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Which Oil Is Best for PCOS? 7 Compared
Short answer: Most oils carry little carbohydrate, so glycemic index doesn't separate these 7 options; protein, fat and portion do. Canola Oil has the most protein per serving here. Canola Oil and Olive Oil are rated a good fit for all four PCOS subtypes. No single oil is right for everyone with PCOS: serving size, preparation and your subtype change the picture, so each one is broken down below.
At a glance
- Canola Oil — no GI assigned (little carbohydrate) · 0 g fiber · 0 g protein · full breakdown
- Olive Oil — no GI assigned (little carbohydrate) · 0 g fiber · 0 g protein · full breakdown
- Avocado Oil — no GI assigned (little carbohydrate) · 0 g fiber · 0 g protein · full breakdown
- Butter — no GI assigned (little carbohydrate) · 0 g fiber · 0 g protein · full breakdown
- Ghee — no GI assigned (little carbohydrate) · 0 g fiber · 0 g protein · full breakdown
- Sesame Oil — no GI assigned (little carbohydrate) · 0 g fiber · 0 g protein · full breakdown
- Coconut Oil — no GI assigned (little carbohydrate) · 0 g fiber · 0 g protein · full breakdown
How each oil fits the four PCOS subtypes
Canola Oil
Canola oil contains no carbohydrates, so blood-sugar impact isn't the primary nutritional question for PCOS. Instead, it's about fat quality: predominantly monounsaturated with meaningful alpha-linolenic acid (a plant-based omega-3), canola fits most PCOS subtypes well, especially in a Mediterranean-style cooking pattern. The online 'seed oil' debate often misses this distinction.
- Insulin-Resistant PCOS: Good fit
- Post-Pill PCOS: Good fit
- Inflammatory PCOS: Good fit
- Lean PCOS: Good fit
Read the full canola oil guide
Olive Oil
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
- Post-Pill PCOS: Good fit
- Inflammatory PCOS: Good fit
- Lean PCOS: Good fit
Avocado Oil
Avocado oil is a pure fat with no significant carbohydrate, so it doesn't carry a glycemic index or load like most foods on this site do. Its monounsaturated fat profile is comparable to olive oil, making it a reasonable, versatile cooking fat across PCOS subtypes, with format — refined versus cold-pressed — mattering most for inflammatory-focused goals specifically.
- Insulin-Resistant PCOS: Good fit
- Post-Pill PCOS: Good fit
- Inflammatory PCOS: Depends
- Lean PCOS: Good fit
Read the full avocado oil guide
Butter
Butter brings rich flavor, fat-soluble vitamins and no glycemic load at all, so it slots into a PCOS day easily — melted over vegetables, on toast beside eggs, stirred through warm grains. Pair it with fiber and protein and it works happily alongside the olive oil a Mediterranean pattern leans on.
- Insulin-Resistant PCOS: Depends
- Post-Pill PCOS: Good fit
- Inflammatory PCOS: Depends
- Lean PCOS: Good fit
Ghee
Ghee (clarified butter) carries essentially no carbohydrate, so it isn't assigned a glycemic index and doesn't add glycemic load on its own. It's best treated like butter: a concentrated, lactose-free cooking fat used in moderation, not a foundation food — fit varies more by fat-quality pattern than by blood sugar.
- Insulin-Resistant PCOS: Depends
- Post-Pill PCOS: Good fit
- Inflammatory PCOS: Depends
- Lean PCOS: Good fit
Sesame Oil
Sesame oil is a pure fat with zero carbohydrate, so it has no glycemic load of its own — GI and GL aren't measured for it. Its fit for PCOS depends less on the oil itself and more on what it's replacing in a dish and how that dish is otherwise built.
- Insulin-Resistant PCOS: Good fit
- Post-Pill PCOS: Good fit
- Inflammatory PCOS: Depends
- Lean PCOS: Depends
Read the full sesame oil guide
Coconut Oil
Coconut oil carries no carbohydrate, so glycemic load isn't the concern here. Its main PCOS-relevant trait is a higher saturated-fat content than olive or avocado oil. Used for flavor or high-heat cooking it fits into most eating patterns; olive or avocado oil carries stronger supporting evidence as an everyday fat, and coconut oil still has a place.
- Insulin-Resistant PCOS: Depends
- Post-Pill PCOS: Good fit
- Inflammatory PCOS: Use with caution
- Lean PCOS: Depends
Read the full coconut oil guide
Reading these numbers
Glycemic index (GI) ranks how quickly a food's carbohydrate raises blood glucose compared with pure glucose. Glycemic load (GL) multiplies that by the carbohydrate in a real serving, so it is usually the more useful number for an actual plate. Foods with little carbohydrate have no GI assigned at all. Servings differ between foods, and cooking method, portion size and what you eat alongside all change the real-world effect.
This page compares Peach's individual food guides side by side. It isn't medical advice, and a clinician or registered dietitian can help you fit these foods to your own plan.