One of the first things I tell people when they ask me about paleo and healthy eating is to sort out their fats and oils. It’s really worrying how many people still use canola or vegetable oil as their standard frying fat or how often I see people smoking the crap out of extra-virgin olive oil. Don’t even get me started on margarine!
That’s why this post is long overdue!. I’ve gone through dozens of websites, articles and papers to collate the list and the full breakdown of smoke points and cooking uses of common fats and oils but please let me know if you think something is incorrect or I should add extra information. I want to make this a useful resource for everyone.
Let’s start with the bad guys!
Vegetable & Seed Oils
Together with high-fructose corn syrup and soy meat substitutes, the industrial revolution was responsible for the mass production of highly processed (polyunsaturated) vegetable and seed oils, such as soybean, canola and corn oil.
While naturally occurring, minimally processed fats and oils (such as olive oil and butter) are a healthy source of energy and nutrients, highly processed seed oils contain high (read VERY HIGH) levels of omega-6 fatty acids, which – when consumed in excess – have detrimental health effects.
Problem is – these oils are present in nearly everything we eat nowadays. Grain-fed livestock, where a lot of meat produce comes from, is also high in omega-6. A diet high in omega-6 is associated with an increase in inflammatory diseases such as cardiovascular disease, type 2 diabetes, rheumatoid arthritis, asthma and cancer to mention a few.
In addition to omega-6 fatty acids, most polyunsaturated oils are highly prone to oxidation and rancidity, which turns these so-called ‘heart healthy’ oils to toxic liquids.
And although some of them have a high smoking point, making them seemingly suitable for frying and cooking at high temperatures, their chemical structure is so unstable (again, due to the fatty acid ratio) that they really shouldn’t be cooked with at all.
For these reasons, it’s best to avoid the following fats and oils: corn, cottonseed, soybean, canola, safflower, sunflower, peanut, grape seed, vegetable and margarine, which is made from aforementioned oils.
Best for hot use (from highest to lowest temperature stability): Lard, duck fat, tallow Extra virgin olive oil Ghee, Macadamia oil, Avocado oil
Best for cold use: Macadamia oil, Avocado oil, Sesame oil, Refined and unrefined coconut oil, Hazelnut oil, Almond/walnut oil, Olive oil Flaxseed oil Almond/walnut oil, Butter Butter.
Here is a full breakdown of smoking points and cooking uses of common fats and oils.
The smoke point of a fat or an oil is the temperature at which it gives off smoke and starts to break down and oxidise, losing nutrients and developing toxic properties. Most foods are fried at around 170°C -240°C and it’s always best to choose a fat or oil with a smoking point just above that.
Coconut oil I use is by Niulife, which you can purchase online and in many health food stores in Australia.
References & resources on fats and oils:
Make your own ghee – Nom Nom Paleo
Guide to Fats & Oils – Dianne Sanfilippo from Balanced Bites
The Complete Guide to Fats and Oils – What to Cook With (or not), What to Avoid and Why – Lisa Rose from Real Food Kosher
Omega 6 and 3 in Nuts, Oils, Meat and Fish. Tools to Get It Right – Julianne Taylor on Primal Docs
Type of Cooking Fats and Oils – Smoking Points of Fats and Oils – from What’s Cooking America
Good Fats, Bad Fats: Separating Facts from Fiction – Chris Masterjohn on Weston A. Price.
Checking Your Oil: The Definitive Guide to Cooking with Fat – Caveman Doctor
The Truth About Saturated Fat – Mary Enig
The Oiling of America – Mary Enig and Sally Fallon
What Should my Blood Cholesterol Be? – Dr. Natasha Campbell-McBride
9 Steps to Perfect Health – #1 Don’t Eat Toxins – The Healthy Skeptic
Smart Fuel: Macadamia Oil, and read a well-balance view on Nuts and Omega – 6 Intake -Mark’s Daily Apple
How to Decrease Your Polyunsaturated Fat Intake – Living the Nourished Life
What’s the Truth About Cottonseed Oil? – Agriculture Society
Hemp Oil and Hemp Seeds – Are they Safe? – Food Renegade
Five Fats You Should Be Cooking With But May Not Be -Chris Kresser
Butter Anyone? Defending Fat with Facts – Livin La Vida Low-Carb
Five Fats You MUST Have in Your Kitchen – The Healthy Home Economist
Macadamia Oil – Mark Sisson