New research has found that the freshness of produce at U.S. grocery stores varies significantly from one grocery store to the next, as well as within individual stores. The study, conducted by the agricultural tech firm Zest Labs between February and May, measured and compared shelf life of produce being sold at major grocery chain stores across the country. It was based on random samples of strawberry clamshells, hearts of romaine lettuce and packaged salad mixes purchased throughout the research period from eight major U.S. grocery store chains. Its aim was to document some of the conditions that contribute to premature produce spoilage.
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