SECURITIES AND EXCHANGE COMMISSION
                        Washington, D.C. 20549

                        -----------------------


                Post-Effective Amendment No. 1 [F1]  to

                               FORM S-8
                        Registration Statement
                                 Under
                       The Securities Act of 1933



            NATIONAL HEALTH LABORATORIES HOLDINGS INC. [F2]    
        (Exact name of registrant as specified in its charter)


                             
               Delaware                       13-3757370      
     (State or other jurisdiction          (I.R.S. Employer
          of incorporation or           Identification Number)
             organization)

                         4225 Executive Square
                               Suite 805
                       La Jolla, California  92037           
         (Address of principal executive offices and zip code)

               NATIONAL HEALTH LABORATORIES INCORPORATED
                        1988 STOCK OPTION PLAN
                       (Full title of the plan)

                        James G. Richmond, Esq.
                         4225 Executive Square
                               Suite 805
                      La Jolla, California 92037
                             (619) 657-9382
        (Name, address and telephone number of agent for service)



     [FN]

          [F1] Pursuant to Rule 429, this Post-Effective
     Amendment No. 1 constitutes an amendment to previously filed
     Registration Statements No. 33-29182 and 33-43006 of
     National Health Laboratories Incorporated.

          [F2] National Health Laboratories Holdings Inc. is the
     successor registrant to National Health Laboratories
     Incorporated pursuant to a holding company reorganization
     effected as of June 7, 1994.  The reorganization was
     effected pursuant to a Registration Statement on Form S-4
     (Registration No. 33-52655).


     2



                           Explanatory Note

               On June 9, 1989 and September 26, 1991, the
     Registration Statements on Form S-8 (Registration No. 33-
     29182 and Registration No. 33-43006, respectively) (as
     amended, collectively, the "S-8 Registration Statement") of
     National Health Laboratories Incorporated ("NHL") became
     effective under the Securities Act of 1933, as amended (the
     "Securities Act").  The S-8 Registration Statement was filed
     in connection with the offering by NHL of its common stock,
     par value $.01 per share ("NHL Common Stock"), pursuant to
     NHL's 1988 Stock Option Plan (the "1988 Plan").  

               On April 25, 1994, the Registration Statement on
     Form S-4 (Registration No. 33-52655) (as amended, the "S-4
     Registration Statement") of National Health Laboratories
     Holdings Inc. ("Holdings") was declared effective under the
     Securities Act.  The S-4 Registration Statement was filed in
     connection with the offering by Holdings of shares of its
     common stock, par value $.01 per share ("Holdings Common
     Stock"), in exchange for shares of NHL Common Stock in
     accordance with a proposed corporate merger and
     reorganization whereby NHL became the wholly owned indirect
     subsidiary of Holdings and Holdings became the indirect
     parent holding company of NHL.  

               As a result of the consummation of the merger and
     reorganization described in the S-4 Registration Statement,
     the terms of the 1988 Plan were adjusted to provide for the
     offering of Holdings Common Stock upon exercise of the
     options from time to time in accordance with the 1988 Plan. 
     Pursuant to the procedure approved by the Staff of the
     Securities and Exchange Commission (the "Commission") in
     published no-action letters, Holdings is filing this Post-
     Effective Amendment to the S-8 Registration Statement as a
     successor issuer of NHL to evidence its obligation under the
     Securities Act with respect to the 1988 Plan.



     3



                                PART II

          INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

     Item 3.   Incorporation of Documents by Reference.

               The following documents filed with the Commission
     are incorporated herein by reference:

               a.   NHL's Annual Report on Form 10-K for the
                    fiscal year ended December 31, 1993;

               b.   NHL's Quarterly Report on Form 10-Q for the
                    fiscal quarter ended March 31, 1994; and

               c.   Holdings' Current Report on Form 8-K dated
                    July 8, 1994.

               d.   The description of the Holdings Common Stock
                    contained under the Heading "Description of
                    Capital Stock" in the Proxy
                    Statement/Prospectus included in the S-4
                    Registration Statement.

