Depends: Ultimately genetics plays the most powerful role in determining your final adult height. Of course good nutrition, lots of sleep, and a nurturing environment as a child can effect total height as well but in your case you are likely on the tail end of growth at 18 years. Seems highly unlikely that you will grow a full 5-6 inches in the next few years.
Answered 8/21/2015
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4 doctors weighed in across 2 answers
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