• H&R Moderators: streaM Freak

Cooking oils - The good, the bad, and what do you use?

Olive oil (best quality) for Salads and for medium temp frying, sunflower oil for proper frying, and pumpkin seed oil for salads (this one is actually only a real thing here in austria, made from a special oil pumpkin, you don't find it anywhere else than in Austria and Slovenia i think. it's very tasty an healthy, see pic)

oel_tunken.jpg
 
Olive oil (best quality) for Salads and for medium temp frying, sunflower oil for proper frying, and pumpkin seed oil for salads (this one is actually only a real thing here in austria, made from a special oil pumpkin, you don't find it anywhere else than in Austria and Slovenia i think. it's very tasty an healthy, see pic)

Do you happen to know how to tell the difference between the different qualities of olive oil? All the ones at the supermarket say "extra virgin cold pressed" but they have varying prices for the same amount, so surely there's a difference?
 
This from wiki is quite interesting:

Extra-virgin olive oil Comes from virgin oil production only, and is of higher quality: among other things, it contains no more than 0.8% free acidity (see below), and is judged to have a superior taste, having some fruitiness and no defined sensory defects. Extra-virgin olive oil accounts for less than 10% of oil in many producing countries; the percentage is far higher in the Mediterranean countries ( Greece: 80%, Italy: 65%, Spain 30% ).

Virgin olive oil Comes from virgin oil production only, but is of slightly lower quality, with free acidity of up to 1.5%, and is judged to have a good taste.

Refined olive oil is the olive oil obtained from virgin olive oils by refining methods that do not lead to alterations in the initial glyceridic structure. It has a free acidity, expressed as oleic acid, of not more than 0.3 grams per 100 grams ( 0.3% ) and its other characteristics correspond to those fixed for this category in this standard. This is obtained by refining virgin olive oils with a high acidity level and/or organoleptic defects that are eliminated after refining. Note that no solvents have been used to extract the oil, but it has been refined with the use of charcoal and other chemical and physical filters. Oils labeled as Pure olive oil or Olive oil are primarily refined olive oil, with a small addition of virgin-production to give taste.

Cold Pressing is a more traditional way of extracting oil, as opposed to chemical extraction using a solvent (Cheap vegetable oils use chemical extraction, primarily using hexane as a solvent).

Hexane was in the news a few years ago because a Chinese worker in the apple factory died from the solvent which they'd been using to clean screens.

Edit: I re-read your post, were you thinking more towards the flavours, acidity contents and so forth of oil? This seems quite informative http://recipes.howstuffworks.com/how-olive-oil-works2.htm
 
But I would imagine the hexane is effectively removed from the final product. Many drugs, for example, are extracted or synthesized using toxic chemicals. Using an example of hexane being employed as a cleaning agent is misleading.
 
A lot of blogs and sites I've seen, some seem to think canola is the devil? I haven't really seen canola in the UK, but we get rapeseed oil, which is the same thing right?

Yup, canola is the same as culinary rapeseed oil. North Americans don't call it that because of the word 'rape'. :\

Would cooking in water work for a lot of things - For example could you stir fry with water?

Cooking with oil leads to intense direct heat transfer that boils water out of food and has a drying effect. The oil also gets adsorbed on the food and alters the mouthfeel. It's hard to replicate it without oil. You can pan fry things on a dry surface, or bake, but otherwise good luck trying to get a crispy french fry with steam, even superheated steam.

Try it for yourself, compare deep-fried potato, pan-fried or baked potato, and steamed/boiled potato. In my opinion, you can't compare them. Nutritionally speaking, deep fry is pretty horrible for foods compared to steaming (high temperatures destroy vitamins/nutrients, fats dissolve the oil soluble ones), but you can limit this by moderation, using fresh ingredients of high quality, and eating things other than french fries.

They don't chill eggs for example, eggs don't need to be chilled, but towards the end of their shelf life you can chill them to make them last longer - however I imagine most supermarkets would turnover the product fast enough that this isn't too much of a problem.

