Kit KittlestadApr 7, 2025 7 min read

Is Cooking Oil Bad For You? Best and Worst Oil to Use

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Cooking oil is an essential part of the kitchen, yet choosing the right one can feel a little daunting. With so many options out on the market, it’s easy to wonder: which oils are best for your health? Which ones add the most flavor? And, are some oils better suited for certain types of cooking than others? What do you say we lay all that to rest? Together, let’s dive into the world of cooking oils to help you navigate your next culinary masterpiece.

Choose the Right Cooking Oil

Cooking oils come from a variety of sources: seeds, nuts, fruits, and plants. Each oil has its own unique flavor profile, smoke point, and nutritional benefits. And, the truth is, some oils are more versatile, while others are best reserved for specific cooking methods or dishes.

When evaluating oils, here are two key factors to consider:

  1. Smoke Point: This is the temperature at which an oil begins to burn and break down, releasing harmful compounds and altering its flavor. High-smoke-point oils are better for frying and sautéing, while low-smoke-point oils are ideal for dressings and drizzles.

  2. Fat Composition: Oils are typically made of a mix of saturated, monounsaturated, and polyunsaturated fats. While all fats have their place in a balanced diet, monounsaturated and polyunsaturated fats are often considered healthier.

The Best Cooking Oils

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The best way to untangle all the options is to do a basic rundown of the most popular oils. Together, let’s breeze through each variation, its health benefits, flavor profile, and the best dishes to pair it with. 

Extra Virgin Olive Oil (EVOO)

  • Health Benefits: Often considered the healthiest cooking oil, EVOO is packed with heart-healthy monounsaturated fats and antioxidants. Notably, it’s a staple of the Mediterranean diet. It’s also been linked to reduced inflammation, improved heart health, and longevity.

  • Flavor Profile: Rich and slightly peppery, with fruity undertones.

  • Best For: When using olive oil for cooking, drizzle it over salads, dipping bread, or lightly sautéed vegetables. Its lower smoke point (around 375°F) makes it less suitable for high-heat cooking.

Avocado Oil

  • Health Benefits: This, too, is often considered to be the best cooking oil because avocado oil is rich in monounsaturated fats and vitamin E. It’s also known for its potential to improve skin health and support cardiovascular health.

  • Flavor Profile: Mild and buttery, without overpowering other ingredients.

  • Best For: Avocado oil for cooking is best suited for high-heat dishes that require frying or grilling because of its high smoke point of around 520°F. It’s also great for dressings.

Coconut Oil

  • Health Benefits: While it’s high in saturated fats, coconut oil for cooking has medium-chain triglycerides (MCTs), which may provide a quick burst of energy and support brain health.

  • Flavor Profile: Sweet and tropical, with a subtle coconut aroma.

  • Best For: Coconut oil is best for baking or recipes where a slight coconut flavor is welcome. Its smoke point of around 350°F makes it less ideal for high-heat cooking.

Grapeseed Oil

  • Health Benefits: Grapeseed oil is rich in vitamin E and polyunsaturated fats, which are good for heart health.

  • Flavor Profile: Light and neutral, with minimal taste.

  • Best For: You might enjoy this oil when stir-frying, roasting, and baking. Its smoke point of around 420°F makes it versatile for a variety of cooking methods.

Peanut Oil

  • Health Benefits: Peanut oil contains monounsaturated fats and some antioxidants. It’s popular in Asian cuisine and is generally considered a good option for occasional use.

  • Flavor Profile: Nutty and robust, complementing stir-fries and deep-fried dishes.

  • Best For: Don’t forget to take stock of any potential peanut allergies. Then, you might enjoy this accent when deep-frying and stir-frying, due to its high smoke point of around 450°F.

The Worst Cooking Oils

While no oil is inherently "bad," some are less ideal due to their fat composition, processing methods, or potential health risks. Let’s do a similar rundown of the ones you might want avoid.

Canola Oil

  • Why It’s Questionable: Canola oil is often highly processed and refined, stripping it of many nutrients. It’s also prone to oxidation, which can produce harmful free radicals.

  • Best Alternative: If you like the neutral flavor, consider grapeseed oil or avocado oil as healthier substitutes.

Vegetable Oil

  • Why It’s Questionable: Since it’s a blend of oils (often soybean, corn, or palm), vegetable oil is usually highly refined and lacks nutritional benefits. It’s also high in omega-6 fatty acids, which can contribute to inflammation when consumed in excess.

  • Best Alternative: Consider using avocado oil or sunflower oil, instead.

Palm Oil

  • Why It’s Questionable: While palm oil has a high smoke point and is widely used in processed foods, its environmental impact is concerning. Large-scale palm oil production contributes to deforestation and habitat destruction.

  • Best Alternative: Try to use coconut oil or sustainably sourced palm oil (if you can find it).

Margarine and Partially Hydrogenated Oils

  • Why It’s Questionable: These oils are loaded with trans fats, which are known to increase bad cholesterol (LDL) and decrease good cholesterol (HDL), significantly raising the risk of heart disease.

  • Best Alternative: You might want to use butter or ghee sparingly, or opt for olive oil for a healthier fat source.

Corn Oil

  • Why It’s Questionable: High in omega-6 fatty acids, corn oil can disrupt the balance of omega-3 to omega-6 fats in your diet, potentially leading to inflammation. It also tends to be genetically modified and highly refined.

  • Best Alternative: Replace it with avocado oil or extra virgin olive oil.

Tips for Choosing and Using Cooking Oils

With all that in mind, when in doubt, here are a few basic tips the next time you’re pouring over a plethora of oils in Whole Foods or your favorite grocery store. 

  1. Read Labels: Look for oils labeled “cold-pressed,” “extra virgin,” or “unrefined,” because these variations retain more nutrients.

  2. Store Properly: Keep your oils in a cool, dark place to prevent oxidation. Some oils, like flaxseed oil, are best stored in the fridge.

  3. Experiment with Flavors: Don’t be afraid to try specialty oils like sesame or walnut oil for specific recipes. They can elevate your dishes with unique flavors!

  4. Rotate Oils: Different oils offer different benefits. Rotate them to diversify your nutrient intake and flavor profiles.

Flavor Pairing Cheat Sheet

And, finally, when you’re back home and ready to prepare your feast, here are a few things to keep in mind when it comes to pairing. As our oil inventory grows, so will your pairing options! 

  • Olive Oil: Mediterranean dishes, roasted vegetables, or fresh salads.

  • Avocado Oil: Grilled meats, stir-fries, or homemade mayonnaise.

  • Coconut Oil: Curries, baked goods, or popcorn.

  • Sesame Oil: Asian stir-fries, noodle dishes, or dressings.

  • Walnut Oil: Drizzles on pasta, roasted veggies, or desserts.

Increase Your Flavor Game

Cooking oil is more than just a medium to prevent food from sticking to the pan – it’s a key player when it comes to flavor and nutrition. Whether you’re whipping up a salad, frying an egg, or roasting vegetables, there’s an oil that’s perfect for the job. 

The next time you’re in the grocery aisle, reach for an oil that aligns with your taste buds and your wellness goals. And, when you’re back home, be sure to come back for more recipes and health-related tips for 2025. What do you say we make this the year that we elevate everything we do?

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