A gene has been discovered that helps determine the life-span of the fruit fly Drosophila. When the gene is mutated (altered), it can extend the life-span of fruit flies. It doubles their life-span. The gene has been named Indy (for I'm not dead yet). It appears that the protein encoded by this gene transports and recycles metabolic byproducts. Defects in the gene may lead to production of a protein that renders metabolism less efficient so that its body functions as if the fruit fly were dieting, even though its eating habits are unchanged.

The list of complications that have been mentioned in various sources for Aging includes:

Cataracts
Glaucoma

Strong physique: powerful muscles, tendons and bones ensure mobility, agility and flexibility, a strong physique indicates that every part of the body is in an optimum state.

Sharp eyes: TCM claims that the eyes are one of the gathering places for the organs' essence and qi (vital energy) to meet, so expression in the eyes naturally reflect the functional states of internal organs; bright and piercing eyes are the prime expression of good health. Furthermore, the eyes are regarded as the openings of the liver in the body surface; good vision reflects the liver functioning properly.

Good complexion: the face is regarded as the outer manifestation of internal organs especially for the heart; a pink and radiant complexion means the body's blood and qi circulations are smooth.

Healthy looking skin and hair: these indicate that the body has sufficient blood and qi (vital energy) to nourish them.

Quiet and steady breathing: TCM believes that the heart and lungs are responsible for exhalation, while the liver and kidneys are responsible for inhalation. Smooth respiratory movements result from close coordination of these organs.

Besides,it is better to prevent aging combined with the herbal medicine and the diet.