Mayo Clinic Experts Debunk Common Food Safety Myths

Registered dietitian Tara Schmidt and food scientist Roxi Smith recently detailed the science behind common food-safety myths on the Mayo Clinic’s On Nutrition podcast.

These misconceptions often influence daily kitchen habits, potentially exposing individuals to foodborne illnesses despite a perceived lack of risk. By separating fact from fiction, the experts aim to help listeners make informed decisions about the food they eat.

One of the most persistent beliefs discussed is the five-second rule. Smith said the rule is a myth because bacteria can transfer to food instantly rather than after a brief pause. This is supported by research indicating that the transfer of microbes can occur in less than one second ^[1].

The experts also addressed the safety of raw milk. Some consumers view unpasteurized milk as a healthier or safer alternative, but Smith said raw milk can contain harmful bacteria such as E. coli, Listeria, and Salmonella ^[2]. Because of these pathogens, she said it is not a safer alternative to pasteurized milk ^[2].

Beyond dairy and floor-dropped food, the podcast examined produce-washing practices. The discussion highlighted how certain common methods for cleaning fruits and vegetables lack scientific support. The goal of the episode is to replace these anecdotal habits with evidence-based safety protocols to prevent illness.

Schmidt and Smith emphasized that food safety is often counterintuitive. While a surface may look clean, the microscopic transfer of pathogens happens rapidly, rendering the time a piece of food spends on the floor irrelevant to its safety ^[1].