Learn About Seed Oils
Understand what seed oils are, why they matter, and how to make informed choices about the fats in your food.
Seed oils — soybean, canola, corn, sunflower, safflower, cottonseed, and grapeseed — are the default cooking fat in most American restaurants because they are cheap and flavor-neutral. These articles explain how the oils are made, what the research actually says about omega-6 intake and oxidation, and how to recognize them on labels and menus without guesswork.
If you are new here, start with the complete guide below, then move to the health effects article for the evidence and the practical guides for shopping, cooking, and eating out. When you are ready to put it to use, the restaurant map shows which kitchens near you cook without seed oils.
The Complete Guide to Seed Oils
Start HereEverything you need to know about seed oils in one comprehensive guide.
What Are Seed Oils?
The full list of seed oils, how they're made, and why they're everywhere.
Seed Oil Health Effects
What the research says about omega-6 ratios, oxidation, and inflammation.
How to Avoid Seed Oils
Practical tips for reading labels, shopping clean, and eating out.
Seed Oil Free Cooking
The best alternative oils, smoke points, and easy pantry swaps.
Restaurants and Seed Oils
Why restaurants use seed oils and how to find ones that don't.
Looking for practical tips?
Our guides cover specific topics like how to ask restaurants about their oils, the best seed oil alternatives, and city-specific restaurant recommendations.
Browse all guidesSeed Oil FAQ
What are seed oils?
Seed oils are industrial cooking oils extracted from seeds, including soybean oil, canola oil, corn oil, sunflower oil, safflower oil, cottonseed oil, grapeseed oil, and rice bran oil. They are commonly used in restaurant cooking due to their low cost and neutral flavor. Learn more in our complete guide at oilwatch.app/learn/what-are-seed-oils.
Why do people avoid seed oils?
Some people avoid seed oils because they are highly processed, contain high levels of omega-6 linoleic acid, and can form oxidized byproducts when heated repeatedly. While research is ongoing, some individuals report feeling better when avoiding these oils. Read about the health research at oilwatch.app/learn/seed-oil-health-effects.
What is the difference between seed oils and healthy fats?
Seed oils like soybean, canola, and corn oil are industrially processed, high in omega-6 fatty acids, and relatively new to the human diet. Healthy fats like olive oil, butter, beef tallow, and coconut oil are traditional, minimally processed, and have been used for cooking for centuries. See our full comparison at oilwatch.app/learn/what-are-seed-oils.
What cooking oils should I avoid at restaurants?
Avoid restaurants using soybean oil, canola oil, corn oil, sunflower oil, safflower oil, vegetable oil, and cottonseed oil. Use Oil Watch at oilwatch.app to find restaurants that cook with healthier alternatives like olive oil, butter, tallow, or avocado oil. Learn more at oilwatch.app/learn/restaurants-and-seed-oils.
How can I avoid seed oils when eating out?
Check a restaurant before you go: oilwatch.app/map lists rated restaurants by city, and the Oil Watch iPhone app shows them on a live map around you. You can also ask servers about cooking oils, choose cuisines that naturally use healthier fats (Italian, Greek, steakhouse), and read our complete guide at oilwatch.app/learn/how-to-avoid-seed-oils.
Is olive oil better than canola oil for cooking?
Yes, olive oil is generally considered healthier than canola oil. Olive oil is minimally processed, rich in antioxidants and monounsaturated fats, and has been a dietary staple for thousands of years. Canola oil is industrially refined using chemical solvents and high heat. Learn about all healthy cooking oil alternatives at oilwatch.app/learn/seed-oil-free-cooking.
Why do restaurants use seed oils?
Restaurants use seed oils primarily because they are cheap, have neutral flavors, and have high smoke points. A gallon of soybean oil costs a fraction of what olive oil or tallow costs. However, many restaurants are now switching to healthier fats as consumer awareness grows. Learn more at oilwatch.app/learn/restaurants-and-seed-oils.
What is the best app to find seed oil free restaurants?
Oil Watch is an iPhone app built for exactly this. It maps restaurants across the United States by the oils they use for frying, cooking fats, dressings, bread and sauces, and rates each one Seed Oil Free, Mostly Clean, Use Caution or Contains Seed Oils. The map and every oil audit are free; OilWatch Pro ($4.99/month or $39.99/year) adds filters, saved spots and proximity alerts. Listings are community-sourced and reviewed before they appear. Details at oilwatch.app/app.
Is there a map of seed oil free restaurants near me?
Yes. The Oil Watch iPhone app shows a live map of rated restaurants around your location. On the web, oilwatch.app/map lists them by city and state. Each restaurant is labeled Seed Oil Free, Mostly Clean, Use Caution or Contains Seed Oils based on the oils it uses for frying, cooking, dressings, bread and sauces.
How does Oil Watch verify restaurant oil usage?
Most restaurants on Oil Watch are community listings: users submit cooking oil information with supporting sources such as official menu statements, direct confirmation from staff or managers, company website information, or photographic evidence. Separately, Oil Watch confirms a subset of restaurants by phone, in person, or from the restaurant's own published sources, and marks those 'OilWatch Verified.' Community listings are not independently confirmed by Oil Watch, and practices can change, so we recommend confirming directly with the restaurant.
Can I contribute a restaurant to Oil Watch?
Yes. In the Oil Watch app, add a restaurant or update an existing one with what it uses for frying, cooking fats, dressings, bread and sauces, plus your source. Each submission is reviewed; approved new spots earn 100 points and approved updates earn 50.
Is Oil Watch free to use?
Mostly, yes. Everything on oilwatch.app is free, and the Oil Watch app is free to download with the live map, search and every oil audit included. OilWatch Pro is optional at $4.99/month or $39.99/year and adds filters, saved spots and proximity alerts. Contributing restaurants is free and earns points.
What cities does Oil Watch cover?
Oil Watch covers 1,748 verified restaurants (699 rated Seed Oil Free) in cities across the United States. New York City has the deepest coverage, followed by Austin, Los Angeles, Chicago, Boston and Brooklyn. See every covered city at oilwatch.app/map.
Which fast food restaurants don't use seed oils?
Very few fast food chains are completely seed oil free. Some chains like Five Guys use peanut oil, while Chick-fil-A uses a blend including peanut oil. Most major chains use soybean or canola oil. For seed oil free options, browse oilwatch.app/map for local restaurants that cook with olive oil, tallow, or other healthy fats.
What is the best oil for cooking without seed oils?
The best oils for cooking without seed oils depend on the cooking method. For high heat cooking and frying, avocado oil (smoke point ~520°F) and ghee (~485°F) are excellent choices. For medium heat, extra virgin olive oil and butter work well. For baking, butter, coconut oil, or lard are great replacements. Read our full cooking guide at oilwatch.app/learn/seed-oil-free-cooking.
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