USANA NSF Certified

USANA Receives Certification Through NSF’s Certified for Sport Program

SALT LAKE CITY–(BUSINESS WIRE)–March 31, 2008–USANA Health Sciences, Inc. (NASDAQ: USNA) recently received
certification of six of its products through NSF International’s Certified for Sport(TM) program. NSF’s independent
certification helps athletes make educated decisions about the safety of the dietary supplements they choose to take.

USANA’s Essentials™ (Mega Antioxidant and Chelated Mineral), Proflavanol® 90, Procosa® II, Active Calcium™ and
Body Rox™ supplements are now approved to carry NSF’s trusted Certified for Sport™ Mark. USANA also received Good
Manufacturing Practices registration and dietary supplement certification in 2007 through NSF. These are just some of the
third-party findings that help consumers and athletes know USANA products are Nutritionals You Can Trust.
“The Certified for Sport program validates USANA’s guarantee that our nutritional products are complete, balanced, safe
and effective,” said Dr. Tim Wood, USANA Executive Vice President of Research and Development.

“This latest certification,
as with all of our third-party testing, is based on regular product formulas—the same products that USANA customers
take every day. Receiving this certification is just another step toward fulfilling our goal of providing supplements that
everyday consumers and world-class athletes can trust.”

The NSF Certified for Sport program was developed to meet the growing demand of athletes, coaches and all others concerned
about banned substances. The NSF Certified for Sport Mark helps consumers know that products have met NSF’s
stringent independent certification guidelines. Products are tested and facilities are inspected for a wide range of substances
prohibited by the World Anti-Doping Agency, the NFL/NFLPA and MLB/MLBPA. The list includes stimulants, narcotics,
steroids, diuretics, beta-2 agonists, beta blockers, masking agents and other banned substances.

High-quality formulas, a rigorous quality assurance program and third-party certifications have helped USANA earn the
trust of many world-class athletes and athletic organizations, including United States Speedskating, Speed Skating Canada,
USA Luge and the Sony Ericsson WTA Tour. “It is imperative for our athletes to know precisely what they’re putting into
their bodies,” said Stacey Allaster, President of the Sony Ericsson WTA Tour. “With USANA’s guaranteed assurance of the
quality of their products, our athletes can trust that they will be able to attain optimal health and fitness without the fear of
violating the strict WADA code they all adhere to.”

USANA has taken its assurances to athletes one step further through its unique Athlete Guarantee Program. Select athletes
who participate in the program are guaranteed compensation up to $1 million if they should test positive for a substance
banned by WADA as a result of taking USANA® nutritional products.
About NSF

NSF International, an independent, not-for-profit organization, helps protect you by certifying products and writing standards
for food, water, air and consumer goods (www.nsf.org). Founded in 1944, NSF is committed to protecting public
health and safety worldwide. NSF is a World Health Organization Collaborating Centre for Food and Water Safety and
Indoor Environment. Additional services include safety audits for the food and water industries, management systems
registrations delivered through NSF International Strategic Registrations, Ltd., organic certification provided by Quality
Assurance International and education through the NSF Center for Public Health Education.

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