Sleep, dhea etc.

Highlight from the link, for the lazy ones;)

"Our thymus gland, which is responsible for the production of T-cells, begins to shrink after we reach adulthood. One study now indicates that DHEA slows the rate of shrinkage. If more confirming evidence for that is found, then DHEA will fall into place alongside HGH and melatonin as a vital trio geared toward protecting the single most important organ of the immune system."

"There is a breed of rabbit called the New Zealand White that has been used in cardiovascular research since 1914. It inherits the trait of extremely high cholesterol levels and consequently tends to rapidly form arterial plaque and die of narrowing of the arteries. Scientists at Johns Hopkins took twenty of these New Zealand Whites and, using catheters, caused slight irritations to the intima (the inner-most lining) of the aorta in order to even further promote plaque formation. Some of the rabbits then received DHEA in their chow over the next three months, while the rest did not. In those receiving DHEA, there was an almost 50 percent reduction in plaque size, and the degree of protection was directly related to the final blood level of DHEA achieved."

"Poorer memory in old age is one of the similarities of mice and men. Therefore, it's encouraging to report that old mice given DHEA in the course of training improved their ability to remember until they were almost as efficient at it as young mice. Memory difficulty is an aspect of aging that has been extremely hard to change positively." Tweet