SECOND AMENDMENT TO CREDIT AGREEMENT


         THIS SECOND AMENDMENT TO CREDIT AGREEMENT ("Amendment") is made and
entered into by and between USANA Health Sciences, Inc., a Utah corporation
("Borrower") and Bank of America, N.A., a national banking association ("Bank").

                                    Recitals

         A. Borrower and Bank are parties to that certain Credit Agreement dated
March 26, 2001, as amended by that certain letter agreement dated January 25,
2002, by that certain letter agreement dated May 8, 2002, by that certain First
Amendment to Credit Agreement dated as of April 17, 2002 and by that certain
letter agreement dated July 23, 2002 (as amended or otherwise modified, the
"Credit Agreement") pursuant to which, among other things, Bank made available a
revolving line of credit in the amount of $12,500,000 and a term loan to
Borrower in the amount of $10,000,000.

         B. Borrower has requested that Bank reduce the amount of the revolving
line of credit to $10,000,000 and extend the maturity thereof to September 1,
2004 and to make certain other changes to the Credit Agreement, which Bank has
agreed to do on the terms and conditions herein contained.

         NOW THEREFORE, in consideration of the foregoing, Borrower and Bank
agree as follows:

                                    Agreement

1.       DEFINED  TERMS.  Capitalized terms not otherwise defined herein shall
have the meanings given in theCredit Agreement.

2.       AMENDMENTS TO CREDIT AGREEMENT.  The Loan Agreement is amended as
follows:

                  (a) Amendment to Section 1.6.  Section 1.6 is amended and
         restated to read as follows:

                           1.6   Credit Limit shall mean $10,000,000.

                  (b) Amendment to Section 1.23.  Section 1.23 is amended and
         restated to read as follows:

                           1.23 Termination Date shall mean September 1, 2004,
                  or such earlier date upon which Bank's commitment to make
                  Advances or issue Letters of Credit is terminated pursuant to
                  Subsection 10.2(a).

                  (c) Amendment to Section 8.2.  Section 8.2 is amended and
         restated to read as follows:

                           8.2 Tangible Net Worth. Maintain as of the end of
                  each of Borrower's fiscal quarters, a Tangible Net Worth of
                  not less than the sum of (a) $12,000,000, plus (b) 50% of the
                  cumulative net income of Borrower for all fiscal quarters
                  ended after December 31, 2000, in which Borrower's net income
                  was greater than zero, plus (c) 100% of the amount, if any, by
                  which the shareholders' equity of Borrower has increased since
                  December 31, 2000 as a result of the issuance of capital stock
                  or the conversion of debt securities into capital stock, minus
                  (d) the aggregate amount of Borrower's capital stock
                  purchased, retired, or redeemed by Borrower during the period
                  commencing September 1, 2002 and ending December 31, 2003 up
                  to a maximum amount of $5,000,000 minus (e) the aggregate
                  amount of (i) Borrower's capital stock purchased, retired, or
                  redeemed by Borrower plus (ii) cash dividends paid by Borrower
                  on its capital stock, in each case after December 31, 2003, up
                  to a maximum amount equal to 25% of the cumulative net income
                  of Borrower for all fiscal quarters ended after December 31,
                  2003.

                  (d) Amendment to Section 9.6.  Section 9.6 is amended and
         restated to read as follows:

                           9.6 Capital Structure. Purchase, retire, or redeem
                  any of its capital stock or otherwise effect any change in
                  Borrower's capital structure, except that (a) at any time
                  during the period commencing September 1, 2002 and ending
                  December 31, 2003, Borrower may purchase, retire, or redeem
                  its capital stock in an aggregate amount not to exceed
                  $5,000,000 and (b) at any time after December 31, 2003,
                  Borrower may purchase, retire, or redeem its capital stock in
                  an aggregate amount not to exceed the sum of (i) 25% of the
                  cumulative net income of Borrower for all fiscal quarters
                  ended after December 31, 2003 minus (ii) the cumulative amount
                  of cash dividends paid by Borrower on its capital stock after
                  December 31, 2003.

