Inflammation and 8 Other Side Effects of Canola Cooking Oil
While canola oil has been marketed as a health-food oil, low in saturated fats and a source of omega-3 fatty acids, it is very far from that. Canola oil is not only genetically modified, but it is highly processed and refined, both of which contribute to major health problems in the body. Canola oil has practically taken over as the food processing industry’s oil of choice. Whether it’s mayonnaise, chips, salad dressings and other snack foods, canola oil is usually the first, second or third ingredient on the list. Canola oil is extremely inexpensive to grow and harvest. 90 percent of the Canadian canola oil crop is a Monsanto genetically engineered crop(1) because insects won’t go near canola oil, it is incredibly easy to grow.Unfortunately, the health dangers of canola oil are far beyond what we’ve been led to believe.
What is Canola Oil?
Canola oil comes from a descendant of the rapeseed plant, a member of the Brassica genus, along with some of our favourite vegetables like kale, broccoli, cauliflower and cabbage. Rapeseed oil was put on the market for human consumption in the 1950s, but not many people wanted to consume it due to its strong flavour and off-putting colour.
Scientists at the time began to discover that erucic acid, one of the major fatty acid components of the oil (over 50%), was damaging to heart tissue. Meanwhile, olive oil started being marketed as the next big thing in health. So what did marketers do for rapeseed oil? Give it a makeover of course! After some selective breeding and careful marketing, rapeseed oil was now low in erucic acid, high in oleic acid (just like heart-healthy olive oil), high in omega-3 fats and also neutral tasting. The name rapeseed was replaced with canola (the term can from Canada, and ola for oil) (2).
Inflammation and 8 Other Side Effects of Canola Cooking Oil
Canola oil isn’t the healthy oil you’ve been led to believe. There are so many dangers of canola oil, that anyone in their right mind would stay away from it. Here are just a few reasons why canola oil should never be in your home again.
Unfortunately, in America and other industrialized nations, excess consumption of omega-6 fatty acids has caused a deficiency of omega-3. While the typical omega-6 to omega-3 fatty acid ratio should be 2:1, it is actually more like 20:1. These discrepancies can be associated with inflammation and other chronic diseases all throughout the body.
In fact, symptoms of severe omega-3 deficiency include:
Canola Oil Nutrition Facts: Autoimmune Diseases
Those suffering the most from omega-3 deficiencies tend to be those with poor diets, which contain abnormal amounts of processed foods, hydrogenated oils and large amounts of canola oil. If that’s not bad enough, here are a few more side effects of excessive canola cooking oil consumption:
- Elevated risks of cancer associated with the hydrogenation process
- Growth retardation
- Irregularities in blood platelets
- Damage to free radicals
- Liver and kidney breakdown
1. How a Hydrogenated Oil Leads to Inflammation
All oils, unless they’re “cold-pressed” or “extra-virgin” are refined. This process includes caustic refining, bleaching, and degumming – all which involve high temperatures or chemicals that are damaging to the human body. Last but not least comes the deodorization process. Because canola oil is high in omega-3 fatty acids, it becomes easily rancid and foul-smelling when subjected to oxygen and high temperatures. The standard deodorization process removes a large portion of the omega-3 fatty acids by turning them into trans-fatty acids (3).
If you’re consuming any vegetable oils that are oxidized from heat and light in processing, you are also exposing your body tissues to oxidized or rancid products. This contributes to degenerative diseases and chronic inflammation.
2. Genetically Modified Product
Almost all canola oil is produced from genetically modified crops. More than 90% of all canola oil is produced from genetically engineered crops. While genetic modification was successful at lowering the erucic acid content, it also increased the amount of oleic acid.
Oleic acid has been linked to a number of health concerns such as:
– Retarded growth (banned in infant formulas)
– Abnormalities in blood platelets
– Damage from free radicals
– Increased risk of developing certain cancer types
Genetically engineered foods also pose some very serious health concerns like allergic reactions, immuno-suppression, toxicity, and loss of nutrition through the foods we eat (4).
3. Increased Risk of Developing Cancer
Canola oil is extremely unstable under heat, light and pressure, which causes oxidation and releases free radicals inside the body. When canola oil is heated (aka. when we cook with it), it produces high levels of butadiene, benzene, acrolein, formaldehyde and other nasty compounds. These chemical compounds, combined with increased free radicals create the perfect environment for cancer growth.
Researchers have found that cancer cells feed on the oleic acid in canola oil. The acid causes the cancer cells to become stronger and maintain malignancy (5). Additional research has also shown that oleic acid promotes tumor progressions (6).
With the amount of free radicals released in canola oil after cooking, it’s no wonder this oil is a trigger for cancer growth. Free radicals are highly reactive chemicals that play a major role in cancerous cell mutation (7).