In my neck of the woods, egg and dairy is always chilled.

The amount of UV that penetrates a transparent PET bottle, or thick glass is not a concern with respect to oil stability. Without oxygen present in the oil (i.e. open storage), it won't spoil... and gas doesn't really diffuse through plastic/glass well either.
 
Yup, canola is the same as culinary rapeseed oil. North Americans don't call it that because of the word 'rape'. :\

Apparently the Canola plant is such an extreme artificial modification of the rape plant that it's more accurate to call it Canola oil.

The section on Canola oil in the book Defy your Doctor and be Healed by Sarah C. Corriher and C. Thomas Corriher (2013).


Canola Oil

Back in the 1960's, the food industry was in search of an oil that could be produced cheaply, but marketed toward health conscious consumers. While olive oil was preferred amongst those who cared about their health, it was never easy or cheap to mass produce. As a result, the food industry began selling rapeseed oil as a supposedly healthy substitute. Serious problems were later discovered with the erucic acid in rapeseed, like the fact that it caused degenerative lesions in the heart muscles. It should not have been surprising to the producers, since rapeseed is so naturally poisonous that insects avoid it. Food companies decided to sell it anyway, even after realizing the serious liability risk that they were placing themselves in.

Starting in 1964, the food industry joined forces with the chemical and nuclear industries to begin work in reducing rapeseed's poisonous erucic acid content, in the hope of producing of a less toxic version of rapeseed oil. It had been banned in the U.S. in 1956. It would take the industry over a decade and enormous amounts of genetic engineering to get rapeseed oil back into the U.S. market. The resultant plant from the genetic modifications was originally called L.E.A.R. (low erucic acid rapeseed) and it is sometimes still called that within the food industry. It has been widely renamed to "canola" for marketing reasons, because no company wanted to market a cooking oil that had been officially banned for causing permanent heart damage, and having "rape" in the product name was considered a liability.

The promoters of canola freely admit that its name was only changed for marketing purposes, which serves only to perpetuate the deception about its true lineage, as if canola were a totally different plant from rapeseed. This Frankenstein plant may be even worse than its parent rapeseed, for canola cooking oil is an E.P.A. registered pesticide. It is far from the natural product of selective breeding that its proponents contend. Canola oil was invented in a biotechnology laboratory in 1976, using radiation bombardment techniques to destroy parts of the plant's DNA. This produced the first canola plant that has ever existed in the world.

This comes from the official Canola Council of Canada:

"Here are some key facts on growing genetically modified (GM) canola in Canada.

"GM or transgenic canola varieties have been modified to be resistant to specific herbicides. They are called herbicide-resistant varieties. The plants are modified, but the oil is not modified. It is identical to canola oil from non-modified or conventional canola.

"Herbicide-resistant GM canola is grown on about 80% of the acres in western Canada. GM canola was first introduced in 1995."

The figures cited in the quotations above are dated. About 90% of the canola is genetically engineered to be herbicide resistant at the time this was written. The above quotation betrays that canola has been through two separate generations of genetic engineering: first to create the low erucic acid rapeseed that was renamed to canola, and then to further genetically modify it again to make it herbicide resistant. No canola in the United States has any labeling to indicate that it is genetically engineered, or any labeling to indicate that it is a variety of rapeseed.

The following quotes come from the research paper, Genetic Control of Fatty Acid Biosynthesis in Rapeseed, which was published in The Journal Of The American Oil Chemists' Society when work on modifying rapeseed began. Here are a couple of snippets from that report, explaining exactly how canola oil (L.E.A.R.) began life:

