — A whole, nutrient-dense fat that fits this subtype's gentle repletion framing well. No red flags for post-pill transition; olive oil supports overall dietary quality while the body re-establishes its own cycle, without adding processed-food burden.
Inflammatory PCOS: Good fit — Especially extra-virgin, olive oil is polyphenol-rich and central to the Mediterranean pattern most closely tied to lower inflammatory markers in the evidence base. A genuinely strong good fit for a subtype defined by elevated hs-CRP.
Lean PCOS: Good fit — An energy-dense, nutrient-rich fat that supports adequate energy intake, the priority for this subtype, while pairing well with carbohydrates to help stabilize blood sugar. Fit here is about inclusion, not restriction or portion control.

Does olive oil help with insulin resistance in PCOS? Olive oil alone doesn't directly lower insulin resistance, but it's a core component of the Mediterranean eating pattern linked in the research to measurable improvement — roughly 5–8% weight loss at 6 months and a HOMA-IR drop of 0.5–0.8 in some studies, per the evidence behind the 2023 International PCOS Guideline. It works as part of an overall dietary pattern, not as a standalone fix, and it doesn't replace any medical management your clinician has recommended.

7. Walnuts

2 g fiber · 4 g protein

Walnuts aren't a significant carbohydrate source, so no GI or GL applies to them — the main variable is portion, not glycemic impact. Their combination of omega-3 (ALA), fiber, and protein makes them a solid fit across PCOS subtypes, particularly where an anti-inflammatory eating pattern matters, with portion and pairing doing most of the work subtype to subtype.

Insulin-Resistant PCOS: Good fit — Walnuts carry no significant carbohydrate, so they don't add to glycemic load, and their fiber-protein-fat combination supports the GI/GL-exposure approach this subtype's guidance prioritizes over gram-counting. A reasonable portion pairs well with lower-GI carbs to blunt the post-meal glucose response.
Post-Pill PCOS: Good fit — As a whole, minimally processed food, walnuts fit the nutrient-dense repletion this subtype's guidance favors during the transitional window back to a regular cycle, without needing to correct any single metabolic marker the way insulin-resistant PCOS does.
Inflammatory PCOS: Good fit — Walnuts are one of the richest plant sources of omega-3 (ALA), matching this subtype's anti-inflammatory, polyphenol-and-omega-3 eating pattern built around the elevated hs-CRP marker; the effect is modest, not dramatic, but the fit is genuinely strong.
Lean PCOS: Depends — Walnuts support stable blood sugar and add real energy density, which lean PCOS needs more of, not less — insulin resistance persists here even at a lean weight. Fit depends on portion and pairing, never on limiting them for weight.

Do walnuts have a GI or GL value? No. Walnuts don't contain enough available carbohydrate to be assigned a glycemic index — standard GI databases, including the University of Sydney's, only test and list foods with meaningful available carbohydrate, and walnuts fall outside that category entirely. A 30g serving (about 14 halves) provides roughly 2g of fiber and 4g of protein, with no meaningful direct impact on blood glucose on its own.

8. Spinach

0.7 g fiber · 0.9 g protein

Spinach doesn't carry a glycemic index because it has almost no digestible carbohydrate, so it doesn't raise blood sugar the way starchy foods can. It's fiber-forward, nutrient-dense, and a reasonable fit across all four PCOS subtypes — it works best as one part of meals that also provide plenty of protein, fat, and carbohydrate.

Insulin-Resistant PCOS: Good fit — Spinach has no assigned GI because it contains negligible digestible carbohydrate, so it adds essentially no glycemic load. It's a low-GL leafy green you can eat freely alongside a Mediterranean, low-GI eating pattern without tracking portions.
Post-Pill PCOS: Good fit — A whole, nutrient-dense green fits the repletion-focused approach that's often used to support this transitional window. Spinach carries no specific red flag for post-pill PCOS and supports a general whole-food pattern while your cycle re-establishes.
Inflammatory PCOS: Good fit — Leafy greens like spinach are part of the polyphenol-rich, minimally processed eating pattern commonly associated with lower inflammatory markers in PCOS research. It's a reasonable everyday choice, though any single food's effect on inflammation is modest.
Lean PCOS: Depends — Spinach fits well in lean PCOS meals as one nutrient-dense part of a full plate — build the meal around plenty of protein, carbohydrate, and fat for adequate energy, with spinach adding micronutrients, flavor, and variety.

Does spinach raise blood sugar or count against a low-GI diet for PCOS? No — spinach doesn't have an assigned glycemic index because it doesn't contain a meaningful amount of digestible carbohydrate. Standard GI databases, including the University of Sydney's, only test foods with enough available carbohydrate to produce a measurable blood sugar response, and spinach falls below that threshold. In practice, that means spinach doesn't add glycemic load to a meal, which is useful context if you're following the low-GI, glycemic-load-focused pattern that has the strongest evidence for insulin-resistant PCOS.

Pairing notes

A plate from this notebook is a protein (salmon, eggs, yogurt, or lentils), a heap of broccoli or spinach, and olive oil or walnuts as the fat. If you want a starch, it is not in this particular source list — look at the low-GI notebook or the oats and quinoa pages and put that starch next to this protein. Walking after the meal is a separate, non-food lever Peach has written up on the blog.

Questions this notebook answers

What foods are good for insulin-resistant PCOS?

On Peach's published pages, salmon, eggs, lentils, plain Greek yogurt, broccoli, olive oil, walnuts, and spinach all carry a good-fit note for the insulin-resistant pattern. That is a starting set of sources, not an exclusive grocery list. Bread, rice, and fruit can still fit when they are paired.

Do I have to cut carbs if I am insulin resistant?

This notebook does not ask you to cut carbs. Lentils are in the source list on purpose. The repeating advice on these pages is pairing and fiber, not elimination. A registered dietitian can help if someone has told you to run a very low-carbohydrate protocol — that is outside what Peach publishes.

Does this notebook confirm insulin resistance?

No. Peach's subtype quiz and the insulin-resistant food notes are educational labels. Insulin resistance is a clinical finding. If you need to know your own status, that question belongs with a clinician and lab work, not a food notebook.

Can I use olive oil freely?

Olive oil has no glycemic index. It is a fat, not a free food in unlimited puddles, and Peach does not count energy or prescribe portions. Use it as the default dressing and cooking fat on these pages, not as a wellness shot.

Bottom line

Insulin-resistant PCOS food notes on Peach favor protein, legumes, and vegetables, not a war on carbohydrates. These eight sources are a briefing, not a closed list. The quiz can suggest a pattern; only a clinician can say what is going on in your bloodwork. Educational only — not medical advice.

Related Peach pages

This is a first-party Peach research notebook: a sourced briefing hosted on pcospeach.app, not a public Google NotebookLM and not medical advice. It does not replace a clinician. A registered dietitian can fit these foods to your own plan.