Food insecurity is largely about the struggle to afford food. Insufficient social assistance, increases in the number of low-wage, part-time, or contract jobs, and a lack of affordable housing have created financial constraints that make it more and more difficult to eat. Proof, a food-insecurity research group at the University of Toronto, breaks down the problem a few ways. Worrying that you’ll run out of provisions before you manage to buy more is “marginally food insecure.” According to Proof’s analysis of the most recent nationwide data from Statistics Canada, about 580,000 households fell into that category in 2012.