               All documents subsequently filed by Holdings
     pursuant to Section 13, 14 or 15(d) of the Securities
     Exchange Act of 1934, as amended (the "Exchange Act"), prior
     to the filing of a post-effective amendment which indicates
     that all securities offered have been sold or which
     deregisters all securities then remaining unsold, shall be
     deemed to be incorporated herein by reference and to be a
     part hereof from the date of filing of such documents.

     Item 4.   Description of Securities.

               Not Applicable.

     Item 5.   Interests of Named Experts and Counsel.

               Not Applicable.

     Item 6.   Indemnification of Directors and Officers.

               As authorized by Section 145 of the General
     Corporation Law of Delaware (the "Delaware Corporation
     Law"), each director and officer of NHL or Holdings may be
     indemnified by NHL or Holdings, respectively, against
     expenses (including attorney's fees, judgments, fines and
     amounts paid in settlement) actually and reasonably incurred
     in connection with the defense or settlement of any threat-
     ened, pending or completed legal proceedings in which he is
     involved by reason of the fact that he is or was a director
     or officer of NHL or Holdings; provided that he acted in
     good faith and in a manner that he reasonably believed to be


     4



     in or not opposed to the best interest of NHL or Holdings,
     as applicable, and, with respect to any criminal action or
     proceeding, that he had no reasonable cause to believe that
     his conduct was unlawful.  If the legal proceeding, however,
     is by or in the right of NHL or Holdings, the director or
     officer may not be indemnified in respect of any claim,
     issue or matter as to which he shall have been adjudged to
     be liable for negligence or misconduct in the performance of
     his duty to NHL or Holdings, as the case may be, unless a
     court determines otherwise.

               Article Fifth of the Restated Certificate of
     Incorporation of NHL and Article Sixth of the Certificate of
     Incorporation of Holdings provides that no director of NHL
     or Holdings shall be personally liable to NHL or Holdings,
     respectively, or their respective stockholders for monetary
     damages for any breach of his fiduciary duty as a director; 
     provided, however, that such clause shall not apply to any
     liability of a director (i) for any breach of such
     director's duty of loyalty to NHL or Holdings, as the case
     may be, or their respective stockholders, (ii) for acts or
     omissions not in good faith or which involve intentional
     misconduct or a knowing violation of law, (iii) pursuant to
     Section 174 of the Delaware Corporation Law or (iv) for any
     transaction from which the director derived an improper
     personal benefit.  In addition, Article Sixth of the
     Restated Certificate of Incorporation and Article VII of the
     amended By-laws of NHL and Article VII of the By-laws of
     Holdings authorize NHL and Holdings, respectively, to
     indemnify any person entitled to be indemnified by it under
     law to the fullest extent permitted by law.  

     Item 7.   Exemption from Registration Claimed.
               Not Applicable.  

     Item 8.   Exhibits

               4.1       Form of National Health Laboratories
                         Incorporated 1988 Stock Option Plan
                         (incorporated herein by reference to
                         NHL's Registration Statement on Form S-1
                         (Registration No. 33-21707) filed with
                         the Commission on May 5, 1988 (the
                         "Form S-1")).

               4.2       Form of Stock Option Agreement
                         (incorporated herein by reference to the
                         Form S-1).

               23        Consent of KPMG Peat Marwick.

               24        Powers of Attorney.



     5



     Item 9.   Undertakings.

               Holdings hereby undertakes:  

               1.  To file, during any period in which offers or
     sales are being made, a post-effective amendment to this
     registration statement to include any material information
     with respect to the plan of distribution not previously
     disclosed in the registration statement or any material
     change to such information in the registration statement.  

               2.  That, for the purpose of determining any
     liability under the Securities Act, each such post-effective
     amendment shall be deemed to be a new registration statement
     relating to the securities offered therein, and the offering
     of such securities at the time shall be deemed to be the
     initial bona fide offering thereof.

               3.  To remove from registration by means of a
     post-effective amendment any of the securities being 
     registered which remain unsold at the termination of the
     offering.

