Not sure of the formula, but it would be a metric that ignores "processing" or "unnatural" ingredients and somehow scores for high calories in absence of fiber or protein.
Examples:
Apple juice: sugar calories without fiber or protein = bad
Apples: sugar calories, but has fiber = OK
Potato chips: fat and carb calories without fiber or protein = bad
Baked potato with butter: fat and carb calories, but has fiber = OK
Not sure of the formula, but it would be a metric that ignores "processing" or "unnatural" ingredients and somehow scores for high calories in absence of fiber or protein.
Examples: Apple juice: sugar calories without fiber or protein = bad
Apples: sugar calories, but has fiber = OK
Potato chips: fat and carb calories without fiber or protein = bad
Baked potato with butter: fat and carb calories, but has fiber = OK