Children as young as five are being referred for treatment for depression and anxiety, the BBC has found.

Figures showed mental health teams in Sussex are working with more than 1,000 under-18s while in the Solent 324 young people were referred for therapy. ...
BBC News - Five-year-olds treated for depression and anxiety

To be sure we have difficult social situations. And, what's not mentioned here, large factors such as the collapse of religious belief (I'm not making a religious point here -- I'm not a religious person -- but a sociological one) and almost a de-culturation of people.

However, psychological and sociological explanations are one thing. One question that is not even raised in the article is: "What are these children eating?"