Is a healthy diet an environmentally sustainable diet?

Jennie I. Macdiarmid*

*Corresponding author for this work

Research output: Contribution to journalArticle

89 Citations (Scopus)
7 Downloads (Pure)

Abstract

The concept of a healthy and environmentally sustainable diet is not new, but with increasing concern about future global food security and climate change there is a renewed interest in this topic. Dietary intakes in UK accounts for approximately 20-30% of total annual greenhouse gas emissions (GHGE), with the greatest contributions coming from high intakes of meat and dairy products. Dietary proposals to help mitigate climate change (i.e. reduce GHGE) have focused on reducing consumption of meat and dairy products, but this must be considered in the context of the whole diet, alongside any possible nutritional consequences for health. Bringing together health and environmental impact of the diet raises the question of whether a healthy diet can also be an environmentally sustainable diet. While recent research showed that it is possible to achieve a realistic diet that meets dietary requirement for health and has lower GHGE, it cannot be assumed that a healthy diet will always have lower GHGE. With different combinations of food it is possible to consume a diet that meets dietary requirements for health, but has high GHGE. It is important to understand what constitutes a sustainable diet, but this then needs to be communicated effectively to try and change well-established dietary intakes of the population. Studies show that understanding of sustainable diets is poor and there are many misconceptions (e. g. the overestimation of the protein requirements for a healthy diet), which could contribute to the barriers towards changing dietary intakes.

Original languageEnglish
Pages (from-to)13-20
Number of pages8
JournalProceedings of the Nutrition Society
Volume72
Issue number1
Early online date28 Nov 2012
DOIs
Publication statusPublished - Feb 2013

Keywords

  • dietary requirements
  • health
  • greenhouse gas emissions
  • sustainable diets
  • greenhouse-gas emissions
  • climate-change
  • food
  • consumption
  • behaviors
  • meat

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