               4.  That, for purposes of determining any
     liability under the Securities Act, each filing of the
     registrant's annual report pursuant to Section 13(a) or
     Section 15(d) of the Exchange Act that is incorporated by
     reference in the registration statement shall be deemed to
     be a new registration statement relating to the securities
     offered therein, and the offering of such securities at that
     time shall be deemed to be the initial bona fide offering
     thereof.

               5.  To deliver or cause to be delivered with the
     prospectus, to each person to whom the prospectus is sent or
     given, the latest annual report to security holders that is
     incorporated by reference in the prospectus and furnished
     pursuant to and meeting the requirements of Rule 14a-3 or
     Rule 14c-3 under the Exchange Act; and, where interim
     financial information required to be presented by Article 3
     of Regulation S-X is not set forth in the prospectus, to
     deliver, or cause to be delivered to each person to whom the
     prospectus is sent or given, the latest quarterly report
     that is specifically incorporated by reference in the
     prospectus to provide such interim financial information.

               Insofar as indemnification for liabilities arising
     under the Securities Act may be permitted to directors,
     officers and controlling persons of the registrant pursuant
     to the foregoing provisions, or otherwise, the registrant
     has been advised that in the opinion of the Commission such
     indemnification is against public policy as expressed in the
     Securities Act and is, therefore, unenforceable.  In the
     event that a claim for indemnification against such



     6



     liabilities (other than the payment by the registrant of
     expenses incurred or paid by a director, officer or
     controlling person of the registrant in the successful
     defense of any action, suit or proceeding) is asserted by
     such director, officer or controlling person in connection
     with the securities being registered, the registrant will,
     unless in the opinion of its counsel the matter has been
     settled by controlling precedent, submit to a court of
     appropriate jurisdiction the question whether such
     indemnification by it is against public policy as expressed
     in the Securities Act and will be governed by the final
     adjudication of such issue.


     7



                               SIGNATURE

               Pursuant to the requirements of the Securities Act
     of 1933, the registrant certifies that it has reasonable
     grounds to believe that it meets all the requirements for
     filing on Form S-8 and has duly caused this post-effective
     amendment to the registration statement to be signed on its
     behalf by the undersigned, thereunto duly authorized, in the
     City of La Jolla, the State of California, on this 12th day
     of August, 1994.

                              NATIONAL HEALTH LABORATORIES
                              HOLDINGS INC.,
                                by /s/ David C. Flaugh
                                  ------------------------------
                                  Name:  David C. Flaugh
                                  Title: Senior Executive Vice
                                         President, Chief  
                                         Operating Officer and
                                         Acting Chief Financial
                                         Officer

               Pursuant to the requirements of the Securities Act
     of 1933, this Registration Statement has been signed by or
     on behalf of the following persons in the capacities and on
     the dates indicated:


           Signature           Title               Date


                *
     -----------------------   Chairman of the    August 12, 1994
        Ronald O. Perelman      Board and Director

                *
     -----------------------   President, Chief   August 12, 1994
          James R. Maher       Executive Officer
                               and Director

     /s/ David C. Flaugh       Senior Executive   August 12, 1994
     -----------------------    Vice President,
         David C. Flaugh        Chief Operating
                                Officer and Acting
                                Chief Financial
                                Officer (Principal
                                Financial and
                                Accounting Officer)
                *
     -----------------------   Director           August 12, 1994
       Saul J. Farber, M.D.


     8




                *
     ------------------------  Director      August 12, 1994
         Howard Gittis 

                *
     ------------------------  Director      August 12, 1994
       Ann Dibble Jordan

                *
     ------------------------  Director      August 12, 1994
         David J. Mahoney
                *
     ------------------------  Director      August 12, 1994
        Paul A. Marks, M.D.

                *
     ------------------------  Director      August 12, 1994
       Linda Gosden Robinson

                *
     -----------------------   Director      August 12, 1994
      Samuel O. Thier, M.D.


     *By: /s/ David S. Flaugh
          -------------------
           David C. Flaugh
           Attorney-in-Fact
           August 12, 1994


     9



                             EXHIBIT INDEX

     Exhibit                                               Page

     4.1            Form of National Health Laboratories
                    Incorporated 1988 Stock Option Plan
                    (incorporated herein by reference to
                    NHL's Registration Statement on
                    Form S-1 (Registration No. 33-21707)
                    filed with the Commission on May 5,
                    1988 (the "Form S-1")).

