There's a great documentary by Russell Brand (From Addiction to Recovery, it's on Netflix) where he visits a neurological research facility in Britain where the

There's a great documentary by Russell Brand (From Addiction to Recovery, it's on Netflix) where he visits a neurological research facility in Britain where they've seen pretty clear evidence that a percentage of the population are more prone to become addicted; to anything that is. They are the kinds of people who could get addicted to Instagram due to the dopamine hit.