REVOLVING NOTE
                                   USANA, Inc.
$15,000,000.00                                         Dated: September 20, 1999
                                                             Seattle, Washington

         USANA, Inc., a Utah corporation  ("Borrower")  unconditionally promises
to pay to the order of Bank of America, N.A. ("Bank"), at its Commercial Banking
office,  on or before  September 1, 2002, in immediately  available  funds,  the
principal sum of Fifteen  Million and No/100 Dollars  ($15,000,000.00),  or such
lesser sum as may be advanced hereunder. Borrower further agrees to pay interest
on the daily unpaid principal  balance,  in arrears on the first Business Day of
each month, beginning October 1, 1999, in accordance with the terms, conditions,
and  definitions  of Exhibit A  attached,  which are  incorporated  herein.  All
interest  accruing  under this Note shall be  calculated  on the basis of actual
number of days  elapsed  over a year of 360 days.  Also  incorporated  herein is
Exhibit  1  attached  hereto,  regarding  prepayment  fees,  applicable  only to
prepayment of LIBOR Rate Loans prior to conclusion of their Interest Period.

         This Note is governed by and shall be construed in accordance  with the
laws of the  State of  Washington.  This  Note is also  governed  by the  Credit
Agreement dated September 20, 1999, between Bank and Borrower (the "Agreement"),
and all terms,  conditions,  and  definitions of the Agreement are  incorporated
herein. This is the "Revolving Note" referred to in the Agreement.

         All advances under this Note, all conversions between the interest rate
options,  and all  payments of  principal  and  interest  may be  reflected on a
schedule or a computer-generated statement which shall become a part hereof. All
unpaid  principal and accrued but unpaid  interest under this Note shall be paid
in full on the  Termination  Date,  or  earlier  pursuant  to the  terms  of the
Agreement.

         Bank is authorized to automatically debit each required  installment of
interest from Borrower's checking account number 68504810 at Bank, or such other
deposit account at Bank as Borrower may authorize in the future.

         If a "Default"  shall  occur as such term is defined in the  Agreement,
interest shall accrue,  at the option of the holder of this Note,  from the date
of Default,  at a floating rate per annum three percent (3%) above the Reference
Rate,  as the Reference  Rate may vary from time to time,  and the entire unpaid
principal amount of this Note, together with all accrued interest,  shall become
immediately due and payable at the option of the holder hereof.

         Advances  under  this  Note may be made by Bank at the oral or  written
request of Gilbert Fuller, Devin Thorpe, or Mitchell Walkington,  any one acting
alone,  who are authorized to request Advances and direct the disposition of any
such  Advances  until  written  notice of the  revocation  of such  authority is
received  by Bank at its  office  indicated  above.  Any such  Advance  shall be
conclusively  presumed to have been made to or for the benefit of Borrower  when
made in accordance with such requests and directions,  or when said advances are
deposited to the credit of an account of Borrower  with Bank,  regardless of the
fact that persons  other than those  authorized  under this  paragraph  may have
authority to draw against such account.

         Borrower  hereby waives  presentment,  demand,  protest,  and notice of
dishonor  hereof.  Each party signing or endorsing  this Note signs as maker and
principal, and not as guarantor, surety, or accommodation party; and is estopped
from asserting any defense based on any capacity other than maker or principal.

                                       1


         ORAL AGREEMENTS OR ORAL COMMITMENTS TO LOAN MONEY, TO EXTEND CREDIT, OR
TO  FORBEAR  FROM  ENFORCING  REPAYMENT  OF A DEBT  ARE  NOT  ENFORCEABLE  UNDER
WASHINGTON LAW.

                                USANA, Inc.




                                By
                                  Gilbert A. Fuller, Senior Vice President & CFO





                                    EXHIBIT A
                               INTEREST PROVISIONS

Article 1: Definitions

         All terms defined below shall have the meaning indicated.

