Obesity is being normalised by offering plus-size ranges of children's clothes.
This is the view of Dr Andrew Buist, deputy chairman of the British Medical Association's Scottish General Practitioners Committee.
Marks and Spencer has recently launched a clothing range for children as young as four, which caters for infants with waistlines up to 23 inches around.
While the store claims that it is "meeting consumer demand", Dr Buist said: "Creating plus-size clothing for children does go some way to normalising [obesity].
"Doctors have a role to play by supporting patients, talking about the dangers of poor diet and, inevitably, treating the medical consequences of obesity, but there is a limit to what they can do."
He added that parents need to understand the ways in which they can offer their child a healthy lifestyle.
However, there is also a role for education in schools to help children to understand the importance of a healthy diet and physical activity, noted the doctor.