This sort of story smacks of "Nutritionism" as explained in Michael Pollan's book 'In Defense Of Food'. Generally people do not need to know how many calories, carbs, nutrients, vitamins, etc. are in a piece of food unless you are a nutritionist, and most people aren't. How to eat healthy comes down to one simple rule:
Eat food(1) mostly plants(2) not too much(3).
(1) Food defined by things your great-grandmother would recognize as being food. Nothing overly processed. Food should spoil. If what you eat will not spoil you should not eat it. Things that are not food, but edible food-type substances: refined sugar (includes soda, twinkies, etc), refined flour (white bread, etc), refined oils of all kinds (peanut oil, sunflower oil, and *gasp* olive oil).
(2) Plants, meaning whole fruits, vegetables, nuts, and legumes. And a variety. Different shapes, textures, colors, whole and fresh if you can get it. This should make up 90% of your diet. Less than 10% of your diet should come from animal products. This includes dairy and meat.
(3) Don't eat too much of one thing. Don't overeat.
If you do this, you don't need to count calories or take vitamins or worry about your riboflavin intake. Just eat and be healthy.