Curb Late Night Snacking

Curb Late Night Snacking

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Curb Late Night Snacking

Jerry Seinfeld used to have a joke about his two warring halves: “Night Guy” and “Morning Guy.” “Night Guy” wants to stay up late, and “Morning Guy” really wishes he’d gone to bed earlier. Some of us share a similar dualism in our eating habits. While our morning selves are usually able to find contentment with light, nutritious meals, our nighttime personas just can’t get enough potato chips and pints of ice cream.

MORE: Is Your Snacking Out of Control?

An April 2013 study in the journal Obesity offers an explanation for our dueling selves. A group of researchers from Oregon Health & Science University, Harvard University and Brigham and Women’s Hospital concluded that, thanks to our circadian system—aka our internal body clock—we’re hungriest a few hours before bed time and the least hungry when we wake up.

“We’ve uncovered a rhythm in appetite that we didn’t previously know existed,” says the study’s senior author Steven Shea, Ph.D., director of the Center for Research on Occupational and Environmental Toxicology at Oregon Health & Science University.

The researchers asked a group of adults to spend 13 days in a laboratory on a strict food and activity regimen. The subjects had to rate their appetites throughout the day. Shea and his colleagues found that people felt hungriest around 8 p.m. and the least hungry around 8 a.m. Their desires for sweet, salty and starchy foods, fruits and meat followed a similar pattern.

Shea thinks that the desire to fill up on food before bedtime may have worked well for our ancestors. “I can understand evolutionarily why it became this way—you don’t know when food will come the next day so it’s like a bank,” he says. A suppressed morning appetite can also help you sleep through the night and wake up able to focus on other tasks besides eating, notes Shea. But given the abundant food and late bed times of the Western world, late night cravings may be a recipe for obesity.

MORE: Healthy Desserts That Won’t Derail Your Diet

While Carla Wolper, R.D., a nutritionist and professor at the Center for Eating Disorders at Columbia University Medical Center, would like to see this research examined further—Shea’s study only looked at 12 individuals—she acknowledges that a lot of people have trouble with nighttime eating.

“Your body doesn’t care what time you eat the food,” she explains. “However, if people tend to restrict their eating throughout the day and eat a lot at night, those people tend to be overweight.” In other words, if you come home to the comfort of your house after a busy day and you’re famished, you’ve set yourself up to overeat.

Whether or not we’re biologically programed to be hungrier at night, you don’t have to cave into your body’s after-dark food cravings. Wolper sees meal planning as the best defense against late night splurges. That means plan to eat enough during the day, plan a satisfying dinner, and plan a healthy after-dinner snack. Wolper also stresses removing high-calorie, addictive foods from your home if you know you’re prone to binge. “It’s the same advice you’d give a drug addict,” she says. “Don’t keep heroin in the closet. Get better replacements that are lower in calories.”

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