Also some folks are just smaller than others.
replyThey do try to account for this in their method. Men, women, and children of different ages all have different amounts of assumed food intake
replyMostly what the typical nutritional guidance has advocated consistently over the last few decades, with maybe slightly higher protein intake.
reply6-8 servings of fruits and vegetables a day, fairly liberal amounts of dairy and lean protein, lesser amounts of red meat. Grains like breads/rice for additional carbohydrates.
Admittedly, avoiding eating out regularly is the #1 way I keep food costs down, though.