Not only years, but quality in those years. In Brave New World, Huxley talked about sex-hormone chewing gum, among other things, as a commonality in his dystopia where no one aged, right up until they died. I suspect we'll have quite a while where at least a portion of humanity lives like this, and I wouldn't be surprised to see food with intentional hormonal additives within the next few years. We already have labels on our food telling us about its health benefits or 'health benefits,' how long until we're exactly formulating the composition of our bodies? We'll live in near perfect physical/mental health, until the Hayflick limit takes us. (And if Aubrey de Grey gets his way, we'll do away with the Hayflick limit too) Better living through chemistry, we're all just olympians in the making.