Exhibit 99.1

FOR IMMEDIATE RELEASE

SUNOPTA ANNOUNCES RECORD SECOND QUARTER AND FIRST HALF 2012 RESULTS

Toronto, August 9, 2012 - SunOpta Inc. (“SunOpta” or “the Company”) (NASDAQ:STKL) (TSX:SOY), a leading global company focused on natural, organic and specialty foods, today announced financial results for the quarter ended June 30, 2012. All amounts are expressed in U.S. dollars and results are reported in accordance with U.S. GAAP, except where specifically noted.

For the second quarter of 2012, the Company reported earnings of $8.1 million or $0.12 per diluted common share, as compared to earnings of $4.4 million or $0.07 per diluted common share for the quarter ended July 2, 2011, an 85% increase in earnings over the second quarter of last year. Excluding discontinued operations, earnings for the second quarter of 2012 were $7.6 million or $0.11 per diluted common share versus $5.6 million or $0.08 per diluted common share in the prior year. These earnings are a second quarter record for the Company after excluding one-time items in certain prior years. Included in earnings for the second quarter were approximately $1.7 million in pre-tax severance, acquisition and start-up costs ($1.1 million after tax), offset by a $0.7 million after tax gain on the sale of Purity Life Natural Health Products and approximately $0.7 million in tax adjustments that lowered the Company’s effective tax rate. Prior year earnings from continuing operations included pre-tax gains on the sale of assets of $3.0 million and a favorable adjustment of a legal claim of $0.5 million.

For the second quarter of 2012, the Company reported quarterly revenues of $282.3 million versus revenues of $275.2 million for the quarter ended July 2, 2011, a year over year increase of 2.6%. Excluding the impact of changes including foreign exchange rates, commodity-related pricing, acquisitions and rationalized product lines, revenues increased approximately 5% on a consolidated basis. The increase in consolidated revenues in the second quarter was driven by strong growth in integrated packaged food product categories within SunOpta Foods and the steel products segment within Opta Minerals Inc. These increases were somewhat offset by the effect of lower commodity grain sales, albeit at improved margins, and decreased volumes in the Company’s European organic ingredients operation.

Operating income¹ for the second quarter of 2012 increased to $14.3 million or 5.1% of revenues versus $9.8 million or 3.6% of revenues in the prior year, a year over year increase of 46.7%. This increase was primarily led by a significant improvement in operating income in the Grains and Foods Group versus the prior year.

For the quarter ended June 30, 2012, the Company realized EBITDA¹ of $19.4 million as compared to $14.2 million for the quarter ended July 2, 2011, a year over year increase of 36.6%.

For the two quarters ended June 30, 2012, the Company reported earnings of $14.0 million or $0.21 per diluted common share, as compared to earnings of $9.5 million or $0.14 per diluted common share for the two quarters ended July 2, 2011, a 48% increase in earnings compared to last year. Excluding discontinued operations, earnings for the two quarters ended June 30, 2012 were $13.0 million or $0.19 per diluted common share versus $11.1 million or $0.17 per diluted common share in the prior year. These earnings are a first half record for the Company after excluding one-time items in certain prior years. Included in earnings for the two quarters ended June 30, 2012 were approximately $2.2 million in pre-tax severance, acquisition and start-up costs ($1.4 million after tax), offset by a $0.7 million after tax gain on the sale of Purity Life Natural Health Products and approximately $0.7 million in tax adjustments that lowered the Company’s effective tax rate. Prior year earnings from continuing operations included pre-tax gains on the sale of assets of $3.0 million and favorable settlement of a legal claim of $0.5 million.

For the two quarters ended June 30, 2012, the Company reported revenues of $541.6 million versus revenues of $520.5 million for the two quarters ended July 2, 2011, a year over year increase of 4.1%. Excluding the impact of changes including foreign exchange rates, commodity-related pricing, acquisitions and rationalized product lines, revenues increased approximately 6% on a consolidated basis. The increase in consolidated revenues in the first two quarters of 2012 was driven by strong growth in integrated packaged food product categories within SunOpta Foods and the steel products segment within Opta Minerals Inc. These increases were somewhat offset by the effect of lower commodity grain sales, albeit at improved margins, and decreased volumes in the Company’s European organic ingredients operation.

Operating income¹ for the two quarters ended June 30, 2012 increased to $27.1 million or 5.0% of revenues versus $21.5 million or 4.1% of revenues in the prior year, a year over year increase of 26.1%. This increase was primarily led by improved operating income in the Grains and Foods Group versus the prior year.

For the two quarters ended June 30, 2012, the Company realized EBITDA¹ of $36.9 million as compared to $30.4 million for the two quarters ended July 2, 2011.

At June 30, 2012, the Company’s balance sheet reflects a current ratio of 1.47 to 1.00, and a total debt to equity ratio of 0.51 to 1.00. At June 30, 2012 the Company has total debt outstanding of $159.1 million, total assets of $643.5 million and a net book value of $4.75 per outstanding share. During the quarter the Company generated cash from operating activities of $28.8 million versus $20.5 million in the prior year, indicative of improved earnings and improved cash provided by working capital.

Steve Bromley, Chief Executive Officer of SunOpta commented, “We are very pleased with our second quarter and first half results as they reflect continued momentum in our core natural and organic foods business, plus the positive impact of operational improvements which we have continued to implement. During the quarter we realized strong cash flows, and subsequent to quarter end announced the amendment and expansion of our syndicated credit facilities that support our core food platform in North America. These new facilities will provide additional flexibility in support of our internal growth initiatives as well as potential acquisitions. We remain confident in our focus on natural and organic foods and our strategy to improve operating margins and return on assets, and are encouraged by our progress.”

