So from what I know the problem with people in their early twenties getting a transplant is that when future hair loss is considered and if they run out of donor hair they will have unnatural look. But what if the hairs that are supposed to fall last (the hairs which last longer) are transplanted into the frontal hairline and the DHT resistant hairs next to that. So that they will have their original hairline during their young years and when they get older they will have slightly receded hairline like most men. They can make the frontal hairline last longer by using medications. Of course they will have to spend more money but it will be worth it.