1.1 Adjusted  LIBOR Rate shall mean for any day that per annum rate equal to the
sum of (a) the Margin,  (b) the Assessment Rate, and (c) the quotient of (i) the
LIBOR Rate as determined for such day,  divided by (ii) the Reserve  Adjustment.
The  Adjusted  LIBOR Rate shall  change with any change in the LIBOR Rate on the
first day of each Interest Period and on the effective date of any change in the
Assessment Rate or Reserve Adjustment.

1.2 Agreement  shall mean the Credit  Agreement  dated as of September 20, 1999,
between  Borrower and Bank,  including all amendments  thereto and  restatements
thereof.

1.3 Assessment Rate shall mean as of any day the minimum annual  percentage rate
established by the Federal Deposit Insurance  Corporation (or any successor) for
the assessment due from members of the Bank Insurance Fund (or any successor) in
effect for the assessment  period during which said day occurs based on deposits
maintained at such members' offices located outside of the United States. In the
event of a retroactive  reduction in the Assessment Rate after a commencement of
any Interest  Period,  Bank shall not  retroactively  adjust as to such Interest
Period any interest rate calculated using the Assessment Rate.

1.4      Bank shall mean the holder of the Note.

1.5      Borrower shall mean the maker of the Note.

1.6 Business Day shall mean any day other than a Saturday,  Sunday, or other day
on which commercial banks in Seattle,  Washington, are authorized or required by
law to close.

1.7  Commencement  Date  shall  mean the  first  day of any  Interest  Period as
requested by Borrower.

1.8 Floating Rate shall mean the Reference Rate per annum plus the Margin.

1.9  Floating  Rate Loans  shall mean those  portions of  principal  of the Note
accruing interest at the Floating Rate.

1.10 Interest  Payment Date shall mean (a) the first  Business Day of each month
for Floating  Rate Loans,  (b) the last day of the  Interest  Period as to LIBOR
Rate Loans with Interest  Periods of three months or less,  (c) as to LIBOR Rate
Loans with Interest Periods of more than three months, on the day which is three
months after the Commencement Date and the last day of the Interest Period,  and
(d) the Termination Date.

1.11 Interest Period shall mean the period commencing on the date of any Advance
at or conversion to an Adjusted LIBOR Rate and ending on any date  thereafter as
selected  by  Borrower,  subject  to the  restrictions  of Section  2.3.  If any
Interest  Period  would end on a day which is not a Business  Day,  the Interest
Period shall be extended to the next succeeding Business Day.

1.12 LIBOR Rate shall mean for any  Interest  Period the per annum rate for U.S.
Dollar  deposits  for a period  equal to the  Interest  Period  appearing on the
display designated as "Page 3750" on the Telerate Service (or such other page on
that  service  or  such  other  service   designated  by  the  British  Banker's
Association for the display of that Association's  Interest Settlement Rates for
U.S.  Dollar  deposits) as of 11:00 a.m.,  London time,  on the day which is two
London Banking Days prior to the first day of the Interest  Period.  If there is
no period equal to the Interest  Period on the display,  the LIBOR Rate shall be
determined by  straight-line  interpolation to the nearest month (or week or day
if expressed in weeks or days)  corresponding to the Interest Period between the
two nearest neighboring periods on the display.

1.13 LIBOR  Rate  Loans  shall mean  those  portions  of  principal  of the Note
accruing interest at the Adjusted LIBOR Rate.

1.14 London  Banking Day shall mean any day other than a  Saturday,  Sunday,  or
other day on which  commercial  banks in  London,  England,  are  authorized  or
required by law to close.

1.15     Margin shall have the meaning given in the Agreement.

1.16 Note shall mean the promissory note to which this exhibit is attached.

1.17 Reference Rate shall mean the rate of interest publicly announced from time
to time by Bank as its  "Reference  Rate."  The  Reference  Rate is set based on
various  factors,  including  Bank's costs and desired return,  general economic
conditions, and other factors, and is used as a reference point for pricing some
loans.  Bank may price loans to its customers at, above,  or below the Reference
Rate.  Any change in the  Reference  Rate shall  take  effect at the  opening of
business  on the day  specified  in the public  announcement  of a change in the
Reference Rate.

