Hi i did review your concern. Isolated growth hormone deficiency is a cause of short stature in few individuals. The cause is genetic/idiopathic but basic defect is lack of pituitary gland production of adequate Growth hormone. A famous footballer also had this problem, but with adequate treatment like him you also can attain average height if the GH supplements are started before epiphyseal closure begins. Since You still have 10 months to go I do hope some improvement in your height eventually, but it will be limited by the fact that response will be slow as epiphysis would have started closing. I would advice you to take healthy diet along with it rich in proteins. Supergrowth i am not very sure about but it is entirely your choice to have it. I hope this answer helps you Wish you good luck.