I am a former gym bro. I used to be obsessed with putting on muscle and managing my diet to supplement the heavy lifting I did at the gym. I would meticulously track the macronutrients for every bit of food I consumed throughout the day. 

When I looked at a plate of food, all I saw was the number of grams of protein it represented. I even went to the extent of staying up at night waiting for my dinner to digest so that I could stuff myself with high-protein, low-carb bread to hit my daily protein quota. If I failed to do that, I would berate myself and refuse to sleep.