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Margarine
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Margarine ( or ), as a generic term, can indicate any of a wide range of butter substitutes. In many parts of the world, margarine has become the best-selling table spread, although butter and olive oil also command large market shares. Margarine is an ingredient in the preparation of many other foods.
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Encyclopedia
Margarine ( or ), as a generic term, can indicate any of a wide range of butter substitutes. In many parts of the world, margarine has become the best-selling table spread, although butter and olive oil also command large market shares. Margarine is an ingredient in the preparation of many other foods. In some regions people may refer to margarine as butter in informal speech, but in several countries laws forbid food packaging to refer to margarine as "butter". Recipes sometimes refer to margarine as oleo.
History
Margarine originates with the discovery by Michel Eugène Chevreul in 1813 of "margaric acid" (itself named after the pearly deposits of the fatty acid from Greek or µ???a??? (margarís, -îtes / márgaron), meaning "a pearl-oyster" or "a pearl"). Scientists at the time regarded margaric acid, like oleic acid and stearic acid, as one of the three fatty acids which, in combination, formed most animal fats. In 1853 the German structural chemist Wilhelm Heinrich Heintz analyzed margaric acid as simply a combination of stearic acid and of the previously unknown palmitic acid.
In 1869 Emperor Louis Napoleon III of France offered a prize to anyone who could make a satisfactory substitute for butter, suitable for use by the armed forces and the lower classes. French chemist Hippolyte Mège-Mouriés invented a substance he called oleomargarine, the name of which became shortened to the trade name "Margarine". Margarine now refers generically to any of a range of broadly similar edible oils. The name oleomargarine is sometimes abbreviated to oleo.
Manufacturers produced oleomargarine by taking clarified vegetable fat, extracting the liquid portion under pressure, and then allowing it to solidify. When combined with butyrin and water, it made a cheap and more-or-less palatable butter-substitute. Sold as Margarine or under any of a host of other trade names, butter-substitutes soon became a substantial market segment, but too late to help Mège-Mouriés. Although he expanded his initial manufacturing operation from France to the United States in 1873, he had little commercial success. By the end of the decade both the old world and the new could buy artificial butters.
As early as 1877 the first U.S. states had passed laws to restrict the sale and labeling of margarine. By the mid-1880s the United States federal government had introduced a tax of two cents per pound, and manufacturers needed an expensive license to make or sell the product. Individual states began to require the clear labeling of margarine.
Margarine naturally appears white or almost white: by forbidding the addition of artificial coloring agents, legislators found that they could keep margarine from being bought. Bans on coloration became commonplace around the world and endured for almost 100 years. It did not become legal to sell colored margarine in Australia, for example, until the 1960s.
Margarine in the United States
In the United States, the color bans, drafted by the butter lobby, began in the dairy states of New York and New Jersey. In several states, the legislature enacted laws to allow margarine manufacturers to add pink colorings to make the product look unpalatable, but the Supreme Court struck down New Hampshire's law and overruled these measures. By the start of the 20th century, eight out of ten Americans could not buy yellow margarine, and those that could had to pay a hefty tax on it. Bootleg colored margarine became common, and manufacturers began to supply food-coloring capsules so that the consumer could knead the yellow color into margarine before serving it. Nevertheless, the regulations and taxes had a significant effect: the 1902 restrictions on margarine color, for example, cut annual U.S. consumption from 120 million to 48 million pounds (54,000 to 22,000 tons). However, by the end of the 1910s, it had become more popular than ever .
With the coming of World War I, margarine consumption increased enormously, even in unscathed regions like the United States. In the countries closest to the fighting, dairy products became almost unobtainable and were strictly rationed. The United Kingdom, for example, depended on imported butter from Australia and New Zealand and the risk of submarine attack meant that little arrived.
The long-running rent-seeking battle between the margarine and dairy lobbies continued: In the United States, the Great Depression brought a renewed wave of pro-dairy legislation; the Second World War, a swing back to margarine. Post-war, the margarine lobby gained power and, little by little, the main margarine restrictions were lifted, the most recent state to do so being Wisconsin in 1967. However, some vestiges of the legal restrictions remain in the U.S.: The Food, Drug, and Cosmetic Act still prohibits the retail sale of margarine in packages larger than one pound. The sale of yellow margarine remains illegal in the U.S. state of Missouri.
Margarine in Canada
In Canada, margarine was banned from 1886 until 1948 though this ban was temporarily lifted from 1917 until 1923 due to dairy shortages. Nevertheless, bootleg margarine was produced in neighboring British colony of Newfoundland from whale, seal and fish oil by the Newfoundland Butter Company (which, in fact, produced only margarine) and was smuggled to Canada where it was widely sold for half the price of butter. The Supreme Court of Canada lifted the margarine ban in 1948 in the Margarine Reference. In 1950, as a result of a court ruling giving provinces the right to regulate the product, rules were implemented in much of Canada regarding margarine's color, requiring it to be bright yellow or orange in some provinces or colorless in others. By the 1980s, most provinces had lifted the restriction, however, in Ontario it was not legal to sell butter-colored margarine until 1995. Quebec, the last Canadian province to regulate margarine coloring, repealed its law requiring margarine to be colorless in July, 2008.
