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Greggs' chief executive, Roisin Currie, confirmed that appetite-suppressing medication and wider health trends are impacting the bakery chain's business.
The company is adapting by introducing healthier menu items, including egg pots and overnight oats, to meet customer demand for smaller portions and nutritional information.
Despite the focus on healthier options, hot snacks remain popular, with Greggs selling an average of 1.3 million hot food items weekly in 2025.
Greggs reported a 7.4 per cent increase in total sales for the three months to December 27, although full-year like-for-like sales growth was 2.4 per cent, less than half of the previous year.
Other major retailers, including Tesco and M&S, are also responding to the rise in weight loss medication by monitoring consumer trends and launching 'nutrient-dense' food ranges.