REVOLVING LINE OF CREDIT NOTE

Exhibit 10.40

REVOLVING LINE OF CREDIT NOTE

FOR VALUE RECEIVED, the undersigned NATURAL ALTERNATIVES INTERNATIONAL, INC. (“Borrower”) promises to pay to the order of WELLS FARGO BANK, NATIONAL ASSOCIATION (“Bank”) at its San Diego Regional Commercial Banking Office, 401 B Street, Suite 2201, San Diego, California, or at such other place as the holder hereof may designate, in lawful money of the United States of America and in immediately available funds, the principal sum of Seven Million Five Hundred Thousand Dollars ($7,500,000.00), or so much thereof as may be advanced and be outstanding, with interest thereon, to be computed on each advance from the date of its disbursement as set forth herein.

DEFINITIONS:

As used herein, the following terms shall have the meanings set forth after each, and any other term defined in this Note shall have the meaning set forth at the place defined:

(a) “Business Day” means any day except a Saturday, Sunday or any other day on which commercial banks in California are authorized or required by law to close.

(b) “Daily One Month LIBOR” means, for any day, the rate of interest equal to LIBOR then in effect for delivery for a one (1) month period.

(c) “Fixed Rate Term” means a period commencing on a Business Day and continuing for one (1), three (3) or six (6) months, as designated by Borrower, during which all or a portion of the outstanding principal balance of this Note bears interest determined in relation to LIBOR; provided however, that no Fixed Rate Term may be selected for a principal amount less than One Hundred Thousand Dollars ($100,000.00); and provided further, that no Fixed Rate Term shall extend beyond the scheduled maturity date hereof. If any Fixed Rate Term would end on a day which is not a Business Day, then such Fixed Rate Term shall be extended to the next succeeding Business Day.

(d) “LIBOR” means the rate per annum (rounded upward, if necessary, to the nearest whole 1/8 of 1%) and determined pursuant to the following formula:

LIBOR =                          Base LIBOR                                          

100% - LIBOR Reserve Percentage

(i) “Base LIBOR” means the rate per annum for United States dollar deposits quoted by Bank (A) for the purpose of calculating effective rates of interest for loans making reference to LIBOR, as the Inter-Bank Market Offered Rate, with the understanding that such rate is quoted by Bank for the purpose of calculating effective rates of interest for loans making reference thereto, on the first day of a Fixed Rate Term for delivery of funds on said date for a period of time approximately equal to the number of days in such Fixed Rate Term and in an amount approximately equal to the principal amount to which such Fixed Rate Term applies, or (B) for the purpose of calculating effective rates of interest for loans making reference to the

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Daily One Month LIBOR Rate, as the Inter-Bank Market Offered Rate in effect from time to time for delivery of funds for one (1) month in amounts approximately equal to the principal amount of such loans. Borrower understands and agrees that Bank may base its quotation of the Inter-Bank Market Offered Rate upon such offers or other market indicators of the Inter-Bank Market as Bank in its discretion deems appropriate including, but not limited to, the rate offered for U.S. dollar deposits on the London Inter-Bank Market.

(ii) “LIBOR Reserve Percentage” means the reserve percentage prescribed by the Board of Governors of the Federal Reserve System (or any successor) for “Eurocurrency Liabilities” (as defined in Regulation D of the Federal Reserve Board, as amended), adjusted by Bank for expected changes in such reserve percentage during the applicable term of this Note.

INTEREST:

(a) Interest . The outstanding principal balance of this Note shall bear interest (computed on the basis of a 360-day year, actual days elapsed) either (i) at a fluctuating rate per annum determined by Bank to be two and three-quarters percent (2.75%) above the Daily One Month LIBOR Rate in effect from time to time, or (ii) at a fixed rate per annum determined by Bank to be two and one-half percent (2.50%) above LIBOR in effect on the first day of the applicable Fixed Rate Term. When interest is determined in relation to the Daily One Month LIBOR Rate, each change in the interest rate shall become effective each Business Day that the Bank determines that the Daily One Month LIBOR Rate has changed. Bank is hereby authorized to note the date, principal amount and interest rate applicable thereto and any payments made thereon on Bank’s books and records (either manually or by electronic entry) and/or on any schedule attached to this Note, which notations shall be prima facie evidence of the accuracy of the information noted.

(b) Selection of Interest Rate Options . At any time any portion of this Note bears interest determined in relation to LIBOR for a Fixed Rate Term, it may be continued by Borrower at the end of the Fixed Rate Term applicable thereto so that all or a portion thereof bears interest determined in relation to the Daily One Month LIBOR Rate or to LIBOR for a new Fixed Rate Term designated by Borrower. At any time any portion of this Note bears interest determined in relation to the Daily One Month LIBOR Rate, Borrower may at any time convert all or a portion thereof so that it bears interest determined in relation to LIBOR for a Fixed Rate Term designated by Borrower. At such time as Borrower requests an advance hereunder or wishes to select an interest rate determined in relation to the Daily One Month LIBOR Rate or a Fixed Rate Term for all or a portion of the outstanding principal balance hereof, and at the end of each Fixed Rate Term, Borrower shall give Bank notice specifying: (i) the interest rate option selected by Borrower; (ii) the principal amount subject thereto; and (iii) for each LIBOR selection for a Fixed Rate Term, the length of the applicable Fixed Rate Term. Any such notice may be given by telephone (or such other electronic method as Bank may permit) so long as, with respect to each LIBOR selection for a Fixed Rate Term, (A) if requested by Bank, Borrower provides to Bank written confirmation thereof not later than three (3) Business Days after such notice is given, and (B) such notice is given to Bank prior to 10:00 a.m. on the first day of the Fixed Rate Term, or at a later time during any Business Day if Bank, at its sole option but without obligation to do so, accepts Borrower’s notice and quotes a fixed rate to Borrower. If Borrower does not immediately accept a fixed rate when quoted by Bank, the quoted rate shall expire and any subsequent LIBOR request from Borrower shall be subject to a redetermination by Bank of the applicable fixed rate. If no specific designation of interest is made at the time

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any advance is requested hereunder or at the end of any Fixed Rate Term, Borrower shall be deemed to have made a Daily One Month LIBOR Rate interest selection for such advance or the principal amount to which such Fixed Rate Term applied.

(c) Taxes and Regulatory Costs . Borrower shall pay to Bank immediately upon demand, in addition to any other amounts due or to become due hereunder, any and all (i) withholdings, interest equalization taxes, stamp taxes or other taxes (except income and franchise taxes) imposed by any domestic or foreign governmental authority and related in any manner to LIBOR, and (ii) future, supplemental, emergency or other changes in the LIBOR Reserve Percentage, assessment rates imposed by the Federal Deposit Insurance Corporation, or similar requirements or costs imposed by any domestic or foreign governmental authority or resulting from compliance by Bank with