James William H M, Lomax Nik, Birkin Mark, Collins Lisa M
School of Geography and Leeds Institute for Data Analytics, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, West Yorkshire, UK.
Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, West Yorkshire, UK.
BMC Nutr. 2022 Aug 16;8(1):80. doi: 10.1186/s40795-022-00570-3.
There are a range of policies and guidelines focused on meat consumption which aim to tackle health and environmental issues. Policies are often siloed in nature and propose universal limits on consumption. Despite this, there will be a number of conflicts and trade-offs between interest groups. This study explores secondary impacts associated with guidelines issued by the World Cancer Research Fund and assesses the utility of a targeted policy intervention strategy for reducing red meat consumption.
We used highly detailed consumption data of over 5,000 individuals from the National Diet and Nutrition Survey. We firstly compared individual consumption against the policy guidelines to identify demographic groups most likely to consume above recommended levels. We then synthetically modified the food diary data to investigate the secondary impacts of adherence to the recommendations by all individuals. We assessed changes in overall consumption, nutrient intake (iron, zinc, vitamin B12, vitamin B3, fat and saturated fat) and global warming potential. We also projected future impacts under various population projections.
We found that certain demographic groups are much more likely to exceed the recommendations and would therefore benefit from a targeted intervention approach. Our results provide a baseline for which the impacts of any meat substitute diets can be assessed against. Whilst secondary health benefits may be realised by reducing intake of certain nutrients (e.g. fats), negative impacts may occur due to the reduced intake of other nutrients (e.g. iron, zinc). Reduced overall consumption is likely to have implications for the wider meat industry whilst complementary impacts would occur in terms of reduced greenhouse gas emissions. Impacts will be counteracted or maybe even reversed by any substitute products, highlighting the need to carefully consider the suitability and impacts of meat-replacements.
The future structure of the meat industry will depend on how conflicts and trade-offs are addressed and how more holistic policy ideas are implemented. This research provides a framework for using demographic and consumption data to reduce negative trade-offs and improve policy effectiveness.
有一系列针对肉类消费的政策和指南,旨在解决健康和环境问题。这些政策在本质上往往相互孤立,并且提议对消费进行普遍限制。尽管如此,利益集团之间仍会存在一些冲突和权衡。本研究探讨了与世界癌症研究基金会发布的指南相关的次要影响,并评估了有针对性的政策干预策略在减少红肉消费方面的效用。
我们使用了来自国家饮食与营养调查的5000多名个体的高度详细的消费数据。我们首先将个体消费与政策指南进行比较,以确定最有可能消费超过推荐水平的人口群体。然后,我们综合修改食物日记数据,以调查所有人遵守这些建议的次要影响。我们评估了总体消费、营养素摄入量(铁、锌、维生素B12、维生素B3、脂肪和饱和脂肪)以及全球变暖潜能的变化。我们还在各种人口预测下预测了未来的影响。
我们发现某些人口群体更有可能超过建议水平,因此将从有针对性的干预方法中受益。我们的结果提供了一个基线,据此可以评估任何肉类替代饮食的影响。虽然减少某些营养素(如脂肪)的摄入量可能会带来次要的健康益处,但由于其他营养素(如铁、锌)摄入量的减少,可能会产生负面影响。总体消费的减少可能会对更广泛的肉类行业产生影响,同时在减少温室气体排放方面会产生互补影响。任何替代产品都可能抵消甚至扭转这些影响,这突出了仔细考虑肉类替代品的适用性和影响的必要性。
肉类行业的未来结构将取决于如何解决冲突和权衡,以及如何实施更全面的政策理念。本研究提供了一个框架,用于利用人口和消费数据减少负面权衡并提高政策有效性。