Margarine today
In the meantime, margarine manufacturers had made many changes. Modern margarine can be made from any of a wide variety of animal or vegetable fats, and is often mixed with skimmed milk, salt, and emulsifiers. Margarine made from vegetable oils is especially important in today's market, as it provides a vegan and pareve substitute for butter. Nearly all margarine is salted, which makes shortening (which contains no salt) a better choice for baking.
In terms of microstructure, margarine is a water-in-oil emulsion, containing dispersed water droplets of typically 5-10 µm diameter. The amount of crystallizing fat in the continuous oil+fat phase determines the firmness of the product. In the relevant temperature range, saturated fats contribute most to the amount of crystalline fat, whereas monounsaturated and polyunsaturated fats contribute relatively little to the amount of crystalline fat in the product. Mono- and polyunsaturated fats and oils can be transformed into suitable substrates by the chemical process of hydrogenation, which renders them solid at room temperature. Full hydrogenation results in saturated fats only, but partial hydrogenation will lead to the formation of trans-fats as well.
Three main types of margarine are common:
- Hard, generally uncolored margarine for cooking or baking. (Shortening)
- "Traditional" margarines for such uses as spreading on toast, which contain saturated fats, are mostly made from vegetable oils.
- Margarines high in mono- or polyunsaturated fats, which are made from safflower, sunflower, soybean, cottonseed, rapeseed, or olive oil.
Many popular table spreads today are blends of margarine and butter — something that was long illegal in countries including the United States and Australia — and are designed to combine the lower cost and easy-spreading of artificial butter with the taste of the real thing.
Margarine, particularly polyunsaturated margarine, has become a major part of the Western diet. In the United States, for example, in 1930 the average person ate over 18 lb (8 kg) of butter a year and just over 2 lb (900g) of margarine. By the end of the 20th century, an average American ate just under 4 lb (1.8 kg) of butter and nearly 8 lb (3.6 kg) of margarine.
Under European Union directives, margarine products cannot be called "butter", even if most of it consists of natural butter. In some European countries butter based table spreads and margarine products are marketed as "butter mixtures".
These "butter mixtures" compose a significant portion of the table spread market. The brand "I Can't Believe It's Not Butter" spawned a variety of similarly-named spreads that can be found on supermarket shelves all over the world. With names like "Utterly Butterly," "You'd Butter Believe it," "Beautifully Butterfully," "Unbelievable! This Is Not Butter," and "Butterlicious," these butter mixtures avoid the restrictions on labeling with marketing techniques that imply a strong similarity to real butter.
The United States imports 10 billion pounds (4.5 million tons) of margarine a year. Additionally, the United States exports 2 billion pounds (900,000 tons) of margarine annually.
Margarine has a particular market in Orthodox Jews and others who observe the laws of Kashrut (the Jewish dietary laws). Kashrut forbids the mixing of meat and dairy products, and hence there are strictly Kosher non-dairy margarines available. These are often used by the Kosher consumer to adapt recipes that use meat and butter, or in baked goods that will be served with meat meals. The 2008 Passover margarine shortage caused much consternation within the Kosher-observant community.
Nutrition
Discussions concerning the nutritional value of margarine revolve around two aspects — the total amount of fat, and the types of fat (saturated fat, trans fat). Usually, a comparison between margarine and butter is included in this context as well.
Amount of fat
Fat is an essential part of nutrition. It is needed in the production of cell membranes, as well as in several hormone-like compounds called eicosanoids. In addition, fat acts as carrier for fat-soluble vitamins A, D, E and K.
The roles of butter and traditional margarine (80% fat) are similar with respect to their energy content, but low-fat margarines and spreads are widely available.
Saturated fat
The saturated fatty acids in triglycerides contribute to elevated blood cholesterol levels, which in turn has been linked to cardiovascular diseases. Saturated fat increases both LDL and HDL cholesterol.
Vegetable fats can contain anything between 7% and 86% saturated fatty acids. Liquid oils (unhardened canola oil, sunflower oil) tend to be on the low end, while tropical oils (coconut oil, palm kernel oil) and fully hardened oils are at the high end of the scale. A margarine blend is a mixture of both types of components, and will rarely exceed 50% saturated fatty acids on fat. Exceptions are some traditional kitchen margarines or products that have to maintain stability under tropical conditions. Generally, firmer margarines contain more saturated fat.
Regular butterfat contains about 65% saturated fatty acids on fat, although this varies somewhat with season. One tablespoon of butter contains over 7g of saturated fat.
Unsaturated fat
The unsaturated fatty acids decrease LDL cholesterol (the "bad" cholesterol) levels and increase HDL cholesterol (the "good" cholesterol) levels in the blood, thus reducing the risk of contracting cardiovascular diseases..
