It is for now, Aging is considered a degradation of our cells over time and this starts to happen as you get older because as you grown older your cells start reaching a point where they can't properly duplicate themselves anymore, this is what starts the aging process but this is also the reason to why there could be a way to prevent aging all together, If we manage to find a way to heal cells or to help them keep duplicating forever you would have essentially killed aging but of course this wouldn't make you immortal since you could still suffer from diseases like cancer or you could get killed in an accident or something!