Biodegradable fruit wash removes pesticides and keeps grapes fresh for 15 days
UBC researchers developed a biodegradable, starch-based fruit wash using iron and tannic acid that binds and removes 86–94% of surface pesticides and then forms an edible, breathable coating that slows oxidation and moisture loss, keeping grapes firm for up to 15 days at room temperature and suggesting a low-cost option for both households and food processors pending regulatory approval.