 I kind of just know my body, figured it out, and I'm very comfortable with knowing what goes in and out of my body. But for people who don't know and don't know their baseline of their calories, don't know their baseline of what food treats them better than other foods, using fitness apps and tracking what you intake, what makes you feel good, what drains you, what gives you more energy in the gym, what gives you a better pump in the gym,