In the Dune series by Frank Herbert, at what age would people not from Arrakis (eg. Members of a Great House/aristocracy or the rich) start taking Melange? As it has geriatric properties to extend the life span of the user, would you wait until post 20s so you prolong at a mature stage or if you started say pre-teen would you still go through puberty at a normal rate?
If I remember correctly Paul Atreides hadn't taken Melange before arriving on Arrakis and he is 15 at the start of the series.