Question: What makes fast food unhealthy?

Junk food


Junk food is a pejorative term for food containing a large number of calories from sugar or fat with little dietary fiber, protein, vitamins or minerals.[1][2][3] The term can also refer to high protein food like meat prepared with saturated fat.[4] The term HFSS foods (high in fat, salt and sugar) is used synonymously.[5][6] Fast food and fast food restaurants are often equated with junk food, although fast foods cannot be categorically described as junk food.[7][8][9][10] The term junk food dates back at least to the early 1950s.[11]
Concerns about the negative health effects resulting from a junk food-heavy diet, especially obesity, have resulted in public health awareness campaigns, and restrictions on advertising and sale in several countries.[12][13][14]
Origin of the term
The term junk food dates back at least to the early 1950s, although it has been reported that it was coined in 1972 by Michael F. Jacobson of the Center for Science in the Public Interest.[3] In 1952, it appeared in a headline in the Lima, Ohio, News, "'Junk Foods' Cause Serious Malnutrition", for a reprint of a 1948 article from the Ogden, Utah, Standard-Examiner, originally headlined, "Dr. Brady’s Health Column: More Junk Than Food". In it, Dr. Brady writes, "What Mrs. H calls 'junk' I call cheat food. That is anything made principally of (1) white flour and or (2) refined white sugar or syrup. For example, white bread, crackers, cake, candy, ice cream soda, chocolate malted, sundaes, sweetened carbonated beverages."[15] The term cheat food can be traced back in newspaper mentions to at least 1916.[16]
Definitions

