I'm frequently amazed at how misinformed even "experts" can be when it comes to nutrition and health. Health and nutrition myths are perpetuated by magazines, health writers, spokespeople from the American Dietetic Association, and many "official" health organizations, many of whom have a vested interest in keeping things as they are. (Remember, statin drugs bring in over 20 billion dollars a year to their makers.) I'm reminded of the famous quote by Upton Sinclair: "It is difficult to get a man to understand something when his salary depends on his not understanding it".
But the thing of it is, it's not just nutrition and health where popular myths continue to live well past what should be their expiration date. So in the spirit of looking outside our immediate area of interest, I compiled a short list of 10 of my favorite examples of "groupthink" that need to be reexamined. Some have to do with nutrition and health but most don't.
See what you think!
1. "
Al Gore Said He Invented The Internet"
Despite the fact that "everyone knows" he said this, he never did-- nor did he even say anything that could reasonably be interpreted as meaning that. The roots of what we now know as the internet began with the military's use of interconnected computers in remote locations. Gore was instrumental in creating programs that extended that practice to civilian use and was instrumental- in an economic and legislative sense- for fostering the development of the technology. He never said or implied that he "invented" the internet, merely that he was one of the sponsors of legislation and policies that helped create what we now know as the web.
2. "
The Bible Says Money Is The Root Of All Evil"
It actually doesn't. It says "the "...
love of money is the root of all evil" (Timothy 6:10), which is quite different. Either way, it's only partially true. An awful lot of evil is perpetrated for reasons that have little to do with money- beheadings, torture, genocide, honor killings come immediately to mind but the list is pretty long and sad. People are willing to do an awful lot of evil things just to prove they're "right" about something.
3.
You Fall Asleep On Thanksgiving Because Of The Tryptophan In TurkeyComplete urban legend. There's a very low amount of tryptophan in turkey (about 1/3 of a gram or 300 mg per 240 calorie portion). You fall asleep after Thanksgiving dinner because you ate too much. Huge meals take a lot of energy to digest, the blood goes to your stomach and gut and you're ready to snooze. Probably doesn't help that most Thanksgiving meals also include a ton of sugar which drops your blood sugar soon after eating it, adding to the brain fog and tiredness.
4.
To Lose Weight, Exercise In The Fat Burning ZoneI've written more than one article on the ridiculousness of this myth, usually under the heading of "Urban Legend". You "burn" fat (technically you beta-oxidize fatty acids) at every level of activity, from sleep to running a 4 minute mile. You burn a higher percentage of fat at lower levels of activity, but it's a higher percentage of a lower number. You're better off burning 40% fat when you're burning 10 calories a minute than 70% percent fat when you're burning 1 calorie a minute! And if you're trying to "burn" fat off your body, high intensity exercise is the way to go, not long slow easy aerobics in some mythical "zone".
5.
You Can Get All The B12 You Need From PlantsNice try on the part of our respected and beloved vegan friends but it's wholly untrue. You simply can't get adequate B-12 from plant sources. That's not just my opinion, but the opinion of the prestigious group of researchers at the National Institutes of Health who say "Because B12 is only found in animal source foods, strict vegetarianism has long been associated with a greater risk of deficiency of this vitamin".
6.
Muscle Weighs More Than FatWhich weighs more, a pound of bricks or a pound of feathers? 'Nuff said. Muscle and fat weigh
exactly the same, but muscle is
denser than fat: therefore, a pound of muscle takes up less
space than a pound of fat.
7.
Anyone Can Edit Wikipedia -- It's Highly InaccurateAs a longtime supporter of Wikipedia, this one continues to irritate me. While it's true that technically "anyone" can contribute to Wikipedia, the entries are vetted by a fanatically conscientious group of editors and experts who check and double check the accuracy of every reference, remove every inaccuracy or anything that could even remotely be considered "opinion", and generally keep the information state of the art. Yes, there was one famous case of a malevolent hacker getting in and altering someone's bio, but it was remarkable in that this has happened so infrequently considering Wiki has 1.2 million entries. The people who continue to lambast Wikipedia for "inaccuracies" never point out that the "inaccuracies" are things like the spelling of the name of one of Dostoeyevsky's nineteen brothers. I've random checked some entries on Wiki for subjects on which I know a lot and have been extremely impressed with their accuracy. It's a great resource.
8.
America Is A Leader When It Comes To Science And MathNot even close. The most recent assessment by the Organization of Economic Cooperation and Development (OECD) a Paris- based agency that conducts regular education evaluations in the world's most industrialized nations, found that American 15 year olds rank 24th out of 29 countries in mathematical literacy! Only Portugal, Italy, Greece Turkey and Mexico score lower. In science we're "merely" mediocre, ranking fourteenth among 25 nations studied. Percentages and fractions are especially problematical for American students, which explains why so few Americans are able to correctly interpret science reporting and fall victim to biased reporting in the newsmedia. Come to think of it, it also explains why things like the "fat burning zone" (based on a misunderstanding of percentages) continues to predominate among aerobics teachers!
9.
Pit Bulls Are Dangerous DogsThe "natural" temperament of pit bulls is so affectionate and loving that the breed standard warns owners not to get them as guard dogs because they're just too darn friendly. The American Temperament Test Society (which tests dogs for temperament) found that 84% of pit bulls passed, about the same as Boston Terriers and Golden Retreivers and Standard Poodles (and
better than Wheaten Terriers!) Their tolerance for children is so great that they used to be called the "nanny dogs". (Remember Petey, from "Our Gang"?) Problem is that dangerous
people tend to be attracted to this wonderful breed, and the things they do to them to train them to be "vicious" is beyond unconscionable. (Think Michael Vick.) I know this is hard to believe when you see pictures of snarling fighting dogs, but remember, pit bulls were bred originally to be dog aggressive. Since they had to be "handled" in the ring by strangers, it was considered a breed defect for them to be "human aggressive". Sure, they're hyper dogs (they are after all terriers) and they can tend towards dog aggression if not socialized properly, but you have absolutely nothing to fear from a pit bull who's been raised by a caring, gentle and experienced owner.
10.
High Cholesterol Causes Heart DiseaseFully half of all heart attacks happen to people with normal cholesterol levels and half of all people who have elevated cholesterol don't have coronary heart disease. The recent scandalous failure of new cholesterol lowering drugs to reduce plaque or prevent heart disease
even though they lowered cholesterol levels just fine should alert us to the fact that we're barking up the wrong tree. You can lower the risk for heart disease by high double digits just by eating fish, exercising, maintaining a healthy weight, eating a ton of fruits and vegetables and not smoking. Compared to what you can do with those five behaviors, lowering cholesterol is insignificant.