| Because these vegetable oils are not stable when heated, manufacturers began using partial hydrogenation to make the oil more solid.
This process extends the shelf life of the oil and of the products made with it. The process also provides the texture, or "mouth-feel," of butter.
The hydrogenation process: A vegetable oil is first refined using chemical solvents and is then mixed with a metal catalyst, such as nickel oxide. The vegetable oil is then subjected to hydrogen gas in a high-pressure, high-temperature reactor. After that, deodorizing agents and bleaches are added. |
Steven V. Joyal
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 Americans generally consume too many omega-6 fatty acids, which are found mainly in vegetable oils. Evidence suggests that the ratio of omega-6 to omega-3 fatty acids should be no greater than 4:1, and 3:1 is even better. Most Americans have an omega-6 to omega-3 profile of 10:1 or greater. Evidence suggests that an imbalance of this type may increase the level of inflammation in the body and increase the risk of heart disease, arthritis, and certain types of cancer, including prostate cancer. |
David Steinman
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 However, before you start to think a simple pill can do the trick, you need to know that you make things worse by consuming foods made with highly processed and rancid vegetable oils and prepared foods that are rich sources of inflammation-causing arachidonic acid. The COX-2 enzymes in your body convert the arachidonic acid we take in from our poor diets to inflammation-causing prostaglandins. With excessive arachidonic acid, the body also produces 5-HETE, which is the fuel for prostate cancer cells.6 In fact, 5-HETE is absolutely essential for the survival of prostate cancer cells. |
| Not when we have Bio Willie, a biodiesel fuel made from vegetable oils that is ready to go into your tank without any modifications. Bio Willie is the name of the biodiesel product that is named for the redheaded stranger. Nelson found out about biodiesel in Hawaii, where he has a home, after his wife bought a biodiesel-burning car.
Thanks to Willie's celebrity fuel, biodiesel stations are popping up across the country. They offer pure biodiesel and biodiesel/petroleum blends. |
Hyla Cass
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 Aside from GLA from borage oil, which is used as a supplement (oatmeal is another good source), the omega-6 fatty acids found in meat, milk, vegetable oils, seeds, and nuts are rarely scarce in the standard American diet. In fact, although we need them for good health, most of us are consuming too many.
Most of us eat about twenty times more omega-6 fatty acids than omega-3s in products like cereals, whole-grain bread, baked goods, fried foods, margarine, and others. |
Brenda Watson and Leonard Smith
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 By contrast, the third omega-3, called alpha-linolenic acid (ALA), is
FACT
Fish oil is the best source EPA and DHA omega-3 found primarily in dark green leafy vegetables, flaxseed oil, and certain vegetable oils. Although ALA has different influences than DHA and EPA, your body has enzymes that can convert ALA to EPA. EPA, DHA, and ALA are important to human health.
Both omega-3s and -6s are vital to your health, but most people consume too much omega-6 and not enough omega-3. |
| Avoid any bars containing hydrogenated vegetable oils. Look instead for high-oleic sunflower oil, a stable oil that is rich in essential fatty acids.
Shakes: For a filling, meal-like shake, look for a mix that provides 10 grams of fiber (from acacia) per serving, and a decent amount of protein (around 20 grams) from a rich source, such as whey, as well as an array of important vitamins and minerals and an enzyme blend designed to ensure digestion of all classes of foods. Avoid any shakes that contain artificial sugar substitutes. |
Joe Graedon, M.S. and Teresa Graedon, Ph.D.
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 Even though dietitians have been proclaiming that all cholesterol-free vegetable oils are heart healthy, we beg to differ. There is growing evidence that Americans consume way too much omega-6 and not nearly enough omega-3 fats (found in certain fish as well as walnuts and flaxseed). Because of this imbalance, we suggest you try to limit your intake of omega-6-rich vegetable oils.
Which fats are the superstars? Clearly, olive oil is one of the very best. It is high in mono-unsaturated fatty acids, and there are lots of data to support its positive health benefits. |
Jack Challem
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 Partially hydrogenated vegetable oils are manufactured by adding hydrogen atoms to vegetable oils, such as soybean oil, and they are rich in trans-fatty acids. Hydrogenation increases the manufacturability and shelf life of oils, but it has serious health consequences.
Trans-fatty acids are rare in nature, and numerous studies have found that they increase the risk of developing cardiovascular diseases far more than do saturated fats. Is there a safe amount of trans-fatty acids? Many experts say there is not. |
Gabriel Cousens
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 They were put on a diet that was zero in animal fat and low in vegetable oils. A control group was on a cholesterol-lowering diet. The vegetarian group lost about a pound per week, and the control group lost about 8 pounds in total per person.44 The study group's body cells became more and more sensitive to insulin; at fourteen weeks their insulin sensitivity had improved by 24 percent. From these results he theorized that a low-fat diet activated the natural ability to open the insulin receptors in the cells to allow glucose into the system. |
Jack Challem
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| Partially hydrogenated vegetable oils are manufactured by adding hydrogen atoms to vegetable oils, such as soybean oil, and they are rich in trans-fatty acids. Hydrogenation increases the manufacturability and shelf life of oils, but it has serious health consequences.
