How to spot a fad diet - Mia Nacamulli

993,705 views ・ 2016-04-11

TED-Ed


Please double-click on the English subtitles below to play the video.

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Conventional wisdom about diets,
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including government health recommendations,
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seems to change all the time.
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And yet, ads routinely come about
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claiming to have the answer about what we should eat.
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So how do we distinguish what's actually healthy
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from what advertisers just want us to believe is good for us?
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Marketing takes advantage of the desire to drop weight fast,
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and be stronger,
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slimmer,
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and brighter.
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And in the big picture, diet plans promising dramatic results,
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known as fad diets,
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are just what they seem: too good to be true.
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So where do diet fads even come from?
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While the Ancient Greeks and Romans
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rallied behind large-scale health regimens centuries earlier,
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this phenomenon began in earnest in the Victorian Era
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with crazes like the vinegar diet
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and the Banting Diet.
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Since then, diets have advised us all sorts of things:
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to excessively chew,
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to not chew at all,
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to swallow a grapefruit per meal,
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non-stop cabbage soup,
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even consumption of arsenic,
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or tapeworms.
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If the idea of diet crazes has withstood history,
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could this mean that they work?
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In the short term, the answer is often yes.
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Low-carbohydrate plans,
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like the popular Atkins or South Beach Diets,
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have an initial diuretic effect.
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Sodium is lost until the body can balance itself out,
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and temporary fluid weight loss may occur.
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With other high-protein diets, you might lose weight at first
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since by restricting your food choices,
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you are dropping your overall calorie intake.
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But your body then lowers its metabolic rate to adjust to the shift,
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lessening the diet's effect over time
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and resulting in a quick reversal if the diet is abandoned.
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So while these diets may be alluring early on,
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they don't guarantee long-term benefits for your health and weight.
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A few simple guidelines, though, can help differentiate between
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a diet that is beneficial in maintaining long-term health,
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and one that only offers temporary weight changes.
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Here's the first tipoff:
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If a diet focuses on intensely cutting back calories
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or on cutting out entire food groups,
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like fat, sugar, or carbohydrates,
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chances are it's a fad diet.
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And another red flag is ritual,
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when the diet in question instructs you to only eat specific foods,
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prescribed combinations,
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or to opt for particular food substitutes,
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like drinks, bars, or powders.
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The truth is shedding pounds in the long run
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simply doesn't have a quick-fix solution.
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Not all diet crazes tout weight loss.
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What about claims of superfoods, cleanses, and other body-boosting solutions?
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Marketing emphasizes the allure
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of products associated with ancient and remote cultures
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to create a sense of mysticism for consumers.
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While so-called superfoods, like blueberries or açaí,
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do add a powerful punch of nutrients,
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their super transformative qualities are largely exaggeration.
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They are healthy additions to a balanced diet,
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yet often, they're marketed as part of sugary drinks or cereals,
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in which case the negative properties outweight the benefits.
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Cleanses, too, may be great in moderation
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since they can assist with jumpstarting weight loss
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and can increase the number of fresh fruits and vegetables consumed daily.
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Scientifically speaking, though,
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they've not yet been shown to have either a long-term benefit
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or to detox the body any better than the natural mechanisms already in place.
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Everywhere we look,
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we're offered solutions to how we can look better,
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feel fitter,
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and generally get ahead.
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Food is no exception,
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but advice on what we should eat is best left to the doctors and nutritionists
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who are aware of our individual circumstances.
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Diets and food fads aren't inherently wrong.
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Circumstantially, they might even be right,
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just not for everyone all of the time.
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