In Andrew F. Smith's Encyclopedia of Junk Food and Fast Food, junk food is defined as "those commercial products, including candy, bakery goods, ice cream, salty snacks, and soft drinks, which have little or no nutritional value but do have plenty of calories, salt, and fats. While not all fast foods are junk foods, most are. Fast foods are ready-to-eat foods served promptly after ordering. Some fast foods are high in calories and low in nutritional value, while other fast foods, such as salads, may be low in calories and high in nutritional value."[7]
Junk foods have empty calories, i.e. the energy content is not complemented with proteins and lipids required for a nutritious diet.
Foods commonly considered junk foods include salted snack foods, chewing gum, candy, sweet desserts, fried fast food, and sugary carbonated beverages.[17] Many foods such as hamburgers, pizza, and tacos can be considered either healthy or junk food depending on their ingredients and preparation methods.[18] The more highly processed items usually fall under the junk food category,[19] including breakfast cereals that are mostly sugar or high fructose corn syrup and white flour or milled corn.[20]
In the book, Panic Nation: Unpicking the Myths We're Told About Food and Health, it is argued that the junk food label is nutritionally meaningless: food is food, and if there is zero nutritional value, then it isn't a food.[21] Co-editor Vincent Marks explains, "To label a food as 'junk' is just another way of saying, 'I disapprove of it.' There are bad diets - that is, bad mixtures and quantities of food - but there are no 'bad foods' except those that have become bad through contamination or deterioration."[22]
History
According to an article in the New York Times, "Let Us Now Praise the Great Men of Junk Food", "The history of junk food is a largely American tale: It has been around for hundreds of years, in many parts of the world, but no one has done a better job inventing so many varieties of it, branding it, mass-producing it, making people rich off it and, of course, eating it."[23]
Popularity and appeal
Junk food in its various forms is extremely popular, and an integral part of modern popular culture. In the US, annual fast food sales are in the area of $160 billion,[24] compared to supermarket sales of $620 billion[25] (a figure which also includes junk food in the form of convenience foods, snack foods, and candy). In 1976, "Junk Food Junkie", the tale of a junk food addict who pretends to follow a healthy diet by day, while at night he clandestinely gorges on Hostess Twinkies and Fritos corn chips, McDonald's and KFC, became a Top 10 pop hit in the US.[26] Thirty-six years later, Time placed the Twinkie at #1 in its "Top 10 Iconic Junk Foods" special feature: "Not only...a mainstay on our supermarket shelves and in our bellies, they've been a staple in our popular culture and, above all, in our hearts. Often criticized for its lack of any nutritional value whatsoever, the Twinkie has managed to persevere as a cultural and gastronomical icon."[27]
America also celebrates an annual National Junk Food Day on July 21. Origins are unclear; it is one of around 175 US food and drink days, most created by "people who want to sell more food", at times aided by elected officials at the request of a trade association or commodity group.[28] "In honor of the day," Time in 2014 published, "5 Crazy Junk Food Combinations". Headlines from other national and local media coverage include: "Celebrate National Junk Food Day With… Beer-Flavored Oreos?" (MTV);[29] "National Junk Food Day: Pick your favorite unhealthy treats in this poll" (Baltimore);[30] "Celebrities' favorite junk food" (Los Angeles);[31] "A Nutritionist's Guide to National Junk Food Day" with "Rules for Splurging" (Huffington Post);[32] and "It's National Junk Food Day: Got snacks?" (Kansas City).[33]
As for junk food's appeal, there is no definitive scientific answer, both physiological and psychological factors are cited. Food manufacturers spend billions of dollars on R&D, to create flavor profiles that trigger the human affinity for sugar, salt, and fat. Consumption results in pleasurable, likely addictive, effects in the brain. At the same time, massive marketing efforts are deployed, creating powerful brand loyalties that studies have shown will trump taste.[34]
It is well-established that the poor eat more junk food overall than the more affluent, but the reasons for this are not clear.[35] Few studies have focused on variations in food perception according to socio-economic status (SES); some studies that have differentiated based on SES suggest that the economically challenged don't perceive healthy food much differently than any other segment of the population.[36] Recent research into scarcity, combining behavioral science and economics, suggests that, faced with extreme economic uncertainty, where even the next meal may not be a sure thing, judgment is impaired and the drive is to the instant gratification of junk food, rather than to making the necessary investment in the longer-term benefits of a healthier diet.[37][38]
Health effects
When junk food is consumed very often, the excess fat, simple carbohydrates, and processed sugar found in junk food contributes to an increased risk of obesity, cardiovascular disease, and many other chronic health conditions.[39] A case study on consumption of fast foods in Ghana suggested a direct correlation between consumption of junk food and obesity rates. The report asserts that obesity resulted in related complex health concerns such upsurge of heart attack rates.[40] Studies reveal that as early as the age of 30, arteries could begin clogging and lay the groundwork for future heart attacks.[41] Consumers also tend to eat too much in one sitting, and those who have satisfied their appetite with junk food are less likely to eat healthy foods like fruit or vegetables.[42]
Testing on rats has indicated negative effects of junk food that may manifest likewise in people. A Scripps Research Institute study in 2008 suggested that junk food consumption alters brain activity in a manner similar to addictive drugs like cocaine and heroin. After many weeks with unlimited access to junk food, the pleasure centers of rat brains became desensitized, requiring more food for pleasure; after the junk food was taken away and replaced with a healthy diet, the rats starved for two weeks instead of eating nutritious fare.[43][44] A 2007 study in the British Journal of Nutrition found that female rats who eat junk food during pregnancy increased the likelihood of unhealthy eating habits in their offspring.[45]
Other research has been done on the impact of sugary foods on emotional health in humans, and has suggested that consumption of junk food can negatively impact energy levels and emotional well-being.[46]
Behavior problems
In a study published in the European Journal of Clinical Nutrition, the frequency of consumption of 57 foods/drinks of 4000 children at the age of four and a half were collected by maternal report. At age seven, the 4000 children were given the Strengths and Difficulties Questionnaire (SDQ), with five scales: hyperactivity, conduct problems, peer problems, emotional symptoms and pro-social behavior. A one standard deviation increase in junk food was then linked to excessive hyperactivity in 33% of the subjects, leading to the conclusion that children consuming excess junk food at the age of seven are more likely to be in the top third of the hyperactivity scale. There was no significant correlation between junk food and the other scales.[47]
Anti-junk food measures
A number of countries have adopted, or are considering, various forms of legislated action to curb junk food consumption. In 2014, United Nations Special Rapporteur on the right to health, Anand Grover, released his report, "Unhealthy foods, non-communicable diseases and the right to health", and called for governments to "take measures, such as developing food and nutrition guidelines for healthy diets, regulating marketing and advertising of junk food, adopting consumer-friendly labelling of food products, and establishing accountability mechanisms for violations of the right to health."[48]
An early, high-profile and controversial attempt to identify and curb junk food in the American diet was launched by the so-called McGovern Committee, formally, the United States Senate Select Committee on Nutrition and Human Needs, between 1968 and 1977, chaired by Senator George McGovern. Initially formed to investigate malnutrition and hunger in the US, the committee's scope progressively expanded to include environmental conditions that affected eating habits, like urban decay,[49] then focused on the diet and nutritional habits of the American public. It criticized the use of salt, sugar and fat in processed foods, noted problems with overeating and the high percentage of ads for junk food on TV, and stated that bad eating habits could be as deadly as smoking. The findings were heavily criticized and rebutted from many directions, including the food industry, the American Medical Association, and within the committee itself. In 1977, the committee issued public guidelines under the title, Dietary Goals for the United States, which became the predecessor to Dietary Guidelines for Americans, published every five years beginning in 1980 by the US Department of Health and Human Services.[50][51]
Taxation

