Pulse Brain · Growing Health Evidence Index
Tier 3 — Observational / field trialPeer-reviewed

Nutritional quality of organic vs conventional tomatoes

Chassy, A.W. et al.

2006

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Summary

This peer-reviewed study published in the Journal of Agricultural and Food Chemistry examines whether organic production methods yield tomatoes with superior nutritional profiles compared to conventional cultivation. Drawing on analytical measurement of bioactive compounds, the paper contributes to an evidence base on how farming system influences phytochemical content in horticultural crops. Findings from papers of this type typically indicate modest but variable differences in specific antioxidant and flavonoid levels, though results are often confounded by cultivar, soil, and seasonal factors.

UK applicability

The study was conducted under US growing conditions, so direct transferability to UK horticulture is limited by differences in soil types, climate, and permitted agricultural inputs; however, the analytical framework and findings regarding production-system effects on phytochemical content are broadly relevant to UK debates on organic certification and nutrient density in domestically grown vegetables.

Key measures

Flavonoid concentration (mg/kg); vitamin C (ascorbic acid) content; lycopene concentration; total phenolics; Brix (soluble solids)

Outcomes reported

The study compared concentrations of key phytochemicals and nutrients — including flavonoids, vitamin C, and lycopene — in organically versus conventionally produced tomatoes. It assessed whether production system influenced nutritional composition at harvest.

Theme
Nutrition & health
Subject
Fruit & vegetables
Study type
Research
Study design
Field trial
Source type
Peer-reviewed study
Status
Published
Geography
United States
System type
Horticulture
Catalogue ID
XL0812

Topic tags

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