The definition given by Binstock for antiaging medicine is the following: "measures taken in order to slow, stop or even reverse phenomena related to aging, as well as to increase life span". 
At this point in time, we have two basic AntiAging Interventions:
In its broadest sense, "prevention" is anything that is done to counter the body's inexorable progressions toward disease and death.
Preventive medicine is the next great model of health care for the new millennium. It is the new health care paradigm. This model is based on the early detection, prevention, and even reversal of aging-related decline.
Aging, then, is considered a disease process. It can be accelerated, as occurs with smoking. It can be slowed down, and in some cases, it can be reversed. Many of the diseases of aging occur as hormones decline.
Although the advance of years causes hormones to decline, it is the loss of hormones which cause and accelerates many of the health deteriorating effects of aging.
So, appropriate supplementation of hormones, to youthful levels, coupled with lifestyle habits of diet and exercise will slow the aging process.
Most people do something to slow their own decline; they may "eat right", exercise, or take vitamins. They have the right idea, but their efforts are haphazard, and they are not really sure what it beneficial, and what is a waste of time and money. And, they may not comprehend the value of bioidentical hormone replacement therapy.
In its broadest sense, "rejuvenation" is anything that is done to reverse age-related damage.
The science of rejuvenation medicine is truly multidisciplinary. It is represented by advances in the fields of biochemistry, physiology, and surgery. The field is enhanced by contributions from mind/body medicine, sports medicine, genetics, stem cells, chelation therapy, and other emerging medical technologies.
Rejuvenation medicine is evidencedbased, clinically sound health care. Only those diagnostic and treatment elements which prove their validity through independent evaluations are embraced.
What Does This Mean For You?
By age 45, many people have some outward symptoms of aging which may include:
Wrinkles and sagging skin
Reduced sexual desire and ability
It is not uncommon that degenerative ailments such as heart disease, diabetes, and cancer surface by this time. By age 55, fewer can escape a body free from cancer, atherosclerosis, diabetes, or a combination of the above. These account for about 80% of age related degenerative diseases. Although these maladies are commonly accepted as the natural consequence of too many birthdays, most of health and longevity is related to lifestyle, and are therefore controllable.
Your rejuvenation program will involve testing of various hormone and nutrient levels, coaching regarding diet and nutritional supplementation, exercise, and bioidentical hormone supplementation. Weight loss may be considered as well as plastic surgery. Joint restoration using stem cells derived from your own body is an option. Stem cells may benefit other, systemic maladies as well.