Of course the knowledge of basic athletic nutrition and training is essential if you are under the age of 18, well 21 for that matter. Asking questions and probing into the endless supplement pyramid is also good, for knowledge is power and how is one supposed to learn unless they ask. Right?
Honestly, in my opinion, if you are under the age of 18 there are only a few supplements that you should be considering and that's protein powders, creatines, BCAA's and other aminos, and a good multivitamin.
To answer your question though my friend there is no reason why somebody under the age of 18 could not take USPlabs cAMPHIBOLIC. There's no need for concern as it is not a hormone altering compound. If losing bodyfat and gaining muscle is what you are looking for than cAMP is a safe alternative to other harmful, less legal, substances you could choose from out there. It's perfectly safe and there are vitually no sides associated with it's use.
But, in my opinion, if you're under 18 stick with the basics, especially a sound nutritional plan and a hardcore training regiman.