"Self-pollinated seed harvested from each plant was oven-dried, weighed and crushed with a glass rod in a 50-ml Erlenmeyer flask containing 10 ml solution of methanol, acetyl chloride and benzene in the ratio of 20:1:4. The mixture was refluxed under an air condenser for 1 hr to extract and esterify the seed oil. A known wt of internal standard (dibutyl sebacate dissolved in carbon tetrachloride) was added and 0.2-0.4 ~1 of the sample injected into an F and M model 500 gas chromatograph operated at 208c with a helium flow rate of 75 ml / min and using an 8 ft 3/16 in... At the base of each pod, 10 ~1 aqueous solution of radioactive sodium acetate (0.2 ,c methyl labelled) was injected with a Hamilton micro-syringe. A branch from a rapeseed plant bearing 15 pods was excised below the lowest pod, the pods were similarly injected... "

What was noticeably absent from the procedure was any mention whatsoever of controlled pollination, which the canola marketers have been swearing was at the core of their organic selective breeding process to create all-natural canola. Part of the propaganda used to deceive us about canola oil's safety involves the fact that its manufacturer's laboratory tests have shown it to be a more-or-less healthy cooking oil, until it is actually heated. Then canola undergoes a chemical transformation. Canola is technically a healthy cooking oil -- provided that it is never actually cooked. As long as it remains cold and inside its air-tight bottle or test tube -- it tests to be healthy. However, once heated, canola oil produces high levels of 1,3-Butadiene, benzene, acrolein, formaldehyde, and other related compounds which become infused into the foods being cooked. All traces of omega-3 are gone.

Canola shares soy's hormone-disrupting tendencies. Canola oil is also noted to produce cancer-causing toxic fumes when heated, and generally at much lower temperatures than are required to cause equivalent smoking by other cooking oils. Rapeseed and canola oil fumes are the primary reason for the surprisingly high incidence of Asian lung cancers, despite tobacco smoking being a rarity. Canola fumes have been known to kill pet birds, and many readers will remember that canaries were once used in coal mines to detect the presence of poisonous gases.

Dr. Joseph Mercola was the first person who was brave enough to go against the collective grain by attacking the fraudulent canola industry, and he was right to do it. As reported by Dr. Mercola:

"Canola oil was developed from the rape seed, a member of the mustard family. Rape seed is unsuited to human consumption because it contains a very-long-chain fatty acid called erucic acid, which under some circumstances is associated with fibrotic heart lesions. It has a high sulfur content and goes rancid easily. Baked goods made with canola oil develop mold very quickly. During the deodorizing process, the omega-3 fatty acids of processed canola oil are transformed into the dangerous trans fatty acids, similar to those in margarine, and possibly more dangerous. A recent study indicates that 'heart healthy' canola oil actually creates a deficiency of vitamin E, a vitamin required for a healthy cardiovascular system. Other studies indicate that even low-erucic-acid canola oil causes heart lesions, particularly when the diet is low in saturated fat."

Our recommendations include using extra virgin olive oil that is cold pressed for most recipes and using peanut oil for high heat recipes, such as frying. Sunflower oil (not to be confused with safflower) is an acceptable alternative to olive oil. For high-heat cooking and frying, peanut oil is absolutely the safest choice. It is the rapid break down of other oils that make fried foods unhealthy. Butter is good for use with practically every recipe, and natural (preferably organic) butter should be a core component of every diet. Always be watchful of the "smoke point" temperature of an oil, because smoking is an indication of dangerous break-down.
NSFW:
 
There is a lot of fearmongering about canola out there. Snopes has a good review.

Snopes said:
In 1974, rapeseed varieties with a low erucic content were introduced. Scientists had found a way to replace almost all of rapeseed's erucic acid with oleic acid, a type of monounsaturated fatty acid. (This change was accomplished through the cross-breeding of plants, not by the techniques commonly referred to as "genetic engineering.") By 1978, all Canadian rapeseed produced for food use contained less than 2% erucic acid. The Canadian seed oil industry rechristened the product "canola oil" (Canadian oil) in 1978 in an attempt to distance the product from negative associations with the word "rape." Canola was introduced to American consumers in 1986. By 1990, erucic acid levels in canola oil ranged from 0.5% to 1.0%, in compliance with U.S. Food and Drug Administration (FDA) standards.

