Hello-
follow these tips and ayurvedic medicines for height gain-
1) practice yoga (tadasana, padmasana) and stretching exercises instead of gym.
2) take cows milk & ghee instead of buffalo's in diet.(nutrients in cows milk promotes height)
3) avoid fast foods and non veg diet, promote vegan diet.
4) wake up before 6: 30 and sleep before 10: 30.(sound sleep promotes height)
5) ayurvedic supplements like chyawanprash, fal ghrita, lakshadi guggulu etc help in attaining perfect height up to the age of 21 years.
6) daily massage your body in the morning with sesame oil.