Thanks for writing in.
Epiphysial plates close by early to mid twenties in males. Height is mostly genetic and is determined by heights of your parents and a healthy diet and regular exercise
HGH replacements in the form of injections have been known to cause acromegaly. If it occurs with HGH releasers is not yet clear.
Common side effects include fluid retention, weight gain, high BP, abnormal cartilage and bone growth.
Hope this helps!