by Lani Axman

Created on: November 30, 2007   Last Updated: February 02, 2012

Human myth and history are filled with the search for endless youth, the fountain of life, and immortality. Whether because of a survival instinct or fear of death, we're keen to discover the way to a lengthened lifespan. Though there is always a risk of death through accidents or tragic events, there are certainly ways to delay death by natural causes.

Most of us are aware of the basic requirements for long life: don't smoke, stay fit, and eat lots of fruits and vegetables. The basics aren't a secret, but here are some lesser-known ways you can be proactive in extending your life and happiness.

1. Get adequate high-quality sleep.

We all know sleep is important, but research has also shown that getting enough good sleep can extend your life. Individuals who experience problems falling asleep or maintaining the ideal amount of REM sleep are at risk of dying earlier than those who don't experience these difficulties. If you are experiencing sleep difficulties, making an effort to remedy them could add years to your lifespan.

2. Get plenty of vitamin D.

Numerous studies have indicated that vitamin D intake is associated with lower risk of death from any disease (including cancer). Most studies are conducted with older adults taking vitamin D supplements and clearly demonstrate vitamin D's capacity to prolong life. Fortunately, we have a ready-made source of vitamin D in sunlight. Getting safe sunlight exposure is one of the easiest ways to increase your vitamin D levels, and the vitamin D produced in our bodies through sunlight carries no risk of overdose. Sunscreen will block the UV rays necessary to promote vitamin D production, so be sure to get some unfiltered sunlight on your bare skin everyday.

3. Limit your brain's exposure to insulin.

Laboratory research has demonstrated that mice with reduced brain insulin signaling live 18% longer and are more youthful and active than ordinary lab mice. What's the best way to reduce the amount of insulin your brain is bombarded with? Though every person's insulin response is slightly different, in general, the more refined the carbohydrates, the stronger and faster your body's insulin response will be. The health problems associated with excessive sugar and refined carbohydrates are well documented. One of the best things you can do for your health is limit your intake of refined carbs such as sugar, high fructose corn syrup, white breads and pastas, etc. Choose whole grain carbohydrates and balance each meal with protein,

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