Current product databases answer what a label says now. Label Delta is built to answer what changed, when the source changed, and how strong the evidence is.
The ledger is generated from legally reusable source records with deterministic software. It is not a food-ranking service, a medical tool, or a guarantee that a recipe changed.
Why this exists
Ingredient, nutrition, serving, and package changes matter to shoppers, researchers, and journalists. Preserving them as structured before-and-after events makes those changes inspectable without relying on memory or marketing claims.