EXHIBIT A TO AMENDED AND RESTATED
                                                  CREDIT AND GUARANTEE AGREEMENT

WHEN RECORDED, RETURN TO:

Simpson   Thacher  &  Bartlett  
a  partnership   which   includes   
professional corporations 
425 Lexington Avenue 
New York, New York 10017

ATTN: Jeff Feigelson, Esq.

                                                                         [Utah]


                           AMENDMENT TO DEED OF TRUST


                                     between

                        TWIN LABORATORIES, INC., Trustor


                                       and


                   THE CHASE MANHATTAN BANK (FORMERLY KNOWN AS
                    CHEMICAL BANK), as Administrative Agent,
                                   Beneficiary



                          DATED AS OF NOVEMBER 20, 1996



<PAGE>

                           Amendment to Deed of Trust

               This Amendment to Deed of Trust (this "Amendment") dated November
20, 1996 between TWIN LABORATORIES,  INC., a Utah corporation,  whose address is
2120 Smithtown  Avenue,  Ronkonkoma,  New York 11779  ("Trustor")  and THE CHASE
MANHATTAN  BANK  (formerly   known  as  Chemical   Bank),  a  New  York  banking
corporation,  whose address is 270 Park Avenue,  New York, New York 10017, Attn:
Peter Hurd, as Administrative Agent ("Beneficiary"),  for itself and for several
banks and  financial  institutions  from time to time  parties  to that  certain
Amended and Restated Credit and Guarantee  Agreement dated the date hereof among
Twinlab Corporation, a Delaware corporation, Trustor, the said several banks and
other financial  institutions  from time to time parties thereto  (collectively,
the Lenders;  individually,  a "Lender"), The Bank of New York, as Co-Agent, and
Beneficiary  (as the same may be amended,  restated,  supplemented,  modified or
replaced from time to time, the "New Credit Agreement").


                                   Background

A. A Credit and Guarantee  Agreement  dated May 7, 1996 was entered into between
Trustor, TLG Laboratories Holding Corp.,  Beneficiary,  The Bank of New York, as
Documentation  Agent, and the banks and financial  institutions  parties thereto
(the "Existing Credit Agreement").

B. In connection with the Existing Credit  Agreement,  a Deed of Trust dated May
7, 1996 was executed by Trustor in favor of First American Title Company of Utah
for the  benefit  of the  Beneficiary  (the  "Existing  Deed of  Trust"),  which
Existing Deed of Trust was recorded in the Official Records of the Utah Recorder
in Book 3964,  Page 407.  The  Existing  Deed of Trust  encumbers,  among  other
things, the real property described on Schedule A attached hereto.

C. The New Credit  Agreement amends and restates the terms and provisions of the
Existing Credit Agreement.

D. The  agreement  of the  Lenders  to enter into the New  Credit  Agreement  is
conditioned on the execution of this Amendment.


                                    Agreement

The parties hereby agree as follows:

1. All references in the Existing Deed of Trust to the Existing Credit Agreement
shall  be  deemed  to  refer  to the New  Credit  Agreement,  as the same may be
amended, restated, supplemented, modified or replaced from time to time.


<PAGE>

                                                                               2


2.  Except as set forth above, the Existing Mortgage shall remain
unmodified and in full force and effect.

                                                      TWIN LABORATORIES INC.

                                                      By:___________________
                                                         Name:
                                                         Title:

                                                      THE CHASE MANHATTAN BANK

                                                      By:____________________
                                                         Name:
                                                         Title:











































<PAGE>


                                                                              3







                                            UTAH FORM OF ACKNOWLEDGMENT




COUNTY OF                                                     )
                                                              : ss.
STATE OF                                                      )


         The foregoing instrument was acknowledged before me this
day of November, 1996, by                       , as the
    of Twin Labs Inc.




                                                              NOTARY PUBLIC


                                                     Residing at:
(SEAL)

My Commission Expires:


<PAGE>
                                                                               4


                           UTAH FORM OF ACKNOWLEDGMENT




COUNTY OF    )
             : ss.
STATE OF     )


         The  foregoing  instrument  was  acknowledged  before  me  this  day of
November, 1996, by , as the of The Chase Manhattan Bank.




                                                 NOTARY PUBLIC
                                                 ------------------------------


                                             Residing at:
                                                         ----------------------
(SEAL)

My Commission Expires: