Geriatricol
Description: well, in its ‘natural’ form Geriatricol is a swarm of self-replicating nanobots that are individually too small to see. But in its natural form Geriatricol will self-destruct when exposed to atmosphere, so it usually comes in the form of a yellow gel pill.
Powers: one dose of Geriatricol cosmetically ages the subject. Within five minutes of ingestion, his or her skin and hair will wrinkle and whiten; sweat, stools, and urine will become compatible with an old person’s; and a superficial blood analysis will bring back a positive result for a number of minor ailments associated with being old. The effects are not permanent: if not reversed, the process begins to reverse itself within two weeks and completely reverse within two more. Underlying health, reflexes, mental agility, bodily functions, and ultimate lifespan remain unaffected.