The epic of Gilgamesh, one of the earliest known Sumerian texts, in the ninth and tenth tablets tells of Gilgamesh's fear of mortality after his friend dies, his realization that death resides within his body and all of mankind. He understands his imperfection with deep sadness, life is toil and grief, in which his final reward is death and that he will eventually lie down and turn to clay. Similarities to 'from dust you came and to dust you shall return' in the Genesis account and the Buddha’s first noble truth 'life means suffering' can be seen. His subsequent journey to see Utanapishtim and quest for eternal life is the first in a long line of interesting stories and legends on the search for life giving plants, trees, grails and fountains of youth.
In my opinion immortality is unrealistic however I believe prolonging life, prevention of disease and pushing life span limits is possible through good nutrition, clean living and further studies into the science behind longevity and how our bodies work.
On the subject of health and longevity Udo Erasmus states in his book Fats that Heal, Fats that Kill ‘We have little control over the biochemical processes that take place after we swallow, breathe in, or expose ourselves. We can choose what we swallow, breathe in, or expose ourselves to. Our health depends on our choices.’ He goes on to mention the 50 essential factors (of which about 46 are nutrients the others being energy, water, oxygen and light) that must come from our environment. These are factors that our bodies cannot manufacture but must have to live, function properly and be healthy. It is the quality and balance of each of these essential factors that determines optimum health. In addition to the physical components, physical activity and rest, emotional and mental states, and lifestyles and environments are also very important for health.
Some say Silicium could be the next break through in the longevity and anti-aging movement. The decrease in Silicium in the ageing of tissues (skin, joints, brain) is enormous, up to 80% from sexual maturity till death. These tissues more than any others undergo a gradual, constant and marked ageing process (wrinkles, softening of skin, loss of elasticity, loss of hydration). Silicium has also been linked to the prevention and treatment of degenerative neurological diseases like Parkinsons and Alzheimers and also Osteoporosis. The best sources of nutritional Silicium are whole grain cereals and edible fibers (soluble and insoluble). A special source is the Horsetail herb when harvested in the spring.