This light, tasteless oil's popularity is due to the structure of its fats. It is lower in saturated fat (about 6%) than any other oil. Compare this to the high saturated fat content of peanut oil (about 18%) and palm oil (at an incredibly high 79%). It also contains more cholesterol-balancing monounsaturated fat than any oil except olive oil and has the distinction of containing Omega-3 fatty acids, a polyunsaturated fat reputed to not only lower both cholesterol and triglycerides, but also to contribute to brain growth and development.




Starting in 1964, the food industry joined forces with the chemical and nuclear industries to begin work in reducing rapeseed's poisonous erucic acid content, in the hope of producing of a less toxic version of rapeseed oil. It had been banned in the U.S. in 1956. It would take the industry over a decade and enormous amounts of genetic engineering to get rapeseed oil back into the U.S. market. The resultant plant from the genetic modifications was originally called L.E.A.R. (low erucic acid rapeseed) and it is sometimes still called that within the food industry. It has been widely renamed to "canola" for marketing reasons, because no company wanted to market a cooking oil that had been officially banned for causing permanent heart damage, and having "rape" in the product name was considered a liability.

The promoters of canola freely admit that its name was only changed for marketing purposes, which serves only to perpetuate the deception about its true lineage, as if canola were a totally different plant from rapeseed. This Frankenstein plant may be even worse than its parent rapeseed, for canola cooking oil is an E.P.A. registered pesticide. It is far from the natural product of selective breeding that its proponents contend. Canola oil was invented in a biotechnology laboratory in 1976, using radiation bombardment techniques to destroy parts of the plant's DNA. This produced the first canola plant that has ever existed in the world.

Most of this is pure crap. Canola was "genetically engineered" like any other food crop was - through selective breeding. It was not produced by radiation bombardment nor was the nuclear industry involved.

Also, cellulose from corn cobs is an EPA registered pesticide. Soapy water is an EPA registered pesticide. Think about that for a bit. In fact, olive oil is probably one too, if it kills mites.

"Herbicide-resistant GM canola is grown on about 80% of the acres in western Canada. GM canola was first introduced in 1995."

So it's only been genetically modified since 1995, or has it been genetically modified since its invention?

However, once heated, canola oil produces high levels of 1,3-Butadiene, benzene, acrolein, formaldehyde, and other related compounds which become infused into the foods being cooked. All traces of omega-3 are gone.

Omega-3 is not that unstable. Significant amounts persist even during deep frying. And this criticism would still apply to every other oil - heating peanut oil creates the very same breakdown products.

Canola shares soy's hormone-disrupting tendencies. Canola oil is also noted to produce cancer-causing toxic fumes when heated, and generally at much lower temperatures than are required to cause equivalent smoking by other cooking oils. Rapeseed and canola oil fumes are the primary reason for the surprisingly high incidence of Asian lung cancers, despite tobacco smoking being a rarity.

Source: I pulled this out of my ass.
 
Canola oil was invented in a biotechnology laboratory in 1976, using radiation bombardment techniques to destroy parts of the plant's DNA. This produced the first canola plant that has ever existed in the world.

I don't see how this is worse than selective breeding. . .the only difference is that you would have an increased incidence of mutation, leading to greater variation in each generation. That people are afraid of radiation is a red herring.

No canola in the United States has any labeling to indicate that it is genetically engineered, or any labeling to indicate that it is a variety of rapeseed.

This is true of GMOs in the US in general.