     4.2            Form of Stock Option Agreement
                    (incorporated herein by reference to
                    the Form S-1).

     23             Consent of KPMG Peat Marwick.

     24             Powers of Attorney.


 


                                                       EXHIBIT 23



                            [Letterhead of]

                           KPMG PEAT MARWICK




                     Independent Auditors' Consent



     The Board of Directors
     National Health Laboratories Holdings Inc.:


     We consent to incorporation by reference in the post-
     effective amendment No. 1 to registration statement (No. 33-
     29182 and No. 33-43006) on Form S-8 of National Health
     Laboratories Incorporated of our report dated February 10,
     1994, relating to the consolidated balance sheets of
     National Health Laboratories Incorporated and subsidiaries
     as of December 31, 1993 and 1992, and the related
     consolidated statements of earnings, retained earnings, and
     cash flows for each of the years in the three-year period
     ended December 31, 1993, and related schedule, which report
     appears in the December 31, 1993, annual report on Form 10-K
     of National Health Laboratories Incorporated.


                                             /s/KPMG Peat Marwick


     San Diego, California
     August 8, 1994 


 


                                                       EXHIBIT 24



                           POWER OF ATTORNEY


               KNOWN ALL MEN BY THESE PRESENTS, that the
     undersigned hereby constitutes and appoints each of David C.
     Flaugh, Glenn P. Dickes and Joram C. Salig or any of them,
     each acting alone, his true and lawful attorney-in-fact and
     agent, with full power of substitution, for him and in his
     name, place and stead, in any and all capacities, in
     connection with the National Health Laboratories Holdings
     Inc. Registration Statement on Form S-8 under the Securities
     Act of 1933, as amended, including, without limiting the
     generality of the foregoing, to sign the Registration
     Statement in the name and on behalf of the Corporation or on
     behalf of the undersigned as a director or officer of the
     Corporation, and any amendments (including post-effective
     amendments) to the Registration Statement and any
     instrument, contract, document or other writing, of or in
     connection with the Registration Statement or amendments
     thereto, and to file the same, with all exhibits thereto,
     and other documents in connection therewith, including this
     power of attorney, with the Securities and Exchange
     Commission and any applicable securities exchange or
     securities self-regulatory body, granting unto said
     attorneys-in-fact and agents, each acting alone, full power
     and authority to do and perform each and every act and thing
     requisite and necessary to be done in and about the
     premises, as fully to all intents and purposes as he might
     or could do in person, hereby ratifying and confirming all
     that said attorneys-in-fact and agents, each acting alone,
     or his substitute or substitutes, may lawfully do or cause
     to be done by virtue hereof.

               IN WITNESS WHEREOF, the undersigned has signed
     these presents this 12th day of August 1994.



                                   \s\Ronald O. Perelman
                                   -----------------------------
                                   RONALD O. PERELMAN



     2



                           POWER OF ATTORNEY


               KNOWN ALL MEN BY THESE PRESENTS, that the
     undersigned hereby constitutes and appoints each of David C.
     Flaugh, Glenn P. Dickes and Joram C. Salig or any of them,
     each acting alone, his true and lawful attorney-in-fact and
     agent, with full power of substitution, for him and in his
     name, place and stead, in any and all capacities, in
     connection with the National Health Laboratories Holdings
     Inc. Registration Statement on Form S-8 under the Securities
     Act of 1933, as amended, including, without limiting the
     generality of the foregoing, to sign the Registration
     Statement in the name and on behalf of the Corporation or on
     behalf of the undersigned as a director or officer of the
     Corporation, and any amendments (including post-effective
     amendments) to the Registration Statement and any
     instrument, contract, document or other writing, of or in
     connection with the Registration Statement or amendments
     thereto, and to file the same, with all exhibits thereto,
     and other documents in connection therewith, including this
     power of attorney, with the Securities and Exchange
     Commission and any applicable securities exchange or
     securities self-regulatory body, granting unto said
     attorneys-in-fact and agents, each acting alone, full power
     and authority to do and perform each and every act and thing
     requisite and necessary to be done in and about the
     premises, as fully to all intents and purposes as he might
     or could do in person, hereby ratifying and confirming all
     that said attorneys-in-fact and agents, each acting alone,
     or his substitute or substitutes, may lawfully do or cause
     to be done by virtue hereof.

