You
Protein is set from lean mass. Your waist and height give a body fat estimate (relative fat mass; typically off by several points, and a pant tag reads about an inch small, which is corrected). Blank uses a weaker estimate from height and weight.
Diet
Filters apply to every food. A food you add below that matches one is left out and the plan says so.
Foods you like
The plan leans toward these and fills nutrient gaps with staples (eggs, salmon, oats, beans, vegetables, fruit…).