Your diet is not just what you eat or drink.
It's also:
What you read and watch
The information you consume
The people you let into your life
The conversations you engage in
The energy surrounding you
The environments you spend time in
The thoughts you entertain
The activities you participate in
All of these elements nourish your mind, body, and spirit. These broader "dietary" choices shape your mental and emotional well-being.
If you surround yourself with trash, it will slowly but surely impact who you become.