Women usually reach their adult height by age 18. Men usually have a growth gain between 17 and 21. It is in your genetics how tall you will be, but you can’t just go by your parents height. They may have a taller brother or sister or even an Aunt or Uncle that is tall and therefore they may carry a taller gene. The best that you can do is make sure you get the nutrition necessary for your greatest growth, before the bones stop growing. This means proteins and fats and vitamin rich foods. Include vitamin C, vitamin D, and vitamin K2 as these are important for strong bones. Balanced minerals are also important.