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Master Thesis

Impacts environnementaux des régimes dans Bionutrinet

Abstract : The objective of the present study was to investigate the relation between a provegetarian score and diet-related environmental impacts, and to assess a potential modulation by the organic food consumption. This study included 34.442 French adults from the Nutrinet-santé cohort. Food intake and ratio of organic food consumption were obtained using an organic food frequency questionnaire over the past year. To characterize the structure of the diets, a provegetarian score reflecting preferences to plant-based products was computed. Moreover, three environmental indicators were considered to evaluate diet-related environmental impacts: the greenhouse gases (GHG) emissions, the cumulative energy demand (CED) and the land occupation. Environmental impacts were assessed using life cycle analysis (LCA). Associations between quintiles of the provegetarian score (Q), the level of organic food consumption and the environmental indicators were analysed with ANCOVA adjusted for energy, sex, age. Higher provegetarian score was associated with lower environmental impacts (GHG emissionsQ5vsQ1=838/1664 kCO2eq/year, -49.6%, p<0.0001; CEDQ5vsQ1=4853/6775 MJ/year, -26.9%, p<0.0001; land occupation Q5vsQ1=2420/4138 m2/year, -41.5%, p<0.0001). Organic food consumption was also an important modulating factor on the relation between the environmental impacts and provegetarian patterns when the diet is rich in plant-based products. This work confirms that promotion and evaluation of the sustainability of the diet should encompass structure of the diet and mode of production.
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Master Thesis
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Camille Lacour. Impacts environnementaux des régimes dans Bionutrinet. Alimentation et Nutrition. 2017. ⟨dumas-01630965⟩

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