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The Real Reason Grocery Stores Spray Water on Their Produce

Mental Floss logo Mental Floss 22/05/2019 Jake Rossen
a close up of a green leaf: The Real Reason Grocery Stores Spray Water on Their Produce © iStock/Edalin The Real Reason Grocery Stores Spray Water on Their Produce

The fresh produce section of a grocery store promises what few other aisles can—whole foods, largely unprocessed, full of nutritional benefits like fiber, vitamins, and antioxidants. Part of that “pure food” message is spread by tiny nozzles mounted above leafy greens that spray water all over vegetables in timed intervals.

There are, of course, perceived benefits to doing this. Psychologically, shoppers probably like seeing produce that’s shiny with water, presuming it’s going to remain fresh. Some stores even pipe in thunderstorm sound effects to complete the visual.

Gallery: 50 of the Unhealthiest Foods at the Supermarket (Reader's Digest)

The dirty truth? Watering them isn’t actually necessary in many cases. Grocery stores are doing it for another reason.

a store filled with lots of green leaves: The produce aisle in a grocery store © Provided by Sportority, Inc. (Mental Floss) The produce aisle in a grocery store

You might think that vegetables that have been uprooted and can no longer draw moisture from soil need a little topping off. In fact, the opposite is sometimes true: Excess water can lead to microorganisms thriving and spoiling plant tissue faster than if it was kept dry. If your kale looks a little brown in your cart, it might be because the store was too overzealous in watering it.

Stores have another reason for the showers. When fresh fruits and vegetables are doused in water, they absorb moisture. Since produce is often sold by weight, that means a saturated head of lettuce costs more than one that hasn’t been watered. When you get rung up, you’re essentially paying a premium for that water—by some estimates, up to 25 percent more.

Want to avoid the consequences of this mist-covered marketing strategy? You can save a little bit of money simply by shaking off excess water before bagging your produce. And you can remember to wash it when you get home. The in-store produce showers aren’t a substitute for rinsing off bacteria and other contaminants from food. It’s just another clever trick grocery stores use to encourage you to keep filling up your cart.

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