Summary
This study analyses successive editions of UK food composition data spanning nearly eight decades to assess trends in the mineral content of commonly consumed fruit and vegetables. The authors identify widespread and substantial reductions in mineral concentrations across multiple food categories, raising concerns for the adequacy of mineral intake among UK populations relying on dietary guidelines based on older composition data. The paper situates these findings within the context of changes in agricultural practice, crop varieties, and soil health, suggesting systemic drivers worthy of further investigation.
UK applicability
The study is directly applicable to UK conditions, drawing exclusively on UK government food composition tables and focusing on produce consumed within the UK food supply. Its findings are particularly relevant to UK nutrition policy, agricultural research priorities, and debates around soil health and farming practice reform.
Key measures
Mineral concentrations (mg per 100g fresh weight) for calcium, magnesium, iron, copper, potassium, sodium, phosphorus, and zinc across fruit and vegetable categories; percentage change over time
Outcomes reported
The study reports changes in the concentrations of key minerals (such as calcium, magnesium, iron, copper, and potassium) in a range of fruit and vegetables recorded in UK food composition tables from 1940 to 2019. It documents substantial declines in multiple minerals across many crops over the study period.
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