Effects of Agricultural Intensification on Mediterranean Diets: A Narrative Review

Area of Science:

• Nutritional Science
• Agricultural Science
• Environmental Science

Background:

• Mediterranean diets (MedDiets) are associated with significant health advantages.
• Agricultural intensification over the past 60 years has altered food composition, potentially affecting MedDiet benefits.

Purpose of the Study:

• To review and evaluate evidence on how agricultural intensification changes food composition.
• To assess the impact of these changes on the health benefits of MedDiets.

Main Methods:

• Systematic literature reviews and meta-analyses on conventional vs. organic food composition.
• Analysis of food composition data before and after agricultural intensification.
• Examination of studies on agronomic practices and their effects on food nutrients.
• Review of observational and intervention studies on health impacts of intensified food production.

Main Results:

• Intensified production lowered beneficial compounds (phenolics, vitamins, minerals, omega-3s) and increased undesirable ones (pesticides, cadmium, omega-6s).
• Affected foods include cereals, fruits, vegetables, olive oil, dairy, meat, and fish.
• Evidence suggests negative health impacts from intensified food consumption, though primarily from observational data.

Conclusions:

• Substantial evidence indicates reduced nutritional quality in foods contributing to MedDiet health benefits due to agricultural intensification.
• Further research is required to quantify the extent to which this impacts MedDiet's positive health outcomes.