               IN WITNESS WHEREOF, the undersigned has signed
     these presents this 21st day of July 1994.



                                   \s\Saul J. Farber, M.D.
                                   ------------------------------
                                   SAUL J. FARBER, M.D.



     3



                           POWER OF ATTORNEY


               KNOWN ALL MEN BY THESE PRESENTS, that the
     undersigned hereby constitutes and appoints each of David C.
     Flaugh, Glenn P. Dickes and Joram C. Salig or any of them,
     each acting alone, his true and lawful attorney-in-fact and
     agent, with full power of substitution, for him and in his
     name, place and stead, in any and all capacities, in
     connection with the National Health Laboratories Holdings
     Inc. Registration Statement on Form S-8 under the Securities
     Act of 1933, as amended, including, without limiting the
     generality of the foregoing, to sign the Registration
     Statement in the name and on behalf of the Corporation or on
     behalf of the undersigned as a director or officer of the
     Corporation, and any amendments (including post-effective
     amendments) to the Registration Statement and any
     instrument, contract, document or other writing, of or in
     connection with the Registration Statement or amendments
     thereto, and to file the same, with all exhibits thereto,
     and other documents in connection therewith, including this
     power of attorney, with the Securities and Exchange
     Commission and any applicable securities exchange or
     securities self-regulatory body, granting unto said
     attorneys-in-fact and agents, each acting alone, full power
     and authority to do and perform each and every act and thing
     requisite and necessary to be done in and about the
     premises, as fully to all intents and purposes as he might
     or could do in person, hereby ratifying and confirming all
     that said attorneys-in-fact and agents, each acting alone,
     or his substitute or substitutes, may lawfully do or cause
     to be done by virtue hereof.

               IN WITNESS WHEREOF, the undersigned has signed
     these presents this 12th day of August 1994.



                                   \s\Howard Gittis
                                   ------------------------------
                                   HOWARD GITTIS



     4



                           POWER OF ATTORNEY


               KNOWN ALL MEN BY THESE PRESENTS, that the
     undersigned hereby constitutes and appoints each of David C.
     Flaugh, Glenn P. Dickes and Joram C. Salig or any of them,
     each acting alone, his true and lawful attorney-in-fact and
     agent, with full power of substitution, for him and in his
     name, place and stead, in any and all capacities, in
     connection with the National Health Laboratories Holdings
     Inc. Registration Statement on Form S-8 under the Securities
     Act of 1933, as amended, including, without limiting the
     generality of the foregoing, to sign the Registration
     Statement in the name and on behalf of the Corporation or on
     behalf of the undersigned as a director or officer of the
     Corporation, and any amendments (including post-effective
     amendments) to the Registration Statement and any
     instrument, contract, document or other writing, of or in
     connection with the Registration Statement or amendments
     thereto, and to file the same, with all exhibits thereto,
     and other documents in connection therewith, including this
     power of attorney, with the Securities and Exchange
     Commission and any applicable securities exchange or
     securities self-regulatory body, granting unto said
     attorneys-in-fact and agents, each acting alone, full power
     and authority to do and perform each and every act and thing
     requisite and necessary to be done in and about the
     premises, as fully to all intents and purposes as he might
     or could do in person, hereby ratifying and confirming all
     that said attorneys-in-fact and agents, each acting alone,
     or his substitute or substitutes, may lawfully do or cause
     to be done by virtue hereof.

               IN WITNESS WHEREOF, the undersigned has signed
     these presents this 12th day of August 1994.



