Flaxseed oil and olive oil are both plant oils, but they are usually used in different ways. Choosing between them depends on flavour, cooking method, storage and the type of fat you want in your overall diet.
Flavour and texture
Flaxseed oil usually has a mild, nutty or slightly grassy taste. Extra-virgin olive oil can range from mild and buttery to peppery and robust. For cold dishes, the flavour matters: try a small amount first in a dressing, dip or finished dish.
Fat profile
Flaxseed oil is known for providing alpha-linolenic acid (ALA), an omega-3 fatty acid. Olive oil is known for being high in monounsaturated fat, especially oleic acid. Neither oil needs to replace the other completely; they can serve different roles in a varied eating pattern.
Cooking uses
Olive oil is commonly used for sauteing, roasting and everyday cooking, depending on the product and cooking temperature. Food-grade flaxseed oil is generally better used without high heat, such as in salad dressings, cold sauces, smoothies or as a finishing oil. Always follow the storage and use directions on the product label.
Storage
Flaxseed oil is sensitive to light, heat and oxygen, so many brands recommend refrigeration after opening. Olive oil should also be kept tightly closed and away from heat and direct light. Check the label because packaging and processing methods vary.
Which one should you choose?
Choose olive oil when you want a versatile everyday cooking oil with a recognisable savoury flavour. Choose flaxseed oil when you want a cold-use oil with a mild nutty taste and plant-based ALA. The best choice depends on the dish, your preferences and the rest of your diet.
This article provides general food information, not medical advice. For a personal nutrition plan or questions about medication, pregnancy or a medical condition, consult a qualified health professional.
Frequently Asked Questions
Can I use flaxseed oil instead of olive oil for frying?
Flaxseed oil is usually better suited to cold uses. Follow the product label for cooking guidance.
Do flaxseed oil and olive oil taste the same?
No. Flaxseed oil is usually mild and nutty, while olive oil can be fruity, peppery or savoury.
Should flaxseed oil be refrigerated?
Many brands recommend refrigeration after opening. Follow the label on your bottle.
Alex Wang
He researches nutritional information and creates educational content to help consumers better understand healthy fats, omega-3s, and food choices.