Trans-fatty acids are rare in nature, and numerous studies have found that they increase the risk of developing cardiovascular diseases far more than do saturated fats. Is there a safe amount of trans-fatty acids? Many experts say there is not. |
Jack Challem
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 Any packaged food that lists "partially hydrogenated" vegetable oils also contains trans fats. Furthermore, be aware that trans fats don't have to be listed on a label if there is less than one-half gram per serving—a "gotcha" because people commonly eat more than one serving at a meal. Incredible as it might sound, trans fats are far more hazardous than saturated fats.
Guideline 10. |
Steven V. Joyal
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| These factors, along with the popularity of fast-food restaurants and processed foods that contain vegetable oils, combined to drastically alter the balance between omega-6 and omega-3 in the Western diet.
Generally, no more than 10 percent of your calories should come from saturated and trans fat (and your goal should be to minimize the amount of trans fat in your diet as much as possible), and since people with diabetes are at high risk for or
BENEFITS OF DIETARY FATS
Essential fatty acids
?help promote healthy nerve function
? |
David Steinman
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| These devils that stimulate inflammatory cascades throughout the body are found in vegetable oils and prepared foods like potato chips. Being gluttons as so many people are, you can imagine then that a lot of us are on fire with high inflammation.
Our diets are so rich in prepared foods that they are thought to cause a whole host of health problems, including arthritis, Alzheimer's, cancer, and diabetes. One of the remedies is to change our diets and use more of what nature has given us: the omega-3 fatty acids. |
Ann M. Coulston and Carol J. Boushey
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 Keep total fat intake between 20% and 35% of calories, with most fats coming from sources of polyunsaturated and monounsaturated fatty acids, such as fish, nuts, and vegetable oils. When selecting and preparing meat, poultry, dry beans, and milk or milk products, make choices that are lean, low fat, or fat free. Limit intake of fat and oils high in saturated or trans-fatty acids, and choose products low in such fats and oils.
Choose fiber-rich fruits, vegetables, and whole grains often. |
Ray Strand, M.D.
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 For example, vegetable oils were made into margarine as a substitute for butter. vegetable oils primarily contain what is known as polyunsaturated fats. These fats do in fact lower LDL, or "bad" cholesterol, but the problem is that they also lower HDL, or "good" cholesterol. Polyunsaturated fats are also vulnerable to oxidation and easily transform into trans-fatty acids, which are rancid fats. These fats make poor building blocks for our cell membranes and are anything but healthy.
Many vegetable oils now go through a process called partial hydro-genation. |
Ann M. Coulston and Carol J. Boushey
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| Industrially produced TFA is made by the hydrogenation of unsaturated vegetable oils. The use of TFA became very popular in the mid-twentieth century when public health recommendations encouraged people to decrease their animal fat and tropical oil intakes. However, research that started in the early 1990s demonstrated numerous adverse effects of TFA [64, 65].
The adverse cardiovascular effects of TFA have been demonstrated in epidemiologic and clinical trials. |
Hyla Cass
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| CoQ10 is found in many foods, mostly meats, vegetable oils (including soybean), fish, nuts, and some vegetables, but the daily intake of the average person through diet is below 5 mg—a fraction of the amount usually taken in supplement form (30 to 300 mg). It's estimated that only about 25 percent of the CoQ10 in your body is supplied through diet.
Supplements of CoQ10 restore normal levels of this nutrient in people who take statin drugs without reducing the drug's effect on cholesterol levels. |
Ann M. Coulston and Carol J. Boushey
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| This dietary pattern promotes consumption of fruits, vegetables, whole grains, low-fat/nonfat dairy products, lean meats, poultry and fish, and liquid vegetable oils, nuts, and seeds. Implementation of this dietary pattern will affect multiple, major CVD risk factors, including lipids and lipoproteins, blood pressure, and body weight, which can markedly decrease CVD risk. |
Ray Strand, M.D.
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| For example, vegetable oils were made into margarine as a substitute for butter. vegetable oils primarily contain what is known as polyunsaturated fats. These fats do in fact lower LDL, or "bad" cholesterol, but the problem is that they also lower HDL, or "good" cholesterol. Polyunsaturated fats are also vulnerable to oxidation and easily transform into trans-fatty acids, which are rancid fats. These fats make poor building blocks for our cell membranes and are anything but healthy.
Many vegetable oils now go through a process called partial hydro-genation. |
Ann M. Coulston and Carol J. Boushey
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| The Oslo Heart Study [74], the Finnish Mental Hospital Study [75], and the Wadsworth Hospital and Veterans Administration Center in Los Angeles Study [76] all observed marked hypocholesterolemic effects of diets very high in PUFA from vegetable oils. Importantly, in two of these studies [75, 76], the cholesterol-lowering response was associated with a reduction in the incidence of CVD (16-34%).