1.18 Reserve Adjustment shall mean as of any day the remainder of one minus that
percentage (expressed as a decimal) which is the highest of any such percentages
established  by the Board of  Governors  of the Federal  Reserve  System (or any
successor)  for  required  reserves  (including  any  emergency,   marginal,  or
supplemental reserve requirement) regardless of the aggregate amount of deposits
with said member bank and without  benefit of any  possible  credit,  proration,
exemptions,  or offsets for time deposits established at offices of member banks
located outside of the United States or for eurocurrency liabilities, if any.

1.19     Termination Date shall have the meaning given in the Agreement.

Article 2: Interest Rate Options

2.1 Interest  Rates and Payment Date. The Note shall bear interest from the date
of Advance on the unpaid principal balance  outstanding from time to time at the
Floating  Rate or Adjusted  LIBOR Rate as  selected by Borrower  and all accrued
interest shall be payable in arrears on each Interest Payment Date.

2.2 Procedure.  Borrower may, by 11:30 a.m., Pacific time, on any London Banking
Day two London Banking Days before a Commencement  Date, request Bank to give an
Adjusted LIBOR Rate quote for a specified loan amount and Interest Period.  Bank
will then quote to Borrower the available  Adjusted  LIBOR Rate.  Borrower shall
have one hour  from the time of the  quote to elect an  Adjusted  LIBOR  Rate by
giving Bank irrevocable notice of such election.

2.3 Restrictions.  Each Interest Period shall be one, two, three, or six months.
In no event shall an Interest  Period extend beyond the  Termination  Date.  The
minimum amount of a LIBOR Rate Loan shall be $100,000.

2.4  Prepayments.  If  Borrower  prepays all or any portion of a LIBOR Rate Loan
prior to the end of an  Interest  Period,  there shall be due at the time of any
such  prepayment the  Prepayment  Fee,  determined in accordance  with Exhibit 1
attached to the Note.  Floating  Rate Loans may be prepaid on any Business  Day,
without premium or penalty.

2.5  Reversion to Floating.  The Note shall bear  interest at the Floating  Rate
unless an Adjusted LIBOR Rate is  specifically  selected.  At the termination of
any Interest  Period each LIBOR Rate Loan shall  revert to a Floating  Rate Loan
unless Borrower directs otherwise pursuant to Section 2.2.

2.6 Inability to Participate in Market. If Bank in good faith cannot participate
in the  Eurodollar  market for legal or  practical  reasons,  there  shall be no
Adjusted  LIBOR Rate  option.  Bank shall  notify  Borrower of and when it again

                                       1


becomes legal or practical to  participate in the  Eurodollar  market,  at which
time the Adjusted LIBOR Rate option shall resume being an interest rate option.

2.7 Costs. Borrower shall reimburse Bank for all costs, taxes, and expenses, and
defend and hold Bank  harmless  for any  liabilities,  which Bank may incur as a
consequence  of any changes in the cost of  participating  in, or in the laws or
regulations affecting,  the Eurodollar market,  including any additional reserve
requirements,  except to the extent such costs are already  calculated  into the
Adjusted LIBOR Rate. This covenant shall survive the payment of the Note.

2.8  Basis of  Quotes.  Borrower  acknowledges  that  Bank may or may not in any
particular  case actually  match-fund a LIBOR Rate Loan. FDIC  assessments,  and
Federal Reserve Board reserve requirements,  if any are assessed,  will be based
on Bank's best  estimates of its marginal cost for each of these items.  Whether
such  estimates  in fact  represent  the actual cost to Bank for any  particular
dollar or  Eurodollar  deposit or any LIBOR Rate Loan will  depend upon how Bank
actually  chooses to fund the LIBOR Rate Loan.  By electing  an  Adjusted  LIBOR
Rate,  Borrower  waives any right to object to Bank's means of  calculating  the
Adjusted LIBOR Rate quote accepted by Borrower.