In an attempt to reduce junk food consumption through price control, forms of Pigovian taxation have been implemented. Targeting saturated fat consumption, Denmark introduced the world's first fat-food tax in October, 2011, by imposing a surcharge on all foods, including those made from natural ingredients, that contain more than 2.3 percent saturated fat, an unpopular measure that lasted a little over a year.[52][53][54] Hungary has imposed taxes on foods and beverages high in added sugar, fat, and salt.[55] Norway taxes refined sugar, and Mexico has various excises on unhealthy food.[56] On April 1, 2015, the first fat tax in the US, the Navajo Nation's Healthy Diné Nation Act of 2014, mandating a 2% junk food tax, came into effect, covering the 27,000sqmi (70,000km2) of Navajo reservation; the Act targeted problems with obesity and diabetes among the Navajo population.[57]
Advertising restriction

Junk food that is targeted at children is a contentious issue. In "The Impact of Advertising on Childhood obesity", the American Psychological Association reports: "Research has found strong associations between increases in advertising for non-nutritious foods and rates of childhood obesity."[58] The World Health Organization recommends that governments take action to limit children's exposure to food marketing, stating, "Many advertisements promote foods high in fats, sugar and salt, consumption of which should be limited as part of a healthy diet. ... Food advertising and other forms of marketing have been shown to influence children’s food preferences, purchasing behaviour and overall dietary behaviour. Marketing has also been associated with an increased risk of overweight and obesity in children. The habits children develop early in life may encourage them to adopt unhealthy dietary practices which persist into adulthood, increasing the likelihood of overweight, obesity and associated health problems such as diabetes and cardiovascular diseases."[12]
In the UK, efforts to increasingly limit or eliminate advertising of foods high in sugar, salt or fat at any time when children may be viewing are ongoing.[59]  The UK government has been criticized for failing to do enough to stop advertising and promotion of junk food aimed at children.[60]  A UK parliamentary select committee recommended that cartoon characters advertising unhealthy food to children should be banned, supermarkets should have to remove unhealthy sweets and snacks from ends of isles and checkout areas, local authorities should be able to limit the number of fast food outlets in their area, brands associated with unhealthy foods should be banned from sponsoring sports clubs, youth leagues and tournaments, and social media like Facebook should cut down junk food advertising to children—all are currently just recommendations.[61]
In Australia, a Wollongong University study in 2015 showed that junk food sponsors were mentioned over 1,000 times in a single Australian cricket match broadcast, which included ads, and branding worn on players' uniforms and on the scoreboard and pitch. A coalition of Australian obesity, cancer and diabetes organizations called on Cricket Australia, the sport's governing body, to "phase out sponsorships with unhealthy brands", emphasizing that cricket is a "healthy, family-oriented sport" with children in the audience.[62]
See also


Obesity
Comfort food
Dude food
Glutamic acid (flavor), common flavoring compounds and their synthetic versions, which may be added to some processed foods, to boost their savoriness
Health food, foods that tend to be nutrient rich, and may be eaten for their potential benefits to health
List of food additives
Nutrient profiling



Further reading









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