The Nurses' Health Study reported a dose-response relationship regarding CVD risk and PUFA intake with the highest quintile of intake (6. |
| Know the limits on fats, sugars, and salt (sodium)
Make most of your fat sources from fish, nuts, and vegetable oils.
Limit solid fats like butter, margarine, shortening, and lard, as well as foods that contain these.
Check the Nutrition Facts label to keep saturated fats,
Choose food and beverages low i calories with few. if any, nutrients.
MyPyramid.gov
FIGURE 1 MyPyramid: Steps to a healthier you. See color plate.
Like the FGP, MyPyramid consists of five basic food groups: fruits, vegetables, grains, meat/beans, and milk. However, MyPyramid also has an "oils" group. |
| Although there are some subtle differences among them, they all recommend a diet that is high in fruits and vegetables, whole grains, low-fat and skim milk dairy products, lean meats, poultry and fish, legumes, and food sources of unsaturated fats including liquid vegetable oils, and nuts and seeds. All dietary patterns are low in SFA, TFA, and dietary cholesterol and high in dietary fiber. |
Alan R. Gaby, M.D., Jonathan V. Wright, M.D., Forrest Batz, Pharm.D. Rick Chester, RPh., N.D., DipLAc. George Constantine, R.Ph., Ph.D. Linnea D. Thompson, Pharm.D., N.D.
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 Octacosanol is a waxy substance found in vegetable oils and sugar cane (Saccharum officinarum). Another compound, called policosanol, contains a large amount of octacosanol, along with several similar compounds.
Octacosanol has been used in connection with the following conditions (refer to the individual health concern for complete information):
Rating Health Concerns
Who is likely to be deficient?
Because octacosanol is not an essential bodily constituent, deficiencies do not occur.
How much is usually taken? |
Kaayla T. Daniel, PhD, CCN
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 VANASPATI: GHEE WHIZ
Vanaspati is made from hydrogenated vegetable oils and artificially colored and flavored to resemble clarified butter, known in India as ghee. Soft in cool weather and liquid in hot, it is kept slightly grainy as part of the effort to simulate ghee. The vanaspati business first developed in the 1930s with a product that consisted of 85 percent peanut oil, 10 percent cottonseed oil and 5 percent sesame oil, fortified with vitamins A and D. |
| Soft or tub margarines contain greater amounts of unhydrogenated or 'Tightly hydrogenated" liquid vegetable oils. Whipped versions are "whipped up" with nitrogen gas so that the product contains more air. These contain trans fats, but fewer than the stick margarines. The remainder of the margarine market is taken up by various "spreads," liquid margarines in squeezable bottles and diet "imitation" margarines, which are "low calorie" imitations of a product that is itself an imitation. Premium brands may contain some butter and in Europe there is a popular product called Half Butter. |
| Caution is advised until we know whether the problem comes exclusively from processing and/or rancidity or from the vegetable oils themselves. They don't seem to be a problem consumed in whole food rather that extracted oil.30
DuPont took the different tack of hiring plant engineers to breed out the omega-3s and came up with a genetically modified soybean with higher levels of the monounsaturated oleic and saturated stearic acids (both very stable and resistant to rancidity) and an omega-3 content that has been lowered from 8 to 3 percent. |
Alan R. Gaby, M.D., Jonathan V. Wright, M.D., Forrest Batz, Pharm.D. Rick Chester, RPh., N.D., DipLAc. George Constantine, R.Ph., Ph.D. Linnea D. Thompson, Pharm.D., N.D.
See book keywords and concepts |
| Linoleic acid, a common fatty acid found in nuts and seeds and most vegetable oils (including EPO), should theoretically be converted to PGEi; but many things can interfere with this conversion, including disease; the aging process; saturated fat; hydrogenated oils; blood sugar problems; and inadequate vitamin C (page 604), magnesium (page 551), zinc (page 614), and B vitamins (page 603). Supplements that provide GLA circumvent these conversion problems, leading to more predictable formation of PGEi.12
Where is it found?
EPO is found primarily in supplements. |
| Like most vegetable oils, flaxseed oil contains linoleic acid, an essential fatty acid needed for survival. But unlike most oils, it also contains significant amounts of another essential fatty acid, alpha linolenic acid (ALA).
ALA is an omega-3 fatty acid. To a limited extent, the body turns ALA into eicosapentaenoic acid (EPA)— an omega-3 fatty acid found in fish oil (page 514)— which in turn converts to beneficial prostaglandins. (Prostaglandins are hormone-like substances made in many parts of the body rather than coming from one organ, as most hormones do. |
| When nutrition researchers talk about polyunsaturated fatty acids, they are often referring primarily to linoleic acid—a fatty acid found in nuts and seeds and most vegetable oils.
In animal research, the consumption of polyunsaturated fatty acids increases the risk of some cancers.61 However, in humans, most,62'63,64 though not all,65 reports do not find an association between polyunsaturates and cancer risks.
Sugar
A preliminary study has reported an association between an increasing intake of sugar or sugar-containing foods and an increased risk of gallbladder cancer. |
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