Exhibit 5.01
                        LAW OFFICE OF ANDREA CATANEO LTD.
                               81 MEADOWBROOK ROAD
                               RANDOLPH, NJ 07860

                                 (973) 442-9944
                                 (973) 442-9933
November 7, 2002

Board of Directors
ProHealth Medical Technologies, Inc.




In re:   ProHealth  Medical  Technologies,  Inc. (soon to be renamed Applied DNA
         Sciences, Inc.
         Registration Statement on Form S-8
         Professional/Employee/Consultant  Stock  Compensation  Plan for Applied
         DNA Sciences, Inc.


Gentlemen:

We have acted as special  counsel to  ProHealth  Medical  Technologies,  Inc., a
Nevada  Corporation,  ("the  Company") in connection  with the  preparation of a
registration  statement to be filed with the Securities and Exchange  Commission
on Form S-8 (Registration  Statement) on or about November 7, 2002,  relating to
the proposed issuance of up to 2,000,000 (Shares) of the Company's Common Stock,
(par  value  of  $0.0001   per   share)   pursuant   to  the  terms  of  a  2002
Professional/Employee/Consultant   Stock   Compensation  Plan  for  Applied  DNA
Sciences,  Inc. (the "PEC Plan") dated November 5, 2002. In this connection,  we
have examined such  documents,  corporate  records and other papers as we deemed
necessary to examine for the purposes of this opinion.

We have  examined  the PEC Plan and the  underlying  contracts  of the  eligible
individuals,  where appropriate,  as well as such corporate records,  documents,
instruments  and  certificates  of the  Company,  and have  reviewed  such other
documents,  as  we  have  deemed  relevant  under  the  circumstances.  In  such
examination,  we have assumed without independent investigation the authenticity
of  all  documents  submitted  to  us  as  originals,  the  genuineness  of  all
signatures, the legal capacity of all natural persons, and the conformity of any
documents submitted to us as copies to their respective originals. As to certain
questions of fact material to this opinion,  we have relied without  independent
investigation  upon statements or certificates of public  officials and officers
of the Company.

Based upon and subject to the foregoing,  we are of the opinion that the Shares,
when issued in accordance with the Plans, will be legally issued, fully paid and
non-assessable.




In connection with this opinion,  we have examined the  Registration  Statement,
the Company's Articles of Incorporation and By-laws, and such other documents as
we have  deemed  necessary  to  enable  us to  render  the  opinion  hereinafter
expressed.

We render no opinion as to the laws of any jurisdiction  other than the internal
laws of the State of Nevada.

We hereby consent to the use of this opinion as an exhibit.

This  opinion  is  conditioned  upon  the  compliance  by the  Company  with all
applicable  provisions of the Securities Act of 1933, as amended, and such state
securities rules, regulations and laws as may be applicable.

Very truly yours,
LAW OFFICE OF ANDREA CATANEO LTD.

/s/ Andrea Cataneo
------------------------
By: Andrea Cataneo, Esq.