EXHIBIT 32.2

      CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

      I, John Dietrich, Vice President and Chief Financial Officer, certify,
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that the Annual Report of SunOpta Inc. on Form 10-K
for the year ended December 31, 2003 fully complies with the requirements of
section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the
information contained in such Annual Report on Form 10-K fairly presents in all
material respects the financial condition and results of operations of SunOpta
Inc. for the periods presented in such Report on Form 10-K.


                                  By: /s/ John Dietrich
                                      ---------------------
                                      John Dietrich
                                      Vice President and Chief Financial Officer
                                      March 12, 2004