                  (e) Amendment to Section 9.7.  Section 9.7 is amended and
         restated to read as follows:

                           9.7 Dividends. Declare or pay any dividend on any
                  class of Borrower's capital stock, except dividends payable in
                  the form of its capital stock, except that at any time after
                  December 31, 2003, Borrower may declare and pay cash dividends
                  on its capital stock in an aggregate amount not to exceed the
                  sum of (i) 25% of the cumulative net income of Borrower for
                  all fiscal quarters ended after December 31, 2003 minus (ii)
                  the cumulative amount of Borrower's capital stock purchased,
                  retired, or redeemed by Borrower after December 31, 2003.

3.       CONDITIONS TO EFFECTIVENESS.  Notwithstanding  anything  contained
herein to the contrary,  this Amendment shall not become effective until each of
the following conditions is fully and simultaneously satisfied:

                  (a) Delivery of Amendment.  Borrower and Lender shall have
         executed and  delivered  counterparts of this Amendment to each other;

                  (b) Corporate  Authority.  Lender shall have received  such
         evidence of corporate  authority and action as Lender  shall  request
         demonstrating  that the  execution,  delivery and  performance  of this
         Amendment has been duly authorized by Borrower;

                  (c) Amendment  Fee.  Lender  shall have  received  payment of
         an  amendment  fee in the amount of $15,000, which fee shall be deemed
         fully earned when due and non-refundable when paid;

                  (d) Representations True; No Default. The representations of
         Borrower as set forth in Article 7 of the Credit Agreement shall be
         true on and as of the date of this Amendment with the same force and
         effect as if made on and as of this date. No Event of Default and no
         event which, with notice or lapse of time or both, would constitute an
         Event of Default, shall have occurred and be continuing or will occur
         as a result of the execution of this Amendment; and

                  (e) Other  Documents.  Lender  shall  have  received  such
         other documents, instruments, and undertakings as Lender may reasonably
         request.

4. REPRESENTATIONS AND WARRANTIES. Borrower hereby represents and warrants to
Lender that each of the representations and warranties set forth in Article 7 of
the Credit Agreement is true and correct in each case as if made on and as of
the date of this Amendment and Borrower expressly agrees that it shall be an
additional Event of Default under the Credit Agreement if any representation or
warranty made hereunder shall prove to have been incorrect in any material
respect when made.

5.       NO FURTHER  AMENDMENT.  Except as expressly modified by this Agreement,
the Credit Agreement and the other Loan Documents shall remain unmodified and in
full force and effect and the parties hereby ratify their respective obligations
thereunder.


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6.       RESERVATION OF RIGHTS.  Borrower  acknowledges  and agrees that the
execution and delivery by Bank of this Agreement shall not be deemed to create a
course of  dealing or  otherwise  obligate  Bank to  forbear or execute  similar
amendments under the same or similar circumstances in the future.

7.       MISCELLANEOUS.

                  (a) This Agreement comprises the entire agreement of the
         parties with respect to the subject matter hereof and supersedes all
         prior oral or written agreements, representations or commitments.

                  (b)      This  Agreement  may be  executed  in any  number of
         counterparts, all of which taken together shall constitute one and the
         same Agreement.

                  (c) This Agreement and the rights and obligations of the
         parties hereto shall be construed and interpreted in accordance with
         the internal laws of the State of Washington.

         EXECUTED AND DELIVERED by the duly authorized officers of the parties
as of the date first above written.

         Dated as of August 21, 2002.

Borrower:                             Bank:

USANA HEALTH SCIENCES, INC.           BANK OF AMERICA, N.A.



By /s/ Gilbert A. Fuller              By /s/ Mark N. Crawford
   -------------------------------       -------------------------------------
   Gilbert A. Fuller, SVP & CFO          Mark N. Crawford, Senior Vice President




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