1.1




                          Exhibit 1 -- PREPAYMENT FEES

         If the  principal  balance of this note is prepaid in whole or in part,
whether by voluntary prepayment,  operation of law, acceleration or otherwise, a
prepayment fee, in addition to any interest earned,  will be immediately payable
to the holder of this note.

         The amount of the prepayment fee depends on the following:

(1)      The  amount by which  interest  prepayment  reference  rates as defined
         below have  changed  between the time the loan is prepaid and either a)
         the time the loan was made for  fixed  rate  loans,  or b) the time the
         interest rate last changed (repriced) for variable rate loans.
(2) A prepayment fee factor (see  "Prepayment Fee Factor  Schedule" on reverse).
(3) The amount of principal prepaid.

If the proceeds from a CD or time deposit pledged to secure the loan are used to
prepay the loan resulting in payment of an early withdrawal  penalty for the CD,
a prepayment fee will not also be charged under the loan.

       Definition of Prepayment Reference Rate for Variable Rate Loans


The  "Prepayment  Reference  Rate" used to  represent  interest  rate levels for
variable  rate loans shall be the index rate used to determine  the rate on this
loan having  maturities  equivalent  to the  remaining  period to interest  rate
change date  (repricing) of this loan rounded  upward to the nearest month.  The
"Initial  Prepayment  Reference Rate" shall be the Prepayment  Reference Rate at
the time of last repricing and a new Initial Prepayment  Reference Rate shall be
assigned at each subsequent  repricing.  The "Final  Prepayment  Reference Rate"
shall be the Prepayment Reference Rate at the time of prepayment.

           Definition of Prepayment Reference Rate for Fixed Rate Loans


The "Prepayment  Reference Rate" used to represent interest rate levels on fixed
rate loans shall be the bond equivalent yield of the average U.S.  Treasury rate
having  maturities  equivalent to the remaining  period to maturity of this loan
rounded upward to the nearest month.  The "Initial  Prepayment  Reference  Rate"
shall be the Prepayment Reference Rate at the time the loan was made. The "Final
Prepayment  Reference  Rate" shall be the  Prepayment  Reference Rate at time of
prepayment.

The Prepayment Reference Rate shall be interpolated from the yields as displayed
on Page 119 of the Dow Jones Telerate  Service (or such other page or service as
may replace that page or service for the purpose of displaying  rates comparable
to said U.S.  Treasury  rates) on the day the loan was made (Initial  Prepayment
Reference Rate) or the day of prepayment (Final Prepayment Reference Rate).

An Initial Prepayment  Reference Rate of N/A % has been assigned to this loan to
represent interest rate levels at origination.

                          Calculation of Prepayment Fee


If the  Initial  Prepayment  Reference  Rate is less  than or equal to the Final
Prepayment Reference Rate, there is no prepayment fee.

If the Initial  Prepayment  Reference Rate is greater than the Final  Prepayment
Reference Rate, the prepayment fee shall be equal to the difference  between the
Initial  and  Final  Prepayment   Reference  Rates  (expressed  as  a  decimal),
multiplied by the  appropriate  factor from the Prepayment Fee Factor  Schedule,
multiplied by the principal amount of the loan being prepaid.





