Mo’ friends = mo’ problems
It’s already been established that the more Facebook friends you have, the more likely you are to feel stressed out (for various reasons). But a closer look at this phenomenon shows that this effect can have long-term consequences, especially for those who get hooked on friending at an early age.
Teenagers with more than 300 Facebook friends had higher levels of cortisol, a stress hormone. Over time, high cortisol levels can cause the brain to shrink, and reduce the number of new brain cells it makes, affecting concentration and decision-making over time.
So taking an axe to your friend list isn't just a good way to relax on a day-to-day level, but it could save you from serious consequences down the line.