Exhibit 99.1

USANA Board Authorizes $10 Million Share Repurchase Plan

    SALT LAKE CITY--(BUSINESS WIRE)--April 22, 2005--USANA Health
Sciences, Inc. (Nasdaq:USNA) today announced that its board of
directors has increased the authorized dollar amount for additional
repurchases of its outstanding shares of common stock from $4.1
million to $10.0 million.
    The share repurchase will be made from time-to-time, in the open
market, through block trades or otherwise, and will be funded with
internally generated cash.
    Prior to this authorization, USANA had approximately $4.1 million
remaining in its share repurchase plan, which was announced in
November 2004. During 2004, the Company repurchased a total of 1.2
million shares for a total investment of $34.9 million or an average
of $29.02 per share.
    USANA had 19,162,528 common shares outstanding as of April 2,
2005.

    About USANA

    USANA develops and manufactures high quality nutritional and
personal care products that are sold directly to Associates and
Preferred Customers throughout the United States, Canada, Australia,
New Zealand, Hong Kong, Japan, Taiwan, South Korea, Singapore, Mexico,
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. 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, and uncertainties
associated with our planned 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.
             Investor Relations Manager
             Riley Timmer, 801-954-7100
             investor.relations@us.usana.com