A New Approach to Keeping Fruit Fresh and Free from Pesticides
April 18, 2026
A team of researchers at the University of British Columbia has developed an innovative fruit wash that could revolutionize how we keep produce clean and fresh. This breakthrough offers a natural and biodegradable solution to remove pesticide residues and prolong fruit shelf life, addressing growing concerns over food waste and the rising cost of fresh produce.
Credit: CTV News / UBC
The wash is a result of the efforts led by Dr. Tianxi Yang, who aimed to create “a simple, safe and affordable wash that improves both food safety and food quality.” Dr. Yang emphasized the importance of not having to choose between consuming fresh produce and being concerned about residual pesticides.
An Enhanced Method for Fruit Cleaning
Though regulations ensure pesticide levels on produce remain low, trace amounts persist, which can accumulate, particularly affecting children who consume large quantities of similar produce. Inspired by her son’s fondness for blueberries, Dr. Yang and her team sought a better cleaning method.
The solution involves a wash made from starch-based particles, akin to those in corn and potatoes, combined with iron and tannic acid. These elements create microscopic clusters that effectively detach pesticide residues from fruit surfaces. Tests conducted on apples showed the wash removed 86% to 94% of pesticide residues, outperforming traditional methods like rinsing with water or using baking soda.
A Protective Layer for Prolonged Freshness
The innovation extends beyond cleaning. After washing, fruits can undergo a secondary dip to receive a thin, edible coating. This serves as a protective barrier, slowing down browning and curbing moisture loss, which are key factors in fruit spoilage.
Dr. Yang remarked that “the coating acts like a breathable second skin,” mentioning that indicators of food quality, such as acidity and sugar levels, remained higher in coated fruits.
Noteworthy Outcomes:
- Fresh-cut apples retained their crispness and resisted browning for over two days in refrigeration.
- Grapes remained plump for up to 15 days at room temperature, unlike untreated ones which shriveled.
- The coating also demonstrated antimicrobial qualities, reducing harmful bacteria.
Cost-Effective and Scalable for Widespread Use
Despite its advanced nature, the fruit wash is cost-effective, estimated to cost around three cents per apple, aligning with current commercial treatments but with added benefits. The research team is working on scaling production for potential use in food processing facilities and is exploring consumer-friendly options like a home-use spray or tablet.
Dr. Yang envisions a future where such innovations render produce safer, reduce waste, and enhance consumer confidence.
She added, “Our hope is to help people feel confident about the produce they bring home, knowing it’s safer, lasts longer and creates less waste.”
