What should i maximize at age 15?

[Valdemarbjerg]

Im starting on ghk-cu, and im already in the gym.
Is there anything i should do before my growth plates close?

 

[trxyzyx]

Im starting on ghk-cu, and im already in the gym.
Is there anything i should do before my growth plates close?

eating in a surplus and prolly mk677

 

[Secretmogger]

eating in a surplus and prolly mk677

mk677 barely helps bro, atleast from my experience