                                   \s\Ann Dibble Jordan
                                   ------------------------------
                                   ANN DIBBLE JORDAN



     5



                           POWER OF ATTORNEY


               KNOWN ALL MEN BY THESE PRESENTS, that the
     undersigned hereby constitutes and appoints each of David C.
     Flaugh, Glenn P. Dickes and Joram C. Salig or any of them,
     each acting alone, his true and lawful attorney-in-fact and
     agent, with full power of substitution, for him and in his
     name, place and stead, in any and all capacities, in
     connection with the National Health Laboratories Holdings
     Inc. Registration Statement on Form S-8 under the Securities
     Act of 1933, as amended, including, without limiting the
     generality of the foregoing, to sign the Registration
     Statement in the name and on behalf of the Corporation or on
     behalf of the undersigned as a director or officer of the
     Corporation, and any amendments (including post-effective
     amendments) to the Registration Statement and any
     instrument, contract, document or other writing, of or in
     connection with the Registration Statement or amendments
     thereto, and to file the same, with all exhibits thereto,
     and other documents in connection therewith, including this
     power of attorney, with the Securities and Exchange
     Commission and any applicable securities exchange or
     securities self-regulatory body, granting unto said
     attorneys-in-fact and agents, each acting alone, full power
     and authority to do and perform each and every act and thing
     requisite and necessary to be done in and about the
     premises, as fully to all intents and purposes as he might
     or could do in person, hereby ratifying and confirming all
     that said attorneys-in-fact and agents, each acting alone,
     or his substitute or substitutes, may lawfully do or cause
     to be done by virtue hereof.

               IN WITNESS WHEREOF, the undersigned has signed
     these presents this 12th day of August 1994.



                                   \s\James R. Maher
                                   ------------------------------
                                   JAMES R. MAHER



     6



                           POWER OF ATTORNEY


               KNOWN ALL MEN BY THESE PRESENTS, that the
     undersigned hereby constitutes and appoints each of David C.
     Flaugh, Glenn P. Dickes and Joram C. Salig or any of them,
     each acting alone, his true and lawful attorney-in-fact and
     agent, with full power of substitution, for him and in his
     name, place and stead, in any and all capacities, in
     connection with the National Health Laboratories Holdings
     Inc. Registration Statement on Form S-8 under the Securities
     Act of 1933, as amended, including, without limiting the
     generality of the foregoing, to sign the Registration
     Statement in the name and on behalf of the Corporation or on
     behalf of the undersigned as a director or officer of the
     Corporation, and any amendments (including post-effective
     amendments) to the Registration Statement and any
     instrument, contract, document or other writing, of or in
     connection with the Registration Statement or amendments
     thereto, and to file the same, with all exhibits thereto,
     and other documents in connection therewith, including this
     power of attorney, with the Securities and Exchange
     Commission and any applicable securities exchange or
     securities self-regulatory body, granting unto said
     attorneys-in-fact and agents, each acting alone, full power
     and authority to do and perform each and every act and thing
     requisite and necessary to be done in and about the
     premises, as fully to all intents and purposes as he might
     or could do in person, hereby ratifying and confirming all
     that said attorneys-in-fact and agents, each acting alone,
     or his substitute or substitutes, may lawfully do or cause
     to be done by virtue hereof.

               IN WITNESS WHEREOF, the undersigned has signed
     these presents this 28th day of July 1994.



                                   \s\David J. Mahoney
                                   ------------------------------
                                   DAVID J. MAHONEY



     7



                           POWER OF ATTORNEY


               KNOWN ALL MEN BY THESE PRESENTS, that the
     undersigned hereby constitutes and appoints each of David C.
     Flaugh, Glenn P. Dickes and Joram C. Salig or any of them,
     each acting alone, his true and lawful attorney-in-fact and
     agent, with full power of substitution, for him and in his
     name, place and stead, in any and all capacities, in
     connection with the National Health Laboratories Holdings
     Inc. Registration Statement on Form S-8 under the Securities
     Act of 1933, as amended, including, without limiting the
     generality of the foregoing, to sign the Registration
     Statement in the name and on behalf of the Corporation or on
     behalf of the undersigned as a director or officer of the
     Corporation, and any amendments (including post-effective
     amendments) to the Registration Statement and any
     instrument, contract, document or other writing, of or in
     connection with the Registration Statement or amendments
     thereto, and to file the same, with all exhibits thereto,
     and other documents in connection therewith, including this
     power of attorney, with the Securities and Exchange
     Commission and any applicable securities exchange or
     securities self-regulatory body, granting unto said
     attorneys-in-fact and agents, each acting alone, full power
     and authority to do and perform each and every act and thing
     requisite and necessary to be done in and about the
     premises, as fully to all intents and purposes as he might
     or could do in person, hereby ratifying and confirming all
     that said attorneys-in-fact and agents, each acting alone,
     or his substitute or substitutes, may lawfully do or cause
     to be done by virtue hereof.

