Partitioning of animals in stock and other animal foodstuff into products and by-products. Legend: This figure illustrates the partitioning of the 12 initial livestock products into products and by-products to allow the estimates of Functional Elements Production and Utility. The number of the livestock product is accompanied with a prefix-number to allow the identification of the by-products originated from it. Once the model considers that all livestock products are essentially allocated to food for humans, the estimates of Functional Elements Production and Utility are based on the same livestock products or by-products. For example, the livestock product named “Cattle” is accompanied by the prefix-number 1 in the left panel. In the middle panel, it is possible to see the by-product originated from it (“1. Cattle carcass”), which is used for the estimates of Functional Elements Production. In the right panel, the same by-product is considered for the estimates of Functional Elements Utility(“1. Cattle carcass”). DOI: https://doi.org/10.1525/elementa.187.f3