Over the past 12 years, six Canadian provinces have banned junk food from schools, and a new study suggests the measure is having a positive effect on student health.
The study looked at the BMI data of 153,000 Canadians aged 12 to 26, of whom about 22,000 had been banned from buying junk food at school derived from the Canadian Community Health Survey. The data was divided by province, health region and age.
The study revealed that for each year a student was exposed to a junk food ban, there was a corresponding 0.05 kg/m2 decline in their BMI. Students exposed to five or more years of a junk food ban had lower body mass index equivalent to a decrease of about two pounds for an individual who is five feet, six inches tall.