Every athlete wants to be number one. There is no need for competition if no one wants to be number one. Therefore the aim for every athlete to the best they can be is the goal for every athlete and there is nothing wrong with this.
To be the best you will need the best nutrition's. The best nutrition's doesn't have to mean the best supplements and certainly not for the teenage athlete. For nearly all athletes a good balanced sports nutrition diet should be more than enough without any supplements.