The Company plans to host a conference call at 10:00 A.M. Eastern Time on Friday August 10th, 2012 to discuss the results for the second quarter of 2012 and recent corporate developments. The conference call can be accessed via a link at the Company’s website at www.sunopta.com. Additionally, the call may be accessed with the toll free dial-in number 1-877-312-9198 or 631-291-4622. A replay number can also be accessed between August 10th and 17th with the toll free dial-in number 1–855-859-2056 or 404-537-3406 followed by pass code: 90040467#.

¹See discussion of non-GAAP measures

About SunOpta Inc.

SunOpta Inc. is a leading global company focused on natural, organic and specialty foods products. 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 66.2% ownership position in Opta Minerals Inc., listed on the Toronto Stock Exchange, a producer, distributor, and recycler of environmentally friendly industrial materials; and a minority ownership position in Mascoma Corporation, an innovative biofuels company.

Forward-Looking Statements

Certain statements included in this press release may be considered “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 and applicable Canadian securities legislation, which are based on information available to us on the date of this release. These forward-looking statements include, but are not limited to, our continued momentum in our core natural and organic foods business, the positive impact of operational improvements, additional flexibility provided by our new credit facilities and our strategy to improve operating margins and return on assets. The terms and phrases “continued”, “improve”, “will provide”, “remain confident” and other similar terms and phrases are intended to identify these forward looking statements. Forward looking statements are based on information available to us on the date of this release and are based on estimates and assumptions made by the Company in light of its experience and its perception of historical trends, current conditions and expected future developments as well as other factors the Company believes are appropriate in the circumstances including, but not limited to, general economic conditions, consumer interest in health and wellness, product pricing levels, current customer demand, planned facility and operational expansions, competitive intensity, cost rationalization and product development initiatives. Whether actual timing and results will agree with expectations and predications of the Company is subject to many risks and uncertainties including, but not limited to, global economic conditions, consumer spending patterns and changes in market trends, decreases in customer demand, potential failure of product development, working capital management and continuous improvement initiatives, availability and pricing of raw materials and supplies, potential covenant breaches under our credit facilities and other risks described from time to time under “Risk Factors” in the Company’s Annual Report on Form 10-K and its Quarterly Reports on Form 10-Q (available at www.sec.gov). Consequently all forward-looking statements made herein are qualified by these cautionary statements and there can be no assurance that the actual results or developments anticipated by the Company will be realized.

For further information, please contact:

SunOpta Inc.

Steve Bromley, President & CEO
Robert McKeracher, Vice President & CFO
Susan Wiekenkamp, Information Officer
Tel: 905-455-2528, ext 103
susan.wiekenkamp@sunopta.com
Website: www.sunopta.com

SunOpta Inc.
Consolidated Statements of Operations
For the quarter ended June 30, 2012 and July 2, 2011
Unaudited
(Expressed in thousands of U.S. dollars, except per share amounts)

SunOpta Inc.
Consolidated Statements of Operations
For the two quarters ended June 30, 2012 and July 2, 2011
Unaudited
(Expressed in thousands of U.S. dollars, except per share amounts)

SunOpta Inc.
Consolidated Balance Sheets
As at June 30, 2012 and December 31, 2011
Unaudited
(Expressed in thousands of U.S. dollars, except per share amounts)

SunOpta Inc.
Consolidated Statements of Cash Flows
For the quarter ended June 30, 2012 and July 2, 2011
Unaudited
(Expressed in thousands of U.S. dollars, except per share amounts)

SunOpta Inc.
Consolidated Statements of Cash Flows
For the two quarters ended June 30, 2012 and July 2, 2011
Unaudited
(Expressed in thousands of U.S. dollars, except per share amounts)

SunOpta Inc.
Segmented Information
For the quarter ended June 30, 2012 and July 2, 2011
Unaudited
(Expressed in thousands of U.S. dollars)

SunOpta Foods has the following segmented reporting:

SunOpta Foods has the following segmented reporting:

(Operating Income (Loss) is defined as “Earnings from continuing operations before the following” excluding the impact of “Other expense, net”)

SunOpta Inc.
Segmented Information
For the two quarters ended June 30, 2012 and July 2, 2011
Unaudited
(Expressed in thousands of U.S. dollars)

SunOpta Foods has the following segmented reporting:

SunOpta Foods has the following segmented reporting:

(Operating Income (Loss) is defined as “Earnings from continuing operations before the following” excluding the impact of “Other expense, net”)

¹Non-GAAP Measures

In addition to reporting financial results in accordance with generally accepted accounting principles (“GAAP”), the Company provides information regarding Operating Income and Earnings before interest, taxes, depreciation and amortization (“EBITDA”) as additional information about its operating results, which are not measures in accordance with GAAP. The Company believes that these non-GAAP measures assist investors in comparing performance across reporting periods on a consistent basis by excluding items that are not indicative of the Company’s core operating performance. The non-GAAP measures of operating income and EBITDA should not be considered in isolation or as a substitute for performance measures calculated in accordance with GAAP.

The Company defines Operating Income as “Earnings from continuing operations before the following” excluding the impact of “Other expense, net”; and EBITDA as Operating Income plus depreciation and amortization. The following is a tabular presentation of Operating Income and EBITDA, including a reconciliation to GAAP earnings, which the Company believes to be the most directly comparable GAAP financial measure: