Question 1

What is this useful for?

Accepted Answer

Seeing what an ingredient substitution actually costs nutritionally before you reformulate. Swapping one fat or one flour for another moves several nutrients at once, often in opposite directions, and a side-by-side view makes the trade visible rather than leaving it to be discovered on the finished panel.

Question 2

Should I compare per 100 g or per serving?

Accepted Answer

Per 100 g when comparing the foods themselves, because it removes serving size as a variable. Per serving when you want to know what someone actually gets. Comparisons that quietly switch basis between the two items are the most common way a nutrition comparison misleads.

Question 3

Does a better panel mean a better product?

Accepted Answer

Not on its own. Nutrition is one axis. Cost, functionality, shelf life, allergen status, supply reliability and how the product tastes all move when an ingredient changes, and a substitution that improves the panel while damaging texture is not usually a win. Use this to inform the decision, not to make it.

Question 4

Will the difference show on my label?

Accepted Answer

Only if it survives rounding. FDA rounding increments are coarse enough that a real difference in a minor nutrient can round to the same declared figure, while a small difference near a boundary can flip a value. Check the change against the rounding rules for the nutrients you care about before assuming the panel will move.

Outil de comparaison des aliments