van Selm Benjamin, Frehner Anita, de Boer Imke J M, van Hal Ollie, Hijbeek Renske, van Ittersum Martin K, Talsma Elise F, Lesschen Jan Peter, Hendriks Chantal M J, Herrero Mario, van Zanten Hannah H E
Animal Production Systems Group, Wageningen University & Research, Wageningen, Netherlands.
Plant Production Systems Group, Wageningen University & Research, Wageningen, Netherlands.
Nat Food. 2022 Jan;3(1):66-73. doi: 10.1038/s43016-021-00425-3. Epub 2022 Jan 6.
It is not known whether dietary guidelines proposing a limited intake of animal protein are compatible with the adoption of circular food systems. Using a resource-allocation model, we compared the effects of circularity on the supply of animal-source nutrients in Europe with the nutritional requirements of the EAT-Lancet reference diet. We found the two to be compatible in terms of total animal-source proteins but not specific animal-source foods; in particular, the EAT-Lancet guidelines recommend larger quantities of poultry meat over beef and pork, while a circular food system produces mainly milk, dairy-beef and pork. Compared with the EAT-Lancet reference diet, greenhouse gas emissions were reduced by up to 31% and arable land use reduced by up to 42%. Careful consideration of the feasible substitutability between animal-source foods is needed to define potential roles of animal products in circular human diets.
目前尚不清楚，建议限制动物蛋白摄入量的饮食指南是否与采用循环食品系统相兼容。我们使用资源分配模型，将欧洲循环性对动物源营养供应的影响与EAT-柳叶刀参考饮食的营养需求进行了比较。我们发现，就动物源蛋白质总量而言，二者是兼容的，但在特定动物源食物方面并非如此；特别是，EAT-柳叶刀指南建议摄入的禽肉量多于牛肉和猪肉，而循环食品系统主要生产牛奶、奶牛肉和猪肉。与EAT-柳叶刀参考饮食相比，温室气体排放量最多减少了31%，耕地使用量最多减少了42%。需要仔细考虑动物源食物之间可行的可替代性，以确定动物产品在循环人类饮食中的潜在作用。