"Self-pollinated seed harvested from each plant was oven-dried, weighed and crushed with a glass rod in a 50-ml Erlenmeyer flask containing 10 ml solution of methanol, acetyl chloride and benzene in the ratio of 20:1:4. The mixture was refluxed under an air condenser for 1 hr to extract and esterify the seed oil. A known wt of internal standard (dibutyl sebacate dissolved in carbon tetrachloride) was added and 0.2-0.4 ~1 of the sample injected into an F and M model 500 gas chromatograph operated at 208c with a helium flow rate of 75 ml / min and using an 8 ft 3/16 in... At the base of each pod, 10 ~1 aqueous solution of radioactive sodium acetate (0.2 ,c methyl labelled) was injected with a Hamilton micro-syringe. A branch from a rapeseed plant bearing 15 pods was excised below the lowest pod, the pods were similarly injected... "

What was noticeably absent from the procedure was any mention whatsoever of controlled pollination, which the canola marketers have been swearing was at the core of their organic selective breeding process to create all-natural canola.

This describes an extraction procedure for analysis to determine which plants exhibit the desired trait, to facilitate selective breeding.

Canola shares soy's hormone-disrupting tendencies. Canola oil is also noted to produce cancer-causing toxic fumes when heated, and generally at much lower temperatures than are required to cause equivalent smoking by other cooking oils. Rapeseed and canola oil fumes are the primary reason for the surprisingly high incidence of Asian lung cancers, despite tobacco smoking being a rarity. Canola fumes have been known to kill pet birds, and many readers will remember that canaries were once used in coal mines to detect the presence of poisonous gases.

This section could use some references. It is thought that isoflavones are what function as phytoestrogens in soy. One would not expect an oil extraction to concentrate such substances. I'd also like to know what compounds result from heating canola oil at which temperatures, in what quantities. Also, the rate of smoking is higher in China, Japan, and Korea than in the US, but incidence of lung cancer does not appear higher.

Canola oil was developed from the rape seed, a member of the mustard family. Rape seed is unsuited to human consumption because it contains a very-long-chain fatty acid called erucic acid, which under some circumstances is associated with fibrotic heart lesions. It has a high sulfur content and goes rancid easily.

This criticism applies to rapeseed oil in general, not the Canola cultivar.
...
This goes to show that one needs read secondary sources with a critical eye.

ebola
 
Wow, talk about misinformation, thanks for pointing that out about the extraction procedure. Are you positive that that description is just describing the procedure to analyze the properties of different plants?

I still think there are some valid issues being pointed out. For example this quote from Joseph Mercola:

During the deodorizing process, the omega-3 fatty acids of processed canola oil are transformed into the dangerous trans fatty acids, similar to those in margarine, and possibly more dangerous.


I would imagine that raw canola oil is nowhere near as neutral-smelling/tasting and commercially appealing as the final product. It probably does in fact undergo the deodorizing being spoken of.

Mercola also says that hydrogenated oils are heated to such a high degree that they turn gray and then they're colored and have artificial flavors added to them.* Do you think that's true? Such things don't need a source because his source might be someone in the industry spoke to him or he toured an oil-producing factory (but even stuff like that should be indicated).

*Why You Should Avoid Margarine, Shortening and Spreads -> http://articles.mercola.com/sites/articles/archive/2010/12/07/why-is-butter-better.aspx
 
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During the deodorizing process, the omega-3 fatty acids of processed canola oil are transformed into the dangerous trans fatty acids

You're not going to see spontaneous transisomerization in the heating process that the oil undergoes during processing. This would require much higher levels of heat and some sort of catalyst (eg, palladium).


Mercola also says that hydrogenated oils are heated to such a high degree that they turn gray and then they're colored and have artificial flavors added to them.

Oil hydrogenation does indeed involve high heat, but I don't know whether it causes the oil to change color or what the significance of that would be. Regardless, one should simply avoid partially hydrogenated oils, as trans-fats are unequivocally bad for you (in a way that's not controversial, as with other health facts). Luckily, trans-fats have received such poor press that most manufacturers of processed foods have found alternatives voluntarily.

ebola
 
The only stuff I cook with is organic coconut oil, some say it makes meat taste slightly sweet, but the one I use doesn't have that effect, or at least not that I can tell.
 
Hydrogenated fats, if they're pure enough, are white like paraffin. Most saturated fats are.

