Why you should never eat refined oils

When it comes to eating healthy, it starts with what you are cooking WITH.  


With the endless choices on the store shelves it’s hard to know which to choose.  Butter vs. margarine, extra virgin olive oils, refined oils like vegetable and canola.

There is evidence pointing in the direction that it isn’t animal fats causing our epidemic levels of heart disease, but vegetable oils.  Research is showing that butter consumption at the turn of the century was about 18 lbs per person per year and the use of vegetable oils was non existent.  Cancer and heart disease were rare.  Today butter consumption is just above 4 lbs per person per year while the use of vegetable oils and refined oils has soared.

What are refined oils and which ones should you avoid? 

Definition:  An oil has been refined by using chemicals that are harmful to us.  In short it means to ‘purify’.  But the meaning of purify has many definitions.  It may mean the oil was treated with acid, or purified with an alkali, or bleached.  It can also be neutralized, filtered or deodorized.  All of which require chemicals like Hexane

Click here for a look into HOW oil gets refined.

In the process of making and refining these types of oils, it leads to PUFas (rancid polyunsaturated fatty acids) which DO NOT hold up well to high heats.  In the process of being extracted from the seed these oils oxidize and turn into trans fats.  The smell is so rancid that a cleaning process has to take place using bleach to deodorize it.

  • Canola oil
  • Vegetable oil
  • Soybean
  • Safflower
  • Corn oils
  • Margarine (or any other ‘buttery’ spread)

But most of all AVOID Hydrogenated oils (Crisco and margarine) ~  This is one of the most dangerous products on the market today!  It has actually been BANNED in 2 European countries, but not ours.

Hydrogenated oil is made by forcing hydrogen gas into oil as high pressure.  The more solid the oil is the more hydrogenated, such as margarine and Crisco or lard.   When hydrogenated oils are made the healthy fats are converted into a new type of fat, known as trans fat.  This is the one subject that you will find an overwhelming agreement from Doctors, scholars, and scientists alike.  Trans fats should be avoided while healthy fats (found in olive oil, nuts and avocados) should be eaten.

Trans fats are so bad for you, the FDA estimated approximately 95% of prepared cookies, 100% of crackers and 80% of frozen breakfast products contained trans fats [Govt Publishing Office]  Now that trans fats have to be labeled on products, most companies have removed them from their products.  Sneaky, huh?

The problem now isn’t our own kitchens, but what if we dine out?  How do we know what restaurants are using?  Well California’s governor recently signed legislation to phase out trans fats from restaurants and baked goods in bakeries [Natl Conference of State Legislatures].  (Too bad I don’t live in CA) and New York city became the largest city in the nation to demand restaurants, cafeterias and schools go trans free.

The best advice I can give is to ASK.  I ask everytime we go out now if the dressing coming with the salad is homemade or store bought.  I ask what types of oils they use when they cook.  I ask where they get their vegetables.   Don’t turn a deaf ear.  Most restaurants will put the bottom line (their profits) over your health.  I hate to say that, but it’s true.

So which oils are safe then?


1.  EVOO ~ although Extra virgin olive oil contains a high amount of saturated fat (about 12%) it is one of the few unrefined oils.  This means the antioxidants in the original fruit are retained because the oil is extracted by machine only.   Olive oil is usually good 3-12 months after it has been bottled.  After 2 years you can expect the fruity flavors to begin disappearing.  It is best to buy your oil from a local store that specializes in oils.  Purchase them in smaller quantities so they are not sitting in your pantry for months.  And NEVER store them over the stove.  Keep it sealed and out of light.

2.  Olive oil ~ this can be tricky because it is also blended using refined, virgin and extra virgin olive oils.   Be careful and read labels

3.  Organic Butter ~butter (like eggs and coconut oil) have been given a bad rap.  These are the same marketers who said aspartame and margarine were healthy choices!  But butter is a good safe WHOLE FOOD choice.  The best choice would be butter from raw milk grass fed cows and the second choice, which is more accessible to most of us, is organic, which is from milk of grass fed cows with NO rBGH injected into them.

4.  Coconut oil ~ coconut oil is the least fattening of all oils.  It has gotten a bad rap back in the 1970s, but the misinformation out there is outdated and coconut oil is one of the better oils for you.  For more detailed information see my post Coconut Oil ~ What you didn’t know.  I am still experimenting with this myself.


The bottom line is to avoid any refined oils – period.  They are cheap.  They are procesed and they are downright dangerous to your health.  Choose healthy olive oils.  Learn about them.  Find a store that specializes just in oils.  There are so many varieties and flavors.  Cooking with them vs store bought EVOO has opened up a whole new world for me.  They are an investment.  Start slowly with the most common of oils and gradually experiment with other flavors.  The flavors that will come from your food using these quality oils will blow you away!


That 50 years ago paint and varnishes were made of soy, safflower and linseed oils?  Then chemists learned how to make paint from petroleum, which was cheaper.  As a result, the seed oil industry had loads of crop that were hard to sell.  They eventually were given to farmers to make their pigs fatter with less food!  The crops that had gone from the paint industry ended up as food on a farm for animals which in turn ends up on your plate as well.


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  1. Tanya Curry says:

    There is no mention of peanut oil. Our family likes to deep fry occasionally and we try and use peanut oil. What is the lesser of the evils?

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