                      Example of Prepayment Fee Calculation

Variable Rate Loan: A non-amortizing  6-month LIBOR based loan with principal of
$250,000 is fully  prepaid  with 3 months  remaining  until next  interest  rate
change  date  (repricing).  An  Initial  Prepayment  Reference  Rate of 7.0% was
assigned to the loan at last repricing.  The Final Prepayment Reference Rate (as
determined by the 3-month  LIBOR index) is 6.5%.  Rates  therefore  have dropped
0.5% since last repricing and a prepayment fee applies.  A prepayment fee factor
of 0.31 is determined  from Table 3 below and the  prepayment fee is computed as
follows:

       Prepayment Fee = (0.07 -- 0.065) x (0.31) x ($250,000) = $387.50

Fixed Rate Loan:  An  amortizing  loan with  remaining  principal of $250,000 is
fully prepaid with 24 months  remaining  until maturity.  An Initial  Prepayment
Reference  Rate of 9.0% was  assigned  to the loan when the loan was  made.  The
Final  Prepayment  Reference  Rate (as  determined by the current  24-month U.S.
Treasury  rate on Page 119 of Telerate) is 7.5%.  Rates  therefore  have dropped
1.5% since the loan was made and a  prepayment  fee applies.  A  prepayment  fee
factor  of 1.3 is  determined  from  Table 1 below  and  the  prepayment  fee is
computed as follows:

          Prepayment Fee = (0.09 -- 0.075) x (1.3) x ($250,000) = $4,875

                         PREPAYMENT FEE FACTOR SCHEDULE




                         TABLE I: FULLY AMORTIZING LOANS
Proportion of Remaining Principal                      Months Remaining To Maturity/Repricing1
Amount Being Prepaid
- --------------------------------------------------------------------------------------------------------------------
                   0      3       6      9      12      24     36     48      60     84     120     240    360
- --------------------------------------------------------------------------------------------------------------------
                                                                    
90-100%            0      .21     .36    .52    .67     1.3    1.9    2.5     3.1    4.3    5.9     10.3   13.1
60-89%             0      .24     .44    .63    .83     1.6    2.4    3.1     3.9    5.4    7.5     13.2   17.0
30-59%             0      .28     .53    .78    1.02    2.0    3.0    4.0     5.0    7.0    9.9     18.5   24,4
0-29%              0      .31     .63    .92    1.22    2.4    3.7    5.0     6.3    9.0    13.4    28.3   41.8





                 TABLE II: PARTIALLY AMORTIZING (BALLOON) LOANS
Proportion of Remaining Principal                       Months Remaining To Maturity/Repricing1
Amount Being Prepaid
- --------------------------------------------------------------------------------------------------------------------
                         0      3      6      9     12      24     36     48     60     84     120    240    360
- --------------------------------------------------------------------------------------------------------------------
                                                                   
       90-100%           0     .26    .49    .71    .94    1.8     2.7    3.4    4.2    5.6    7.4   11.6    14.0
        60-89%           0     .30    .59    .86   1.15    2.2     3.3    4.3    5.3    7.1    9.4   15.0    18.1
        30-59%           0     .31    .63    .95   1.27    2.6     3.9    5.3    6.6    9.1   12.6   21.2    26.2
        0-29%            0     .31    .63    .95   1.27    2.6     4.0    5.4    7.0   10.2   15.7   33.4    46.0





                 TABLE III: NONAMORTIZING (INTEREST ONLY) LOANS
Proportion of Remaining Principal                       Months Remaining To Maturity/Repricing1
Amount Being Prepaid
- --------------------------------------------------------------------------------------------------------------------
                         0      3      6      9     12      24     36     48     60     84     120    240    360
- --------------------------------------------------------------------------------------------------------------------
                                                                   
        0-100%           0     .31    .61    .91   1.21    2.3     3.4    4.4    5.3    6.9    8.9   13.0    14.8



1  For   the   remaining   period   to   maturity/repricing   between   any  two
maturities/repricings  shown in the above  schedules,  interpolate  between  the
corresponding factors to the closest month.

The  holder  of this note is not  required  to  actually  reinvest  the  prepaid
principal in any U.S.  Government Treasury  Obligations,  or otherwise prove its
actual loss, as a condition to receiving a prepayment fee as calculated above.