Scientists Discover A New Way To Keep Fruit Fresh Longer — And It Removes Pesticides Too

April 18, 2026

A simple rinse could soon make your fruit cleaner, safer, and longer-lasting, thanks to a breakthrough from researchers at the University of British Columbia.

Credit: CTV News / UBC

Scientists there have created a natural, biodegradable fruit wash that not only removes a large portion of pesticide residue but also helps keep produce fresh for longer. In a world where food waste is a growing problem and fresh produce prices continue to rise, this small innovation could have a big ripple effect.

“Our goal was to create a simple, safe and affordable wash that improves both food safety and food quality,” said lead researcher Dr. Tianxi Yang. “People shouldn’t have to choose between eating fresh produce and worrying about what’s on it.”

A smarter way to clean fruit

Even though pesticide levels are regulated, trace amounts often remain on fruits and vegetables. For people who eat a lot of the same produce—especially children—those small amounts can add up.

That concern hit close to home for Dr. Yang, whose son loves blueberries, inspiring her to look for a better solution.

The team developed a wash made from tiny starch-based particles — similar to compounds found in everyday foods like corn and potatoes — combined with iron and tannic acid (a natural plant compound also found in tea and wine). Together, these ingredients form microscopic, sponge-like clusters that latch onto pesticide residues and lift them away from the fruit’s surface.

When tested on apples with commonly used pesticides, the wash removed between 86% and 94% of residue, far outperforming typical methods like tap water or baking soda, which remove less than half.

A “second skin” for freshness

But the innovation doesn’t stop at cleaning.

After washing, fruit can be dipped again to receive a thin, edible coating that acts like a protective barrier. This layer helps slow down browning and reduces moisture loss—two major reasons fruits spoil so quickly.

“The coating acts like a breathable second skin,” Dr. Yang explained. “Measures of food quality like acidity and soluble sugars also remained higher in coated fruit.”

The results are impressive:

Fresh-cut apples stayed crisp and browned much more slowly over two days in the fridge.

Grapes remained plump for up to 15 days at room temperature, while untreated ones shriveled.

The coating even showed antimicrobial properties, helping to inhibit harmful bacteria.

Affordable, scalable—and possibly coming home

Despite its high-tech feel, the solution is surprisingly affordable. Researchers estimate it would cost about three cents per apple, similar to existing commercial treatments, but with the added benefit of removing pesticides and extending shelf life.

The team believes it could easily be adopted by food processing facilities and is already working on scaling up production. They’re also exploring the possibility of a home version.

“Imagine a spray or tablet you could add to water right before washing your fruit,” said Dr. Yang.

More testing is still needed before it reaches kitchen sinks, but the vision is clear: safer produce, less waste, and more confidence in what we eat.

“Our hope,” Dr. Yang said, “is to help people feel confident about the produce they bring home, knowing it’s safer, lasts longer and creates less waste.”