Expert-Recommended Techniques for Safely Cleaning Fruits and Vegetables Before Consumption

Fruits and vegetables are often exposed to bacteria, viruses, and various contaminants while growing in open environments. This raises the question: what’s the most effective method to clean them, especially considering frequent recalls due to listeria, salmonella, and other harmful pathogens?

However, experts reassure that there’s no need to fear for the safety of your beloved strawberries or spinach. "The vast majority of fresh produce reaches us without any harmful pathogens," explains Donald Schaffner, Ph.D., a distinguished professor and food science expert at Rutgers University. "Consuming fresh produce is a healthy choice, and increasing your intake is likely more beneficial than avoiding it."

How can you ensure your fresh fruits and vegetables are clean from dirt, pests, harmful microorganisms, and chemical residues? The solution lies in adopting a quick yet efficient washing method.

The Best Way to Wash Fruits and Vegetables

According to Schaffner, rinsing or soaking your produce in plain tap water is often the most effective way to eliminate dirt, bacteria, and other contaminants. Surprisingly, a basic tap water rinse can remove 90% to 99% of bacteria found on fruits.

The FDA strongly advises against using soaps, detergents, or specialized produce washes, as these cleaning agents can be absorbed by the produce, potentially causing health issues.

Research comparing various produce cleaning methods—such as chlorine bleach and commercial vegetable washes—against common foodborne pathogens like E. coli, listeria, and salmonella revealed that plain running tap water yielded the most effective results.

Baking soda and vinegar are often suggested as natural produce cleaners, with the added advantage of being food-safe. However, research shows that lemon or vinegar solutions are no more effective than plain tap water for cleaning fruits and vegetables. Schaffner notes that studies on vinegar and sodium bicarbonate as produce washes have produced inconsistent results. "Factors like the type of produce, soaking duration, water movement, and the concentration of vinegar or baking soda play a significant role," he explains.

The concept of using vinegar or acidic solutions for cleaning produce has some scientific basis. "Vinegar's low pH can help eliminate bacteria, but if it's too diluted, it becomes almost indistinguishable from plain water," says Schaffner. "Using too much vinegar, however, can leave your produce tasting like vinegar."

While cleaning with vinegar or baking soda isn't harmful, Schaffner personally sticks to plain water for washing fruits and vegetables.

Rinsing vs. Soaking Fruits and Vegetables

Though not a critical decision, rinsing immediately removes dirt and contaminants from produce, unlike soaking, which leaves them in the water. For heavily soiled items like leeks or slightly wilted greens, an initial soak in cold water can help revive them. Gently scrubbing the produce with your hands can also help dislodge any remaining contaminants.

If you choose to soak your fruits and vegetables, make sure to rinse them under cold running water for at least a minute to eliminate any lingering contaminants.

Washing Harder-Skinned Produce

For tougher-skinned produce like apples, potatoes, and carrots, a vegetable brush can be more effective. "The main purpose of using a brush is to remove dirt or grit, which can be unpleasant," Schaffner explains. "No one wants to bite into gritty food."

Peeling is another effective method for removing contaminants, though it can also strip away essential nutrients, particularly in the case of potatoes.

Cleaning Delicate Fruit

Delicate fruits such as berries should be stored without washing and rinsed in cold water just before consumption. "Pre-washing berries and refrigerating them increases moisture, which can promote mold growth," Schaffner advises.

Handling Pre-Washed Vegetables

Despite concerns raised by produce recalls, Schaffner notes that rewashing pre-washed vegetable packs isn’t necessary and could even increase the risk of cross-contamination from bacteria or other contaminants present in your kitchen.