For men and women heading into their forties and fifties, the authors cannot help but feel that the results will be even more amazing yet.

In most of these people, the aging process is just beginning to make itself felt, the decay has not gone that far yet. Here, HGH can counter the aging process early in its evolution, before the decay has become fully entrenched.

You might liken it to getting to a dentist before the cavity in the tooth has decayed too much of it. When the cavity is caught and filled early on, the tooth will be strong and will last a long time. But when the tooth is drilled and filled only after the cavity has rotted half the tooth, that tooth will probably not last nearly so long.

So, for people in their 40's and 50's, even many in their 60's, the evidence so far suggests to us that HGH replacement can add a decade or two - perhaps even more - to the expected life span.

And we are not talking about merely being alive, merely existing, trying to find a hot tub with still more jets. We are talking about these extra years, these extra decades being filled with wellness, with energy, with activity.

When you add antioxidants to the picture, the prospects become even brighter.

When you then add a pattern of sensible eating habits, and throw in a 30 minute session of exercise done about 3 times a week, then we think that adding an extra 30 years of reasonably healthy living to the expected life span is perhaps even something of a conservative estimate.