If you look for the meaning of the word “adolescent” you will find it is an adjective and describes “in the process of developing from a child into an adult” (google). How important is this? The process in which children move from dependence, to independence, to self-reliant, and self-monitoring. To learning to make decisions for themselves. What better to make “healthy” decisions.
The origin is late Middle English (as a noun): via French from Latin adolescent- ‘coming to maturity’, from adolescere, from ad- ‘to’ + alescere ‘grow, grow up’, from alere ‘nourish’ (google dictionary). The adjective dates from the late 18th century. The important part in this origin is “NURISH”.
The Office of Population Affairs describes just this, the important aspect of nourishment in the adolescent developmental stage. They focused a bulletin on teen health. They recommend a healthy and balanced diet, water intake and physical activity. This is imperative especially regarding school performance. And in the mental health community we would agree it would also impact mood and mental health.