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New York City's Salt Warning: Useless and Potentially Harmful
By Michelle Minton of CEI.
"You may have heard on the news that New York City is, once again,
on the cutting edge of interfering with consumers and businesses. This
time they’ve decided to mandate that chain restaurants add a warning to
items that are too high in salt. The rule is supposed to be aimed at
informing consumers and helping to reduce hypertension and
cardiovascular risk. However, it will not reduce peoples’ overall sodium consumption and may end up putting them at greater risk for disease.
Unanimously approved by the New York City Board of Health Board of
Health, that notorious government body fond of overstepping its legal
authority (recall the big soda ban?),
the new rule requires chain restaurants in the city to put a symbol—a
salt shaker in a black triangle—next to menu items with more than 2,300
milligrams of sodium. Why 2,300? Because that is the recommended daily
limit the U.S. Department of Agriculture and Centers for Disease Control
and Prevention continue to recommend despite the fact that in 2013 researches at the Institute of Medicine,
at the request of the CDC itself, found “studies on health outcomes are
inconsistent in quality and insufficient in quantity to determine that
sodium intakes below 2,300 mg/day either increase or decrease the risk
of heart disease, stroke, or all-cause mortality in the general U.S.
population.”
Sodium is an essential requirement for the human body. It regulates
blood plasma volume, is used for muscle contractions, nerve
transmissions, and pH balance. It is vital in maintaining fluid balance
and cardiovascular function. And research seems to show that how much
salt we eat is physiologically determined that even extreme interventions do little to alter.
You might think that Americans eat more salt now than ever. In
reality, Americans have been eating the same level of sodium since at
least the 1950s. In 2010, Harvard researchers
analyzed 38 studies, published between 1957 and 2003 and found that
decade after decade, we consumed about 3,700 mgs per day. And it’s a
worldwide trend. In 2013, researchers at the University of California-Davis
looked at urine-extraction information for more than 50,000 people in
45 countries over the span of five decades. They found that across
cultures and time, people ate an eerily similar amount of sodium (with a
few exceptions and daily variation) and they were higher than the
recommended 2,300 mg. But the USDA, CDC, and NYC Board of Health know
better than the rest of the human population.
Even if it were true that we eat too much salt, it is foolhardy to
think that this salt-warning will to do much, if anything, when even
extreme clinical interventions (and three decades of public policy) fail
to alter our sodium intake. For example, during a clinical trial
half of the participants were given a 1,000 mg sodium tablet or a
placebo. Those who got the placebo unconsciously raised their intake by
nearly 1,000 mg through dietary choices, while those on the sodium
tablet actually cut their dietary-sodium consumption to compensate. As Dr. McCarron
(who led many of the sodium studies mentioned here) speculated, if
governments enact policies to reduce the average amount of salt in food,
people might compensate by seeking out saltier foods or by eating more
of everything.
To be sure, there are some individuals with conditions that prompt
their doctor to recommend cutting sodium consumption. On the other hand,
they might be advised to increase their consumption of potassium,
which also reduces blood pressure and for many is a much easier remedy
than trying to fight their unconscious physiological drive to consume
sodium. The bottom line is reducing sodium consumption is not a
universal good—in fact, recent studies
have found that very low sodium diets increase mortality, including
death from CVD, diabetes, and heart failure. Individuals, with their
doctor’s advice, should decide for themselves how little or how much
sodium they should eat—not the NYC Board of Health, not the CDC, and not
the FDA. It might feel good to put a warning on a menu, but that
doesn’t mean the effects will be good."
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