Age limit is although 18-21 and you may take medicine in this age groups,but in some cases one may see the difference in elder age group too..

Hii, Although u have crossed the age where u can effectively grow your height but still one can manage it to have an inch or two of height with the conjoint effects of medicine, exercise, and proper diet.You need to go through this with full strength and dedication and the results will be there positively. Thanks and all the best