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Teenagers who have snacks throughout the day are less likely to be overweight or obese than their peers who limit themselves to larger meals, a new study suggests.
The study, of 5,800 U.S. teenagers included in a government health survey, found that rates of obesity, and abdominal obesity specifically, declined with the number of snacks kids had each day.
Of teens who said they did not snack, 39 percent were overweight or obese; that compared with rates of 30 percent, 28 percent and 22 percent among their peers who consumed two, three or four or more snacks in a day, respectively.
Similarly, the rate of abdominal obesity was 24 percent among non-snacking teens, while the lowest rate – 11 percent – was seen in the four-snack-a-day group.
The findings, published in the American Journal of Clinical Nutrition, add to a conflicting body of research on whether snacking is good or bad for the waistline.
Some studies have linked snacking to lower body weight, while others have not. And while there is some evidence of metabolic benefits in having more-frequent, smaller meals throughout the day – in managing cholesterol levels and diabetes, for instance -- it is not clear whether such eating patterns help prevent weight gain or promote weight loss.
What's more, if people do not balance their snacking by eating less at meal time, that between-meal "grazing" could help pack on the pounds.
In one recent study, researchers found that U.S. children increased their snacking between 1977 and 2006 – downing an average of three snacks per day in the most recent year. Desserts and sugary drinks were the top sources of snack calories, the researchers found, and they speculated that this trend "toward constant eating" may be one of the reasons for the rise in childhood obesity.
In the new study, however, "snackers" were the thinner ones.
When the researchers accounted for a number of other factors – including exercise habits (active teens may need more snacks for energy), time spent in front of the TV or computer, ethnicity and family income – snacking itself remained linked to a lower risk of being overweight or obese.