               IN WITNESS WHEREOF, the undersigned has signed
     these presents this 21st day of July 1994.



                                   \s\Paul A. Marks
                                   ------------------------------
                                   PAUL A. MARKS



     8



                           POWER OF ATTORNEY


               KNOWN ALL MEN BY THESE PRESENTS, that the
     undersigned hereby constitutes and appoints each of David C.
     Flaugh, Glenn P. Dickes and Joram C. Salig or any of them,
     each acting alone, his true and lawful attorney-in-fact and
     agent, with full power of substitution, for him and in his
     name, place and stead, in any and all capacities, in
     connection with the National Health Laboratories Holdings
     Inc. Registration Statement on Form S-8 under the Securities
     Act of 1933, as amended, including, without limiting the
     generality of the foregoing, to sign the Registration
     Statement in the name and on behalf of the Corporation or on
     behalf of the undersigned as a director or officer of the
     Corporation, and any amendments (including post-effective
     amendments) to the Registration Statement and any
     instrument, contract, document or other writing, of or in
     connection with the Registration Statement or amendments
     thereto, and to file the same, with all exhibits thereto,
     and other documents in connection therewith, including this
     power of attorney, with the Securities and Exchange
     Commission and any applicable securities exchange or
     securities self-regulatory body, granting unto said
     attorneys-in-fact and agents, each acting alone, full power
     and authority to do and perform each and every act and thing
     requisite and necessary to be done in and about the
     premises, as fully to all intents and purposes as he might
     or could do in person, hereby ratifying and confirming all
     that said attorneys-in-fact and agents, each acting alone,
     or his substitute or substitutes, may lawfully do or cause
     to be done by virtue hereof.

               IN WITNESS WHEREOF, the undersigned has signed
     these presents this 12th day of August 1994.



                                   \s\Linda Gosden Robinson
                                   ------------------------------
                                   LINDA GOSDEN ROBINSON



     9



                           POWER OF ATTORNEY


               KNOWN ALL MEN BY THESE PRESENTS, that the
     undersigned hereby constitutes and appoints each of David C.
     Flaugh, Glenn P. Dickes and Joram C. Salig or any of them,
     each acting alone, his true and lawful attorney-in-fact and
     agent, with full power of substitution, for him and in his
     name, place and stead, in any and all capacities, in
     connection with the National Health Laboratories Holdings
     Inc. Registration Statement on Form S-8 under the Securities
     Act of 1933, as amended, including, without limiting the
     generality of the foregoing, to sign the Registration
     Statement in the name and on behalf of the Corporation or on
     behalf of the undersigned as a director or officer of the
     Corporation, and any amendments (including post-effective
     amendments) to the Registration Statement and any
     instrument, contract, document or other writing, of or in
     connection with the Registration Statement or amendments
     thereto, and to file the same, with all exhibits thereto,
     and other documents in connection therewith, including this
     power of attorney, with the Securities and Exchange
     Commission and any applicable securities exchange or
     securities self-regulatory body, granting unto said
     attorneys-in-fact and agents, each acting alone, full power
     and authority to do and perform each and every act and thing
     requisite and necessary to be done in and about the
     premises, as fully to all intents and purposes as he might
     or could do in person, hereby ratifying and confirming all
     that said attorneys-in-fact and agents, each acting alone,
     or his substitute or substitutes, may lawfully do or cause
     to be done by virtue hereof.

               IN WITNESS WHEREOF, the undersigned has signed
     these presents this 12th day of August 1994.



                                   \s\Samuel O. Thier, M.D.
                                   ------------------------------
                                   SAMUEL O. THIER, M.D.