when does the normal person stop growing at what age?

when does the normal person stop growing at what age? and what causes one to stop growing?

anyone know?

You never stop growing. Most people will have reached thier max height by age 21, but probably before that. (I'm guessing thats the answer you wanted) But other parts of your body never stop growing. The answer to this question will really depend on what you mean by 'growning'. If you make your question clearer, you will get a better answer.

agree with adrock
you can always grow--yes height is around 19-21 depending on genes
but body can grow----as with weights you grow till hit genitic potential then have to do gear. will muscles stop--i think there is a time that thats all the body will allow depending again on your genes but can still grow people can get as fat as the moon--different type of growth but its growth

i mean by getting taller. and if u took roids that completle stops your growth right? so whats the normal age people stop getting teller.

16-18 for girls
19-21 for guys but some go as high as 25 yrs old