Vim & Vigor - Winter 2013 - University of Virginia - (Page 3)
BY JOSH BARNEY
Is a Low-Salt
Diet Good for
Everyone?
UVA researchers have found a way to
determine your optimal salt intake
W
e've heard it before: Reducing
the amount of salt we consume
can help us avoid high blood pressure and related health problems, right? Not
so fast. Although nonprofit organizations
such as the American Heart Association and
the Institute of Medicine have a one-size-fitsall recommendation on salt intake, University
of Virginia Health System research helps
make it clear that each individual is genetically programmed with a personal salt index;
in other words, an upper and lower limit on
daily salt consumption for good health.
In addition, UVA researchers have developed a test to determine that level and to
identify people who should watch their salt
consumption closely and even those who
should consume more salt.
ARE YOU SALT SENSITIVE?
SOCIAL MEDIA
UVA researcher Robin Felder, PhD, explains:
"The blood pressure of about 25 percent of
the population is sensitive to salt, increasing
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risk for strokes, heart attacks and kidney
failure. Therefore, we developed a simple
test to help the medical community determine an individual's ability to tolerate salt,
and so their sodium chloride [salt] dietary
guidelines can be personalized."
DO YOU NEED MORE SALT?
"Lowering salt intake might not be good
for everyone," Felder adds, "since about
15 percent of individuals demonstrate an
increase in blood pressure on a low-salt
diet-just the opposite of what one would
expect." There are other potentially
harmful effects of low-salt intake, leading to plaques and ultimately blockages
in the arteries.
Felder's research was based on a previous UVA study overseen by Cynthia
Schoeffel, MD, and Robert M. Carey, MD.
Their research team evaluated how the
kidney metabolizes salt and blood pressure in 183 adult volunteers who agreed
to follow a special diet of high salt for one
week and very low salt for another week.
The negative effects of salt appear at the
highest and lowest levels of consumption.
Sodium chloride intakes that are above
and below the range of 2.5-5.8 grams per
day are associated with increased cardiovascular risk. "If an individual consumes
close to their daily personal salt index,"
Felder says, "they are likely to avoid saltrelated illness."
A Simple
Salt Test
A UVA Health System laboratory has developed a test
to determine how much
salt a person should consume each day. The test is
currently only available as
part of UVA research, but
Robin Felder, PhD, says, "if
all goes well, the test will
be available through UVA
physicians by late next
year." It will be an important
test for someone whose
blood pressure may be sensitive to salt. One clue that
sometimes occurs in saltsensitive individuals, Felder
says, is large weight gain
after a high-salt meal that
takes several days to return
to normal.
WI NTER 2013
3
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Table of Contents for the Digital Edition of Vim & Vigor - Winter 2013 - University of Virginia
Vim & Vigor - Winter 2013 - University of Virginia
Contents
Life in Balance
Is a Low-Salt Diet Good for Everyone?
Have You Done Your Monthly Breast Self-Exam Lately?
Waiting for a Heart
Got Excuses?
Managing Your Health with a DIY Tool Kit
Is It the Stress Talking?
The Wonderful World of Greens
Knee-to-Know Basics
On the Cover
Run for Your Life
14 Good-for-You Gifts
Special Delivery
Virtual Health
A Childhood Interrupted by Cancer
Cupcake Wars
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