Could Kids' Salt Intake Affect Their Weight?12/10/12
MONDAY, Dec. 10 (HealthDay News) -- Children who eat a lot of
salty food also tend to down more sugary drinks -- which, in turn,
might be related to their risk of obesity, a new study
The findings raise the possibility that curbing kids' salt
intake could end up benefiting their waistlines, researchers report
in the Dec. 10 online and January print issue of
The study, of nearly 4,300 Australian children and teens, found
that the more salt kids ate each day, the more fluids they drank.
The same was true when the researchers zeroed in on the nearly
two-thirds of kids who drank sugary beverages: For every 390
milligrams (mg) of sodium they got each day, they averaged an extra
0.6 ounces of sugar-sweetened soda, juice or other drinks.
Those liquid calories, in turn, were linked -- albeit weakly --
to the risk of obesity.
Kids who had more than one sugary drink in a day were 26 percent
more likely to be overweight or obese than their peers who avoided
sweetened drinks. That connection, however, weakened once the
researchers factored in exercise habits.
It's not exactly surprising that kids with a taste for salty
foods would also be fans of soda or other sugary drinks, according
to Lona Sandon, an assistant professor of clinical nutrition at the
University of Texas Southwestern Medical Center at Dallas.
But it's not clear that extra sodium actually made kids drink
more sweetened beverages, she pointed out.
"These data don't tell us anything about cause and effect," Sandon said. "We don't know that if we got kids to lower their sodium intake, they'd drink fewer sugar-sweetened beverages."
One of the researchers on the study agreed. But it also can't
hurt to limit your kids' access to high-sodium snacks and sugary
drinks, according to Carley Grimes, a Ph.D. candidate at Deakin
University in Burwood, Australia.
"As a parent, the best choice is to encourage water as a beverage and limit availability to sugary drinks," Grimes said.
As for salty foods, overindulgence can raise blood pressure,
even in kids.
In general, experts recommend that adults and children get no
more than 2,300 mg of sodium each day. Yet a recent government
study of U.S. children and teens found that they averaged almost
3,400 mg of sodium per day.
Americans get most of their sodium not from their kitchen salt
shakers, but from processed foods and restaurant meals. So, Sandon
and Grimes said, it's wise to cut down on those types of foods, and
replace them with fruits, vegetables and other whole foods.
The study included nearly 4,300 participants aged 2 to 16 who
were interviewed (or whose parents were interviewed) about their
diets over the past 24 hours.
Overall, 62 percent had had at least one sugar-sweetened drink.
Those kids averaged over 2,500 mg of sodium a day, and just over 5
percent were obese; of their peers who steered clear of sugary
drinks, just over 3 percent were obese, and the average sodium
intake was a little less than 2,300 mg.
When the researchers looked at obesity risk, they found that
kids who had at least one sugar-sweetened drink per day were 26
percent more likely to be overweight or obese. That was with
factors like family income and overall calorie intake taken into
But then the researchers looked at a subgroup of kids who'd
reported on their exercise habits. And once exercise was factored
in, the obesity/sugary drink link was no longer statistically
significant -- which means it could have been a chance finding.
Still, the researchers noted, the findings suggest that keeping
kids' sodium intake down could end up having some impact on their
Sandon was skeptical. "It's a bit of stretch to say that," she
said. Kids who like their salty snacks may be reaching for those
sweet drinks because they like the taste of sweet drinks, Sandon
explained -- and not because the sodium is making them do it.
"Really, the bottom line is that we need to make healthier diet choices overall," Sandon said.
Kristi King, a spokesperson for the Academy of Nutrition and
Dietetics, agreed that overall diet and lifestyle are what
"We can't necessarily say childhood obesity is salt's fault -- or sugar-sweetened beverages' fault," said King, senior dietician at Texas Children's Hospital in Houston.
But, she added, the study is a "great wake-up call" for parents
to take a look at their children's, and their own, eating
"Children learn by example, so if high-sodium foods and sugar-sweetened beverages are readily available in the house and consumed by the parents on a regular basis, [kids] are going to be more likely to consume those as well," King said.
Learn ways to cut down on sodium from the
U.S. National Heart, Lung, and Blood
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