Greetings fine people!

Doing a reread of SG and just hit the standoff outside the Carpenter house.  While Nicodemus is tempting Murph he lays down his coin and the noose, which I assume leaves him a vanilla mortal? 

Curious why he wouldn't age and decompose like the older half-reds in Changes. Maybe the coins press pause on the aging process and the vamp power kept the body young and functioning?  Maybe Nic has some additional "mortal plus" power I've overlooked or was this just one of those things to move the story along?