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Is sugar worse for you than, say, cocaine? According to a 2012 article in the journal Nature, it's a toxic substance that should be regulated like tobacco and alcohol. Researchers point to studies that show that too much sugar (both in the form of natural sucrose and high-fructose corn syrup) not only makes us fat, it also wreaks havoc on our liver, mucks up our metabolism, impairs brain function, and may leave us susceptible to heart disease, diabetes, even cancer. So far, no federal action has been taken (advocates blame industry lobbyists), and experts say simply raising awareness isn't enough, especially when 80 percent of our food choices contain sugar. "It's like watching a train wreck in slow motion," says coauthor Laura Schmidt, Ph.D., a researcher at the University of California, San Francisco.
Nevertheless, after the shock of hearing the news, many of us shrugged and turned back to our cupcakes. Yet, truth is, women in their 20s and 30s may already be feeling the effects of too much sugar without even realizing it. Here, the most common sugar-induced issues and how to beat them to prevent long-term damage—and feel your best right now.
STRESS EATING For a pick-me-up, you may feel the urge to inhale a bag of M&M's or scarf down a box of cookies. But the impulse goes deeper. To examine the hold sugar can have over us, substance-abuse researchers have performed brain scans on subjects eating something sweet. What they've seen resembles the mind of a drug addict: When tasting sugar, the brain lights up in the same regions as it would in an alcoholic with a bottle of gin. Dopamine—the so-called reward chemical—spikes and reinforces the desire to have more. (Sugar also fuels the calming hormone serotonin.)
THE FIX In times of stress, dieters are more likely to binge, studies conclude. That said, a cookie once in a while (say, twice a week) is fine, but on most days go for oatmeal with brown sugar, suggests Jeffrey Fortuna, Ph.D., a health and behavior lecturer at California State University, Fullerton. The whole grains fill you up and the sweetness is just enough to release serotonin.
INEXPLICABLE WEIGHT GAIN You stay away from burgers and drink diet soda. But sugar—both real and artificial—is the secret saboteur. When the pancreas senses sugar, the body releases insulin, which causes cells in the liver, muscle, and fat tissue to take up glucose from the blood, storing it as glycogen for energy. Eat too much at once, though, and insulin levels spike, then drop. The aftermath? You feel tired, then crave more sustenance to perk up. Faux sugars don't help. "Artificial sweeteners travel to the part of the brain associated with desire but not to the part responsible for reward," says Dr. Gene-Jack Wang, a researcher at Brookhaven National Laboratory in Upton, New York. Nor do they trigger the release of the satiety hormones that real sugar does, so you're more likely to consume more calories.
THE FIX Feed sweet cravings with fruit (the fiber will help keep insulin in check), and sub in sparkling water for diet soda. If you must indulge, go for a small snack made with real sugar, and eat slowly. Add fruit or yogurt to feel fuller and prevent a crash.
BRAIN FOG Blanking out in the middle of a meeting? Research out of the University of California, Los Angeles, suggests that sugar forms free radicals in the brain's membrane and compromises nerve cells' ability to communicate. This could have repercussions in how well we remember instructions, process ideas, and handle our moods, says Fernando Gómez-Pinilla, Ph.D., author of the UCLA study.
THE FIX Stay under the USDA limit of 10 teaspoons (40 grams) of added sugar a day. Read labels and available nutrition information at chains: A 16-ounce Starbucks vanilla latte and Einstein Bros. bagel will max out your day's allotment! A wiser choice: black coffee and plain yogurt with antioxidant-rich blueberries and walnuts, sweetened with honey.
AGING SKIN Sugar causes premature aging, just as cigarettes and UV rays do. With young skin (generally under 35), when skin support structures collagen and elastin break down from sun or other free-radical exposure, cells repair themselves. But when sugar travels into the skin, its components cause nearby amino acids to form cross-links. These cross-links jam the repair mechanism and, over time, leave you with premature wrinkles.
THE FIX Once cross-links form, they won't unhitch, so keep sugar intake to as close to zero as you can. "It's the enemy," says Dr. William Danby, a dermatologist with Dartmouth Medical School in New Hampshire. Avoid soda and processed pastries and trade sugar packets for cinnamon—it slows down cross-linking, as do cloves, oregano, ginger, and garlic.
A SLUGGISH WORKOUT Muscles need sugar for fuel, so carbs (which break up into glucose, a type of sim-ple sugar) can kick-start your morning jog. But fruit or prepackaged snacks touting "natural sweeteners" contain just fructose, which is metabolized in the liver, not the muscles. The result: bloat, or even the runs.
THE FIX A glucose-packed snack with just 4 to 8 grams of fructose—it'll help increase glucose absorption, says Dr. Richard Johnson, professor of medicine at the University of Colorado, Denver. Try a sports drink like Gatorade or trail mix with dried fruit an hour before your workout.
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