I'm 23 and ive ran a proper cycle before, kept all my gains.
Some kid today asked me about steroids. And naturally I went mad. Telling him he's way too young he's got more than enough natural test, all he has to do is eat right and he's sorted bla bla
After a few minutes of arguing. He started telling me about what cycle he was planning (test e and dbol, moderate amounts) he had everything perfect, proper pct, AI on hand, HCG, liver support, hawthorn berries... His diet seemed great, 6 meals a day and the correct amount of protein and calories for his weight
So I did not have the answer for why a 18 year old shouldn't do a cycle. If they know what they're doing, take the right precautions what are the ACTUAL risks all I know is that a 18 year shouldn't juice..no proper idea why