My DS is 15. He is very tall at 6'2 but only weighs 54kg. His is extremely skinny. Definitely doesn't have an eating disorder, but I think he is just one of those people that can forget to eat. He loves food and eats anything and everything but tends towards healthy snacks of fruit and veggies. I have to remind him it's time to eat at the weekends and I suspect his low weight is because he is not feeding himself properly during a long school day where he might be out of the house from 7am-5pm. Any suggestions of what I can do to help? I've known he was skinny but it's only just come to my notice how underweight he is. I send him to school with money and snacks - both just accumulate in his bag (hot lunch is provided by school).