i remember when we took 10ml (1ml/250mg) sustanon 250 together with my friend, 10ml each for 10 weeks 250mg/weekly, it was our first try of gear, i gained 3 kilos my friend gained 12 kilos and i was even eating more, he's just blessed with good genetics for bodybuilding, builds muscle easy, and i am very naturally skinny, he's 20 kilos heavier, but we have similiar strenght, all genetics