In this day and age, hydrogenation procedures have been developed so that there is a suprisingly low trans fat amount in most margarines, making meats one of the bigger sources rather than toast-spreads.
 
During the deodorizing process, the omega-3 fatty acids of processed canola oil are transformed into the dangerous trans fatty acids, similar to those in margarine, and possibly more dangerous.

You're not going to see spontaneous transisomerization in the heating process that the oil undergoes during processing. This would require much higher levels of heat and some sort of catalyst (eg, palladium).


The oil is removed by a combination of high temperature mechanical pressing and solvent extraction. Traces of the solvent (usually hexane) remain in the oil, even after considerable refining. Like all modern vegetable oils, canola oil goes through the process of caustic refining, bleaching and degumming--all of which involve high temperatures or chemicals of questionable safety. And because canola oil is high in omega-3 fatty acids, which easily become rancid and foul-smelling when subjected to oxygen and high temperatures, it must be deodorized. The standard deodorization process removes a large portion of the omega-3 fatty acids by turning them into trans fatty acids. Although the Canadian government lists the trans content of canola at a minimal 0.2 percent, research at the University of Florida at Gainesville, found trans levels as high as 4.6 percent in commercial liquid oil.24

24. S O'Keefe and others. Levels of Trans Geometrical Isomers of Essential Fatty Acids in Some Unhydrogenated US Vegetable Oils. Journal of Food Lipids 1994;1:165-176.
http://onlinelibrary.wiley.com/doi/10.1111/j.1745-4522.1994.tb00244.x/abstract

Source: Fallon, Sally, and Mary Enig, "The Great Con-nola." The Weston A. Price Foundation. 28 July 2002. http://www.westonaprice.org/know-your-fats/the-great-con-ola
 
Honestly, to me all most of those oils you people are talking about are just like research chemicals.

They are super new on a larger time frame, and I don't trust them.

I only use olive oil, and on low heat so it won't damage the oil. We have been using it for a very, very long time. Well, sometimes I'll use butter or pig fat, but I try not to, since I believe it's less healthy.
 
I'm stoked y'all know and care a thing or two about one of your most important and regularly taken in food groups. I myself have been a carer for years. Here's what little I know in a nutshell:

It's not simply a matter of 'monosaturated vs. polyunsaturated,' or 'omega-6 vs. omega-3,' because each has their own subdividible classifcations which are represented differently acorss the plant kingdom, and every subtype is significantly different. Thus an oil from one plant may have similar O-6/O-7 profile as another but far less edible. In general edibility is the one thing I try to understand about feasting on oils - if it is pro-inflammatory and hardly regarded as food to the rest of the world then it is pretty obvious to me that it is not considered food.

The only plant-based oils that I've read are the ones we 'should' eat are olive oil, coconut oil, and palm oil. The rest all have bad profiles that reside with the more toxic sub-categories of Omega-6 fatty acids apparently. Coconut oil is considered the most readily digested oil and it actually has the least calories per gram out of all known edible oils (6.8 kcal/gram, as opposed to the standard 9 kcal/gram like the Nutriotion Facts claim). This is because of its unique composition of mostly lauric acid, which is also present in similar proportions in palm fruit oil. By the laws of physics and chemistry any unsaturated oil (that is, liquid at room temperature in layman's terms) is going to pack more calories in it, as liquid displaces less volume than solids when it concerns oils. Saturated fats are solid; they have kinks in their chains and take up more space per weight. Their chains are stabler and the ones found in animals and many widely understood plants such as coconut have been a food for humans for thousands of years.

I've read that pretty much any vegetable/plant oil other than these three are going to promote and intensify inflammation throughout the body, and that animal fats are technically highly digestible and are also relatively much more stable (read: non-rancid) than most oils out there. Off the top of my head here's the best recommendation that I can provide, Sally Fallon's Nourishing Traditions cookbook and guide. It's got a lot of interesting facts that I never would have considered.
 
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