A Tel-Aviv University study that followed 820 adults for more than 20 years found that people who established relationships in their workplace enjoyed a longer life than those who didn’t. The reason seems to be that these friends form a safety net and provide social support even in a place that is considered to be competitive and stressful. The most disturbing finding was that people who established negative relationships in their workplace were 2.4 times more likely to die at a younger age.