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This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. For example, in cooking, recipes specify which ingredients are used to prepare a specific dish. Ingredient list on a can of marrowfat peas. National laws usually require prepared food products to display a list of ingredients, and specifically require that certain additives be listed.

In most developed countries, the law requires that ingredients be listed according to their relative weight in the product. The term constituent is often used to refer to substances that constitute the tissue of living beings. Thus all ingredients are constituents, but not all constituents are ingredients. Guidance for Industry: A Food Labeling Guide”.