SATURATED FATS, GOOD; TRANS-FATS, BAD

from Dr. Mercola . . . 

 

Trans Fats Are Being Replaced with Equally Worrisome Oil Products

The latest issue of Wise Traditions, the Weston Price journal, has a great article that is an excerpt from her book, in which she discusses this topic. Most of you reading this are now well aware of the dangers of trans fats, and that the FDA is in the process of banning them completely. That's great news, but the question is, what is trans fat being replaced with? The answer is that the oils they're currently using in lieu of trans fats create toxic oxidation products, which in fact may be more toxic than trans fat.

"I stumbled on this topic because a vice president of Loders Croklaan, a big fats and oils producer, said to me, 'I just heard this terrifying talk by a man in a company who does all the cleaning for fast food restaurants.'... He said they have been having problems since restaurants started getting rid of trans fats in their fryers around 2007... The new oils were building up gunk in the drains and on the walls.

This kind of gunk would harden, and workers would scrape for days and not be able to get it off. The conventional cleaners didn't work anymore. It's turning out to be these highly volatile airborne chemicals. When the restaurants' uniforms would be cleaned, the chemicals were so volatile that they would have problems of piles of uniforms spontaneously combusting in the back of trucks. And then they would go to the dryers. The heat of the dryers, even after the restaurant uniforms were cleaned, would cause fires." [Emphasis mine]

The cleaning company ended up producing a more potent chemical cleaner to scrub off the polymers off the walls and uniforms. Unfortunately, the nutrition community is not studying these volatile vegetable oils. Others, primarily in the molecular biology and genetics fields are, but the different fields are not communicating with each other.

Even Low Levels of Aldehydes Cause Massive Inflammation

One group in Taiwan is studying this issue because women have much higher rates of lung cancer than men. They think it may be related to the fact that women, particularly in Asian countries, stir-fry in unventilated spaces using vegetable oils. In Norway, there's another research group trying to assess the effects on worker health in restaurants.

"[These volatile compounds] are very hard to study because they are very ephemeral, literally changing from one second to the next...They’re very unstable. They’re hard to isolate,” Nina explains. “One thing they did was simply to show that these products exist.  There’s a whole category called aldehydes, which are particularly worrisome.

A group doing research on animals have found that at fairly low levels of exposure, these aldehydes in animals caused tremendous inflammation, which is related to heart disease. They oxidized LDL cholesterol, which is thought to be the LDL cholesterol that becomes dangerous. There's a link to heart disease. There's also some evidence that links these aldehydes in particular to Alzheimer's. They seem to have a very severe effect on the body."

One researcher has found that aldehydes cause toxic shock in animals through gastric damage. We now know a lot more about the role your gut plays in your health, and the idea that aldehydes from heated vegetable oils can damage your gastric system is frighteningly consistent with the rise we see in immune problems and gastrointestinal-related diseases.

"When the FDA got rid of trans fats... restaurants began to use these regular liquid oils instead... they were the cheapest possible option to use… The FDA really did not consider any of this literature about these oxidation products. When you implement a law, you're supposed to look at the risks. What will happen if you implement a new regulation? In this case, the FDA did not," Nina says.

In hearing this, it appears as though cooking with vegetable oil could be a "new" occupational hazard (having occurred within the last 10 years or so) for restaurant workers. If vegetable oils volatize and gum up into polymers that are nearly impossible to clean, and that are damaging fryers, equipment, and causing uniforms to spontaneously combust, what is it doing to the workers' lungs? Larger fast food chains are aware of this issue, and have implemented a number of fixes to address it. But smaller restaurants may be unaware of this problem, thereby placing workers at potential risk. The same applies if you're regularly cooking with vegetable oils in your home.

Saturated Fats Are Stable, and Therefore Ideal for Cooking

Tallow is a hard fat that comes from cows. Lard is a hard fat that comes from pigs. They're both animal fats, and used to be the main fats used in cooking. One of their benefits is that, since they're saturated fats, they do not oxidize when heated. And saturated fats do not have double bonds that can react with oxygen; therefore they cannot form dangerous aldehydes or other toxic oxidation products.

Sheep tallow soap.

 "They're solids at room temperature. That's why they make great cooking fats and have always made great cooking fats. But we don't think about that. This whole chain of events has happened because we demonized saturated fats," Nina notes.

Fortunately, we're now seeing cracks in the prevailing dogma about saturated fats. In March of this year, a groundbreaking meta-analysis reviewed the clinical trial evidence and the epidemiological evidence, and came to the conclusion that saturated fats really cannot be said to cause heart disease. Another meta-analysis three years earlier came to the same conclusion.

Saturated Fat—It Does a Body Good...

The benefits of saturated fat are many. Some appear to be uniquely traceable to saturated fat. For example, you need saturated fats for brain and immune system health. Another argument is that animal foods in general, including meat cheese, butter, dairy, and eggs, contain high amounts of vitamins. Vitamins A, D, E, and K are fat-soluble, and you have to have the fat that comes naturally in animal foods along with the vitamins in order to absorb those vitamins.

"If you're drinking skim milk, you don't have the fat you need to absorb the vitamins in milk. Without absorbing the vitamins, you can't absorb the minerals. These are uniquely nutrient-dense foods. Vitamin B6 and B12, you can't get in plant foods. They're really nutrient-dense foods that come packaged in the fat that you need to absorb them, along with protein. They're kind of a perfect package of nutrient-dense food," Nina says.

Nina also points out that many clinical trials over the past decade have clearly showed that a diet higher in fat and restricted in carbohydrate results in health improvements such as weight loss and a reduction in risk factors for diabetes, and heart disease. A high-fat diet typically means eating animal foods. Of course, there are very healthy saturated plant fats as well—coconut oil and palm oil, specifically. (Avocado, another healthy fat, is unsaturated.)

"[Coconut and palm oil] have been used for millennia in Asian cultures. They are making a big comeback in part because vegans who don't want to eat animal products have found that they still need a fat for cooking that doesn't oxidize when it's heated... Coconut oil fills that function. In the food industry, they've started to bring back palm oil, which has a lot of saturated fat in it and is a good way to make food that lasts long on a shelf, because again, saturated fats are more stable and long-lasting."

Healthy Eating Guidelines for the 21st Century

So, what's the general 21st century revised rule for healthy living and eating? One of the most important points is that you do not need to avoid saturated fats. Saturated fats were unfairly condemned in the 1950s based on very primitive evidence that has since been re-analyzed. The evidence now clearly shows that saturated fats do not cause heart disease. Moreover, your body needs saturated fats for proper function of your:

Cell Membranes	Heart	Bones to absorb calcium
Liver	Lungs	Hormones
Immune system	Satiety to reduce hunger	Genetic regulation

 "Another key piece of information is that a high-fat, carbohydrate-restricted diet looks healthier for losing weight, and making your heart disease biomarkers and diabetes biomarkers look better. There's a real range in how much carbohydrates people will tolerate," Nina says. 

Many people need to increase the healthful fat in their diet to 50-85 percent of daily calories. This includes not only saturated fat but also monounsaturated fats (from avocados and nuts) and omega-3 fats. When it comes to cooking fats, few compare to tallow and lard in terms of health benefits and safety. These are the cooking fats that were originally used, and they're excellent frying fats. To learn more, I highly recommend reading Nina's book The Big Fat Surprise: Why Butter, Meat, and Cheese Belong in a Healthy Diet, which contains nine years' worth of research.