USANA Health Sciences Board of Directors Forms a Special Committee of
               Independent Directors to Review Take-Private Offer

         Special Committee Retains Legal Advisor to Assist in its Review

    SALT LAKE CITY--(BUSINESS WIRE)--May 20, 2008--USANA Health Sciences, Inc.
(NASDAQ: USNA) today announced that its Board of Directors have formed a Special
Committee of independent directors to evaluate an offer expected to be made by
Gull Holdings, Ltd. and others to acquire all of the outstanding shares of USANA
common stock not already owned by Gull Holdings and the other tender offer
participants at a cash purchase price of $26.00 per share. Gull Holdings and
others indicated their intent to make such an offer on a Schedule TO filed with
the Securities and Exchange Commission (SEC) on May 13, 2008. No offer had been
commenced as of the time of this press release.

    The Special Committee has retained Morrison & Foerster LLP as its legal
advisor to assist in its evaluation of the proposed offer. The Special Committee
is also in the process of identifying and retaining a financial advisor to
assist with its evaluation of the proposed offer. Neither USANA nor the Special
Committee plan to update the market with any further comments relating to the
proposed offer until after the tender offer has been issued and the relevant
evaluation has been performed.

    If a tender offer for USANA's common stock is commenced, shareholders are
urged to read USANA's solicitation/recommendation statement on Schedule 14D-9,
which would be filed with the SEC, because it will contain important
information. Shareholders can obtain a free copy of the
solicitation/recommendation statement and any amendments to that statement, if
and when available, and all other filings by USANA with the SEC at www.sec.gov.

    About USANA

    USANA develops and manufactures high quality nutritional, personal care, 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, Mexico, Malaysia, the Netherlands,
and the United Kingdom. More information on USANA can be found at
http://www.usanahealthsciences.com.

    Safe Harbor

    This press release contains forward-looking statements within the meaning of
Section 27A of the Securities Act and Section 21E of the Securities Exchange
Act, including but not limited to statements regarding the proposed tender offer
and the Company's and the Special Committee's intentions with respect to any
such tender offer. Our actual results could differ materially from those
projected in these forward-looking statements, which involve a number of risks
and uncertainties, including reliance upon our network of independent
Associates, the governmental regulation of our products, manufacturing and
marketing risks, adverse publicity risks, and risks associated with our
international expansion. The contents of this release should be considered in
conjunction with the risk factors, warnings, and cautionary statements that are
contained in our most recent filings with the Securities and Exchange
Commission.

    CONTACT: USANA Health Sciences, Inc.
             Riley Timmer, 801-954-7922 (Investor Relations)
             investor.relations@us.usana.com
             or
             Edelman
             Joe Poulos, 011-44-796-772-3291
             Joseph.poulos@edelman.com