How many calories does a normal 13 year old burn in a day?

(hope) unrealistic portrayals of slim bodies can encourage people to lose an unhealthy amount of weight. being underweight or malnourished can lead to a. liver abnormalities b. tendon rupture c. muscle damage d. heart issues

What is the hormone in your brain that makes you feel happy?

How could you find out if that advice is based in scientific evidence?