Can you reuse plastic bags? Food-safety guidance draws a clear line
Latest news on WhatsApp أجدد الأخبار على واتسابAs households try to cut down on single-use plastics, a practical question keeps coming up: can plastic bags be reused safely? Food-safety guidance and research point to a conditional yes, with the main concern being cross-contamination, especially from raw meat, poultry, seafood or eggs to ready-to-eat foods.
EatingWell, citing Ziploc guidance, says zip-top food storage bags can be reused if they are washed with warm soapy water and fully dried, but should be discarded after holding raw meat, fish, eggs, or allergen-related foods.
Health Canada advises that reusable grocery bags and bins should be cleaned regularly, kept dry, and used in a way that separates raw animal products from produce and other foods. It recommends bagging raw meat, poultry and seafood separately to prevent leaks, and washing reusable bags inside out with hot soapy water if they are not machine-washable.
Peer-reviewed research supports these precautions. A 2011 study in Food Protection Trends reported high bacterial loads in most reusable bags tested, coliform bacteria in about half, and E. coli detected in 8%. It also found bacterial growth could increase tenfold after exposure to meat juices and warm storage conditions, while hand or machine washing reduced bacterial levels by more than 99.9%.
A 2019 Food Control study likewise documented microbial contamination in used reusable plastic bags, including groups such as Enterobacteriaceae and the detection of Listeria monocytogenes, noting that a bag’s clean appearance does not reliably indicate low contamination.
