Junk food in school checks childhood obesity

Before i go further lets take a look what is it mean by phrase "Junk Food".

According to wikipedia Junk Food describe as:

Junk food is an informal term applied to some foods that are perceived to have little or no nutritional value (i.e. containing "empty calories"); to products with nutritional value, but also have ingredients considered unhealthy when regularly eaten; or to those considered unhealthy to consume at all.

source:http://en.wikipedia.org/wiki/Junk_food

Implementing a 'no junk food' policy in schools has been shown to tackle effectively the over-weight problem among students. Assistant Professor Emma Sanchez-Vaznaugh, of San Francisco State University, and fellow researchers studied eight years of body mass index (BMI) data of school children aged 11 and 13 (fifth and seventh graders) in California. The study covered the period before and after a ban on sweetened beverages (including carbonated drinks) and a restriction on the sale of junk food in California's public schools. The data showed that before the policies took effect, the rate of over weight students was increasing between girls and boys. In the 3-year period after the policies were implemented, the increase in the number of over-weight children was significantly reduced between fifth-grade boys and both seventh-grade boys and girls throughout California.

Body mass index (BMI) is a amount of body fat based on height and weight that effects to adult men and women.

BMI Categories:

• Underweight = <18.5
• Normal weight = 18.5–24.9
• Overweight = 25–29.9
• Obesity = BMI of 30 or greater

First row is your BMI score

Second row is your weight in pounds (if you look for kilograms you can search over internet)

First column (left) is your heights in inches

Last but not least, it is parents responsible to monitor their kids food as well as food provider like canteen or a cafe must responsible to their food serve to childhood.