Ion channels are also a hyper-conserved mechanism as every cell needs to maintain a resting potential, and there are tons of ion channel modulating drugs approved and used messing with the with billion years old hyper-conserved mechanism.

I heard about NAD+ on Dave Asprey podcast, that with age the NAD cleavage system cleaving NAD excess is also degraded and a Nuchido company makes this supplement with additives targeting NAD cleavage system restore as well.