On June 3, 2026, Sainsbury's announced a significant shift in its egg sourcing strategy by eliminating brown eggs from its own-brand products in favor of white eggs. This decision is rooted in findings from a lifecycle assessment by SAC Consulting, which revealed that white eggs, produced by smaller, white-feathered hens, have a 12.7% smaller carbon footprint compared to their brown counterparts. The supermarket highlighted that these hens are not only more efficient in terms of feed consumption but also exhibit better welfare outcomes, including longer lifespans and lower aggressive behaviors. Despite the environmental benefits, many customers have voiced concerns regarding the perceived brittleness and paler yolks of white eggs. Some users on social media reported issues with the shells being thinner, while others defended the nutritional equivalence of both egg types. Sainsbury's reassured customers that the taste and nutritional value of white eggs remain unchanged, emphasizing their commitment to sustainability and animal welfare. The CEO of The Lakes Free Range Egg Co. expressed support for this transition, stating it could positively reshape the UK egg industry, benefiting farmers and consumers alike.