The Infinity Formula is an experimental drug in the Marvel Universe that slows the aging process. It is used by Nick Fury and many of his comrades. In Shield #4 it is revealed that the Infinity Formula may not have been invented by Dr. Berthold Sternberg as previously believed (Marvel Spotlight #31). According to levels of potency, the serum goes by different names. It is used both to incur loyalty and as a means of breaking prisoners by SHIELD. It is seen being used on a chained Nostradamus, to ensure that he will live long enough to go insane due to a combination of immortality, imprisonment, and isolation. Nick Fury's aging process was incredibly slowed by taking regular doses but now he doesn't take anymore and his son inherited the effects.