Risks of too little sodium are a valid concern only at levels massively below mean intake in the U.S., while the harms of excess are with us right now. The priority, obviously, is fixing what's broken. Kudos to the FDA. Their action on salt does not yet have traction in the real world -- but it does pertain to it.
We have been preoccupied with anti-aging perhaps since the very dawn of self-awareness, and the implications of mortality it unveiled. We have, ever since, tethered our fears to faith and fantasy, tangled our aspirations up in fable -- about fountains of youth in particular.