Income Security Advocacy Centre - there's lots of links on the ISAC page that will explain all the ins and outs of the new changes to the Special Diet Allowance. There's two information sheets that are an excellent resource to print and share.
ISAC was established in 2001 by Legal Aid Ontario to serve low income Ontarians by conducting test case and Charter litigation relating to provincial and federal income security programs: OW, ODSP, EI, and CPP-d.
Be sure to take a scroll through all of the resources that ISAC offers - lots of reliable, relevant, and clarifying fact sheets.