Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

I, Marc D. Grodman, Chief Executive Officer of Bio-Reference Laboratories, Inc. (the ACompany@), do hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(a)the Annual Report on Form 10-K of the Company for the fiscal year ended October, 31 2007, which this certification accompanies (the APeriodic Report@), fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and

(b)based on my knowledge, the information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: January 10, 2008

/S/ Marc D. Grodman

Marc D. Grodman

Chief Executive Officer

Bio-Reference Laboratories, Inc.

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