SunOpta Inc. Schedules First Quarter 2011 Financial Results Release and Conference Call

April 21, 2011

TORONTO, April 21, 2011 (GLOBE NEWSWIRE) -- SunOpta Inc. ("SunOpta" or the "Company") (Nasdaq:STKL) (TSX:SOY) announced today that it will issue its financial results for the first quarter ended April 2, 2011 on May 11, 2011, after the close of the stock markets.

The Company plans to host a conference call at 10:00 AM Eastern Time on Thursday, May 12, 2011, to discuss the first quarter 2011 financial results and recent corporate developments. After opening remarks, there will be a question and answer period. This conference call can be accessed via a link at the Company's website at www.sunopta.com. To listen to the live call over the Internet, please go to the Company's website at least 15 minutes early to register, download and install any necessary audio software. Additionally, the call may be accessed with the toll free dial-in number 1 (877) 312 - 9198 or International dial-in number (613) 291 - 4622. If you are unable to listen live, the conference call will be archived and can be accessed for approximately 90 days at the Company's website. A replay number can also be accessed between May 12th and 19th with the toll free dial-in number 1 (800) 642 - 1687 or (706) 645 - 9291 followed by pass code: 62090916#.

About SunOpta Inc.

SunOpta is a leading global company focused on natural, organic and specialty foods. The Company specializes in sourcing, processing and packaging of natural and organic food products, integrated from seed through packaged products; with a focus on strategically vertically integrated business models. The Company's core natural and organic food operations focus on value-added grains, fiber and fruit based product offerings, supported by a global infrastructure. The Company has two non-core holdings, a 66.4% ownership position in Opta Minerals Inc. (TSX:OPM), a producer, distributor, and recycler of environmentally friendly industrial materials; and a minority ownership position in Mascoma Corporation, an innovative biofuels company.

The SunOpta Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=3958.

CONTACT: SunOpta Inc.

         Steve Bromley, President & CEO

         Eric Davis, Vice President & CFO

         Tony Tavares, Vice President & COO

         Susan Wiekenkamp, Information Officer

         Tel: 905-455-2528, ext 103

         susan.wiekenkamp@sunopta.com

         Website:  www.sunopta.com