 Competitive food includes such items as vending machines (which usually contain high-calorie sugary drinks and sodas, as well as other junk foods), snack bars, and pizza or bake sales.School lunch nutrition is of particular importance currently due to the emerging childhood obesity epidemic.Using the definition of obesity as having a BMI-for-age of greater than the 85th percentile, approximately 31.7% of American children qualify as being overweight, whereas 16.9% of US children aged 2 through 19 years meet criteria for being obese (with BMI-for-age greater than the 95th percentile).