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UK supermarkets use hidden codes on produce labels to show freshness, not safety, with varying formats by retailer.
UK supermarkets including Asda, Tesco, Sainsbury's, and Morrisons use hidden codes on fresh produce labels to indicate best-before dates, helping shoppers choose fresher items.
Codes vary by retailer: Tesco and Asda use a letter-number format, Sainsbury’s uses a 'J' to 'S' code with the date in between, and Morrisons uses the first letter of the month followed by the day.
These dates reflect quality, not safety, so produce is often safe to eat past the date if it looks and smells fine.
Morrisons is also rolling out digital electronic shelf labels starting in early 2026, replacing paper tags with real-time price and promotion updates to improve efficiency and customer experience.
Los supermercados del Reino Unido utilizan códigos ocultos en las etiquetas de los productos para mostrar la frescura, no la seguridad, con formatos que varían según el minorista.