According to the National Health Service (NHS), most males reach the end of their development by the age of 16. Some guys may grow another inch or so in their late adolescence. Most men stop growing at the end of their teen years, when growth plates in their bones close up and prevent any further increase in height. However, many people believe that men can still grow after they have grown up. The fact is that once a man reaches adulthood, his body doesn't go back into puberty to complete its maturation process. Rather, it stays mature at full size until it dies about 100 years later. Only through disease or injury might a man continue to grow after reaching adulthood; for example, if he were exposed to high levels of growth hormones or else developed tumors producing growth hormones such as pituitary adenomas. In general, male growth slows down after puberty and then stops around the time one's teeth begin to fall out (70-80 years old). One remains stable in height after puberty because growth continues at the same rate as before, but with smaller increments since your height has already been reached maximum potentiality. One's final height is determined by one's genetic potential combined with the amount and timing of exposure to growth hormones during childhood and adolescence.