USANA Supported Clinical Study Demonstrates Improved Bone Health in Girls

New Study Involving Active Calcium Chewable Offers Promising Results
SALT LAKE CITY--(Business Wire)--
USANA Health Sciences, Inc. (NASDAQ: USNA) announced today that a third-party
clinical study led by Dr. David Greene at Australian Catholic University (ACU
National) found that use of USANA`s Active Calcium Chewable supplement improves
bone health in young girls.

The double-blind, placebo-controlled study involved 20 pairs of identical twin
girls, ages 9-12 years old, who were randomly assigned to receive USANA`s Active
Calcium Chewable or a matching placebo. The results of the study found that
after six months of supplementation, Active Calcium Chewable improved measures
of bone mineral content, bone mineral density, and bone strength in these girls.

"We are delighted with the results of the ACU National study," said Dr. Tim
Wood, USANA`s Executive Vice President of Research and Development. "These
results confirm the findings of a similar 2003 clinical trial conducted at the
University of Utah. The ACU National study design, in which one twin received
Active Calcium Chewable while her sister received the placebo, goes a step
further and factors out genetic influences."

Results of the ACU National study are particularly significant, because young
women accumulate bone mass most rapidly during adolescence, and ideal skeletal
development can only be achieved when dietary intakes of calcium, vitamin D, and
magnesium are optimal during this period. Dr. Greene of ACU National said
maximizing bone during the growing years was essential to offsetting the effects
of osteoporosis in later life.

"It is estimated that only 10 to 25 percent of children and teens get adequate
amounts of calcium and vitamin D," said Dr. Christine Wood. "My own experience
as a pediatrician confirms this when I question my patients about their calcium
intakes. Parents and teens need to understand the potential long-term risks of
chronic calcium and vitamin D deficiency during adolescence. We can`t turn back
the clock as these children age into adults." Dr. Christine Wood is an expert in
nutritional medicine for children and speaks on healthy lifestyles to parents
worldwide. She is also a member of USANA`s Scientific Advisory Council.

Learn more about USANA`s products by visiting our Web site, reading our blog,
becoming a fan on Facebook, or following us on Twitter.

About USANA

USANA Health Sciences develops and manufactures high-quality nutritionals,
personal care, energy and weight management products that are sold directly to
Preferred Customers and Associates throughout the United States, Canada,
Australia, New Zealand, Hong Kong, Japan, Taiwan, South Korea, Singapore,
Malaysia, the Philippines, Mexico, the Netherlands and the United Kingdom.

About ACU National

Australian Catholic University (ACU National) - established as Australia`s only
Catholic, national, publicly funded university - is open to all. The University
empowers its students and staff with a strong sense of social responsibility and
concern for the moral and ethical dimensions of their study and their
professional and personal lives. Please visit www.acu.edu.au for more
information.

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USANA Health Sciences, Inc.
Dan Macuga, 801-954-7280
Vice President of Marketing & Public Relations
Dan.Macuga@us.usana.com

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