There are two types of unsaturated oils — mono- and polyunsaturated fats. Their nutritional and health effects are recognized in contrast to saturated fats. Some widely grown vegetable oils, such as rapeseed (and its variant canola), sunflower, safflower, and olive oils contain high amounts of unsaturated fats. During the manufacture of margarine, some of the unsaturated fats may be converted into saturated fats or trans fats in order to give them a higher melting point so that they are solid at room temperatures.
- Omega-3 fatty acids are a family of polyunsaturated fatty acids, which have been found especially good for health (see the main article). This is one of the two Essential fatty acids, so called because humans cannot manufacture it and must get it from food. Most modern Western diets are severely deficient in it. Omega-3 fatty acids are mostly obtained from oily fish caught in high-latitude waters. They are comparatively uncommon in vegetable sources. However, one type of Omega-3 fatty acid, alpha-lineloic acid (ALA) can be found in some vegetable oils. Flax oil contains 30-50% of ALA, and is becoming a popular dietary supplement to rival fish oils; both are often added to premium margarines. An ancient oil plant, camelina sativa, has recently gained popularity because of its high Omega-3 content (30-45%), and it has been added to some margarines. Hemp oil contains about 20% ALA. Small amounts of ALA are found in vegetable oils such as soybean oil (7%), rapeseed oil (7%) and wheat germ oil (5%).
- Omega-6 fatty acids are also important for health. They include the Essential Fatty Acid Linoleic Acid (LA), which is abundant in vegetable oils grown in temperate climates. Some, such as hemp (60%) and the common margarine oils corn (60%), cottonseed (50%) and sunflower (50%), have large amounts, but most temperate oil seeds have over 10% LA. Modern Western diets are frequently quite high in Omega-6 but very deficient in Omega-3. The Omega-6 to Omega-3 ratio is typically 10:1 to 30:1. Large amounts of Omega-6 decreases the effect of Omega-3. Therefore it is recommended that the ratio in the diet should be less than 4:1, although optimal ratio may be closer to 1:1.
Trans fat
Several large studies indicate a link between consumption of high amounts of trans fat and coronary heart disease, and possibly some other diseases. This is mainly because trans fats increase the amount of LDL cholesterol and decrease the amount of HDL cholesterol in blood stream. The United States Food and Drug Administration (FDA), the National Heart, Lung and Blood Institute and the American Heart Association (AHA) all have recommended people to limit intake of trans-fat.
Trans fats occur naturally in vegetable oils in only tiny quantities. However, they are a consequence of partial hydrogenation of light oils, intended to solidify the oil sufficiently for it to take on the eating quality of butter oil. In contrast, full hydrogenation generates few trans fats, but is intended to turn light oils into fully saturated fats. The intended effect of partial hydrogenation is to straighten the molecule of polyunsaturated fatty acids, so that they behave more like saturated fats. These trans fatty acids are used by the body like saturated fats, mainly as fuel, but tend to block the use of Omega-3 and Omega-6 for vital bodily functions. They have been indicted as worse for health than even the well-publicized saturated fats in butter and meat.
Particularly in the US, partial hydrogenation has been common as a result of national dependence on a limited number of vegetable oil sources, US-grown oils being preferred to tropical oils which are principally saturated fat. However, in other parts of the world, the industry started to move away from using partially hydrogenated oils in the mid-1990s. This led to the production of new margarine varieties that contain less or no trans fat. Many manufacturers in the US now label their products (following government regulations) as "zero grams" trans-fat, which effectively means less than 500 mg trans-fat per serving; however, no fat is entirely free of trans fats. For example, natural butterfat contains 2-5% trans-fatty acids (mainly trans-vaccenic acid, a variant of the normal vaccenic acid).
Cholesterol
Typically about 70% of human cholesterol is produced by the human body and only 30% comes from food sources. Thus intake of cholesterol as food has less effect on blood cholesterol levels than the type of fat eaten. However, some individuals are more responsive to dietary cholesterol than others. The U.S. Food and Drug Administration states that healthy people should not consume more than 300 mg of cholesterol each day.
Butter contains approximately 33 mg of cholesterol in each tablespoon. Margarine contains only negligible amounts of or no cholesterol.
Plant sterol/stanol esters
Plant sterol esters or plant stanol esters have been added to some margarines and spreads because of their cholesterol lowering effect.
Several studies have indicated that consumption of about 2 grams per day provides a reduction in LDL cholesterol of about 10%.
Sterol/stanol esters are tasteless and odorless, and have the same physical and chemical properties typical of most fats. However, they do not enter the blood stream but instead pass through the gut. This property is what makes a low-fat margarine spread a good choice for the delivery of sterol/stanol esters.
See also
- Category:Margarine brands
External links
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- American Heart Association
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- (includes information on health concerns connected with margarine and certain oils)
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