Medifast (MED) 10-Q 2016 Q1 Quarterly report

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

In connection with the Quarterly Report on Form 10-Q (the “Report”) for the quarter ended March 31, 2016 of Medifast, Inc. (the “Company”), as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Michael C. MacDonald, Chief Executive Officer and I, Timothy G. Robinson, 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, to the best of my knowledge, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of the operations of the Company.

By:	/s/	Michael C. MacDonald
		Michael C.  MacDonald
		Chief Executive Officer
		May 10, 2016
By:	/s/	Timothy G. Robinson
		Timothy G. Robinson
		Chief Financial Officer
		May 10, 2016