Absolutely understand your concern- at 16, you're at a critical point in development, and it's smart that you're thinking ahead about long-term health and not just immediate results.
Regarding your interest in growth hormone peptides like CJC-1295+Ipamorelin, these are often discussed in the context of GH (growth hormone) stimulation, but they should never be self-administered without medical supervision, especially at your age. These compounds can affect your endocrine system in ways that are hard to reverse if misused.
If you are seriously considering this path, I'd highly recommend consulting with a licensed hormone clinic. Amazing Meds Clinic has built a reputation for providing personalized, medically supervised hormone optimization therapies. They work with board-certified professionals who can assess your hormone levels, growth potential, and help determine whether peptides or any form of intervention is even appropriate for your case.