4. Contributes To Heart Disease
While genetic modification has lowered erucic acid levels in canola oil, it is still a major source of the acid. Erucic acid is a fatty acid that has been associated with heart damage, specifically Keshan disease, a disease that creates fibrotic lesions of the heart. Studies have shown that in areas where people are prone to Keshan, erucic acid levels are higher, and selenium levels are lower (8).
Partially hydrogenated oils like canola are also known for causing high levels of inflammation in the body, as well as calcification of the arteries. Both inflammation and calcification are major risk factors for coronary heart disease (9).
5. Interferes with Healthy Brain Function
A new study out of the Lewis Katz School of Medicine at Temple University and published in the journal Scientific Reports has linked canola oil with a decrease in memory and learning indicative of Alzheimer’s disease – the most common form of dementia (10). The study found that the brains of canola-oil treated mice had higher amounts of amyloid plaques as well as diminished contact between brain neurons.
Canola oil, being an inflammatory food, contributes to poor brain function. Chronic inflammation, as you might already know, is detrimental to the body. It attacks healthy cells, blood vessels and tissues instead of protecting them. It can shut down energy production in brain cells and slow down the firing of neurons, contributing to ADHD, anxiety, brain fog, depression, memory loss and Alzheimer’s (11).
6. Hypertension and Strokes
Studies have found that rapeseed oil and some other vegetable oils shortens the life span of stroke-prone and hypertensive animal subjects. One study discovered that rats bred to have high blood pressure and proneness to stroke died sooner when fed canola oil as the sole source of fat. On the flip side, rats fed the non-canola oil-based diets lived longer (12).
Another study published in Toxicology Letters looked at the effects of canola oil on blood coagulation time, or how long it took blood to clot in stroke-prone animal subjects. The study found that there was a “canola oil-induced shortening of blood coagulation time and increased fragility in [red blood cell membranes],” which may trigger strokes in animal subjects who are stroke-prone (13).
7. Kidney and Liver Problems
Being a genetically modified food product, canola oil takes a toll on our liver and kidneys.
A 2011 review of 19 different studies that involved mammals being fed genetically modified soy and corn for a period of 90 days, found that GMO foods can disrupt kidney and liver function. The review, published in Environmental Sciences Europe, stated that in the trials mentioned, kidney function was reduced by 43.5%, while liver function was reduced by 30.8%.
If you want your detox organs to work properly, avoid canola oil, and other GM products.
8. May Hamper Normal Growth in Children
Erucic acid in canola oil was the main reason canola oil was banned from use in infant formula. The erucic acid in canola oil is harmful to infants, due to an inability to properly break it down. While the FDA previously made canola oil illegal for use in baby formula, that isn’t the case anymore. As of a few years ago, canola oil made it to the generally recognized as safe list (14), meaning that infant formula companies can use all the canola oil they want in their formula.
Best Oils to Substitute for Canola Oil
So which oils can you use? It depends on what you’re using it for!
Coconut oil is best when it is cold-pressed and virgin. Try your best to avoid refined coconut oil. Coconut oil has a high heat threshold, meaning it doesn’t turn into trans-fatty acids when heated. Coconut oil contains medium-chain fatty acids, too, which support a healthy nervous system, and also encourage fat loss. Plant-based and delicious, coconut oil has become more and more popular in recent years. Studies point to its many beneficial properties which include boosting the immune system, decreasing inflammation, fighting heart disease, and more.
2. Olive Oil
Part of the Mediterranean diet, olive oil is praised for its ability to improve the health of our heart. Same as coconut oil, always look for extra-virgin or cold-pressed variant. Great for homemade salad dressings, or drizzling on cooked vegetables, olive oil is something you should definitely have in your kitchen. Some fake olive oils are mixed with cheaper, GMO vegetable oils, so always make sure it is GMO-free and organic. Its not advised to COOK with olive oil. Leave your olive oil cold and unheated.
Avocado oil is a great alternative with a mild ﬂavor. It has a higher smoke point that olive oil and preserves its nutrients at higher temperatures. Unlike extra virgin olive oil and coconut oil it blends well into mayo and sauces without much taste. Avocado oil has a high smoke point like coconut oil, so it can safely be cooked with at high temperatures. Alternatively, you can also use this oil in its raw form on salads and the like. Avocado is also unique because it contains more potassium than a banana and more protein and fats than any other fruit. Nutritionally it resembles olive oil.
What about Organic Canola Oil?
Nearly 90% of this product that we find in the market is genetically modified and is prepared by using excessive heat. Organically produced edibles are cold-pressed and keep the nutrients of that particular product intact; thus are undoubtedly a healthier and better choice. Its organic form does not contain any harmful trans-fats and oxidized substances unlike the industrially processed oil. Doing a cost comparison it is more beneficial for your wallet and your body to reach for an alternative oil mentioned above.