By Tara Duggan | San Francisco Chronicle

Having food security, by its simplest definition, means that you know where your next meal is coming from.

People who can’t reliably get three meals a day are considered food insecure. The U.S. Department of Agriculture defines food insecurity as “the limited or uncertain availability of nutritionally adequate and safe foods” or the “uncertain ability to acquire acceptable foods in socially acceptable ways.” “Very low food security” means having to skip meals or not eat for a whole day and experiencing regular anxiety about where food will come.

There are two main ways to measure food insecurity: analyzing income compared to cost-of-living data and conducting surveys. But there are different ways of defining and measuring food insecurity according to those methods.

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