Will growth hormone cause an adult person to grow in height?
HGH will make a child grow taller, but not an adult.
After the growth plates at both ends of the human bones are closed (which happens around age 18) nothing can make an adult grow taller in height. After that age, HGH is recreationally used for muscle building, fat loss, anti aging. It can be prescribed to speed up regeneration after severe burns or injuries.
Growth hormone makes the nails, skin and hair grow noticeably faster but it cannot make the bones grow.