question:  In simple terms, how does the anti-aging process work?
context: But with the Procyon shuttle arriving yesterday, there was no telling what might turn up. Besides, that fool of a medicist had sworn the shot would cure any allergy or asthma. For eighty years now, they’d been sending out the little ships that vanished at greater than the speed of light, equipped with every conceivable device to make them return automatically after taking pictures of wherever they arrived. Scientists there had puzzled over it, reset it and sent it back. He had no desire to spend ninety years cooped up with a bunch of callow young emigrants, even in one of the improved Exodus shuttles. The discovery that men could live practically forever had put an end to most family ties; sentiment wore thin in half a century—which wasn’t much time now, though it had once seemed long enough. Faint blur lines indicated it had been moving when the picture was taken. Earth was becoming a backwater world; no real progress had been made in two centuries; the young men were sent out as soon as their first fifty years of education were finished, and the older men were too conservative for really new thinking. That missile reached Sirius in less than ten days. It took two accidents to get the thing back to us—and with a half-light-year miss that delayed it about twenty years before the Procyon shuttle heard its signal. Pre-setting a course may take centuries, if we can ever master it. Even with Sirius expecting the missiles and ready to cooperate. We’ve had it drafted for building long enough; now we can finish it in three months. We can’t put human pilots into a ship with our drive until we’ve tested it more thoroughly, Bill, even if they could correct for errors on arrival. Usually it was too easy to realize that, and the sight of the solid, time-enduring buildings outside should have given him a sense of security. Dubbins was at his side almost at once, with a hand under his arm to guide him toward his suite.
output:  It makes your brain think it’s younger through memories, and treat the body’s growth that way.
options:  It makes your brain think it’s younger through memories, and treat the body’s growth that way.  It tricks the patient into believing they’re younger.  It replaces key parts in your cells with young cells.  It halts growth all together by communicating with your brain.