Health
Late-night phone calls, bathroom bawling sessions, early-morning pick-ups, fights, alcohol, passive aggressive texts and so much more all come with toxic people.
You end up putting more energy into their lives than your own, and you get nothing in return.
As a result, you end up possibly not performing where you should be at work or not exercising as much as you originally wanted.
When you get rid of toxicity (whether that be toxic people or toxic foods), your body and mind begin to start focusing on bettering yourself.