The boss of Greggs said there was "no doubt" hugely popular appetite suppressing drugs have led to people looking for "smaller portions", affecting the company's bottom line.
People are also looking for "protein and fibre", and generally healthier options, Roisin Currie said, adding the bakery has been introducing products to tap into that market.
Greggs has previously said people's dietary changes led it to move away from its usual fare of hearty and high-fat pasties, cakes and pastries.
Currie's comments come as the firm reported lacklustre profits and a muted forecast for the coming year.
Currie said there was a "broader health trend" emerging with people demanding more protein.
