Do you want to live a very long life? Well the key to this is to choose your parents wisely. Many scientists make this joke because living a very long time has a lot to do with your genetics. This means that certain families have many many people that live a very long time, while in other families very few people live to be such an old age.
However there is something you can do about it. Scientists have studied the lives of many people who have lived to be a hundred and they have found that they all have one similiarity They have all been happy. Their relationships with others was good and they were happy at their jobs. Scientists beileve the reason for this may be the effects that stress hormones have on the body, particularly on the immune system. Cortisone, one of the hormones, can suppress the immune system. and adrenalin, another hormone, will raise your blood pressure and put more of a burden on your heart.
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