There are several other theories and schools of thought regarding aging. Some of these are discussed below.
The Wear and Tear Theory of Aging
According to this theory, cells and tissues undergo wear and tear — just like the parts of an automobile. Car parts need replacement when they are worn out. While cells, tissues and organs have the capacity to regenerate, over time, this regeneration capacity decreases. Thus, the body is unable to repair itself and begins to ‘age’.
The Free Radical Theory
According to this theory, cells age because they begin to accumulate negatively-charged free radicals. Pesticides, substance abuse, junk food, etc, contribute to increased formation of free radicals in the body. These free radicals undergo oxidation and cause cell damage. Fresh veggies, fruits, green tea, etc, help to slow down aging because they contain substances known as ‘anti-oxidants’.
The Genetic Control Theory
This theory proposes that aging is controlled by genes that are inherited from parents. According to this theory, the lifespan of an individual is determined at the time of conception.
The Hormonal Theory
Important processes in the body are regulated by hormones. The production of hormones declines with age, leading to changes such as menopause, loss of muscle mass, poor cognition, etc.
Let us now come to developments in the field of anti-aging.