My daughter, now 19 began restricting her food intake at the age of 11. We were quick to notice taking her to the GP. Things escalated with her losing weight rapidly even though we were watching and monitoring her. She had been using social media, specifically pro-anorexia sites which then showed her extreme exercise and dieting sites along with self harm and suicide. She was lucky to be referred to CAMHS aged 12 due to low weight and prescribed antidepressants which she is still using today. Instagram/Facebook played a big role helping her with the tools. She attempted suicide twice, taking an overdose and trying to jump from a car on a dual carriageway. She will always have this knowledge, no 12 year old should know exactly how much fat and calories are in any food.