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Updated: May 8, 2026
10:22
Improved UPLC-UV Method for the Quantification of Vitamin C in Lettuce Varieties (Lactuca sativa L.) and Crop Wild Relatives (Lactuca spp.)
Published on: June 30, 2020
Summary
Vitamin C content in fruits and vegetables has remained stable over time, contrary to popular belief. Successful crop selection has maintained vitamin levels despite farming changes.
Area of Science:
- Nutritional Science
- Agricultural Science
- Food Chemistry
Context:
- Concerns exist regarding potential declines in vitamin C (ascorbic acid) in produce due to intensive agriculture and soil degradation.
- Historical data on vitamin C content in fruits and vegetables is crucial for understanding nutritional trends.
Purpose:
- To analyze changes in vitamin C content in common fruits and vegetables from the 1940s to the present day.
- To evaluate the validity of claims that intensive farming practices have reduced vitamin C levels in produce.
Summary:
- Analysis of data from 32 vegetables and 24 fruits across numerous studies revealed minimal variation in average vitamin C content over decades.
- Longitudinal data analysis did not support a decrease in vitamin C; deviations remained within standard deviation.
- Newer cultivars, selected for enhanced vitamin content, have maintained overall vitamin C levels in produce.
Impact:
- The study refutes the notion that vitamin C content in fruits and vegetables has declined.
- Findings suggest that agricultural selection practices have successfully preserved or increased vitamin C levels in produce.
- Provides evidence-based insights for consumers and the agricultural industry regarding produce nutrition.
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