Life Measured

Life is not Measured in the wealth you hold but by the lives you touch and the people you help.Edwin Jarvis only has one important mission. He wishes to be there for Young Master Tony through all his trials. Even Jarvis underestimates the importance of a single man.

So this is a prompt that sort of exploded but the basic premise was Edwin Jarvis doesn't die and is there for Tony, Jarvis, realizing that Howard wouldn't always be able to keep up with Tony, and was often distracted, takes the experimental serum Howard was working on... If nothing else, he'd be sure that no one else ended up on the wrong side of it like Tony (or Bucky). The experiment is a success -- mostly. He now ages very slowly but as no one actually pays attention to the help, and can't really remember how old he really is... no one notices.