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Vitamin C and carotenoids in organic and conventional fruits grown in Brazil

Cardoso, Pollyanna C., Tomazini, Ana Paula B., Stringheta, Paulo C., Ribeiro, Sônia M.R., Pinheiro-Sant’Ana, Helena M.
Food chemistry 2011 v.126 no.2 pp. 411-416
ascorbic acid, dehydroascorbic acid, fruit growing, fruits, high performance liquid chromatography, lycopene, organic production, persimmons, production technology, strawberries, Brazil
This study compared the concentration of vitamin C (ascorbic acid, AA, and dehydroascorbic acid, DHA) and carotenoids (lycopene and β-carotene) between three fruits produced by organic and conventional farming. Vitamin C and carotenoids were analysed by high-performance liquid chromatography. The Student t-test (α=5%) was applied to determine differences between the organic and conventional production systems. AA content was significantly higher in organic acerola (4023.39mg/100g) compared to its conventional production (2294.53mg/100g). Conversely, AA content was significantly higher in conventional strawberries (42.45mg/100g) than the organic ones (30.74mg/100g). The conventional production also showed significantly higher contents of DHA (persimmon: 7.50mg/100g vs. 0.96mg/100g) and β-carotene (acerola: 6130.24μg/100g vs. 2486.38μg/100g) than the organic fruits. Lycopene was only detected in persimmons, but no significant difference was observed between farming systems. There was no evidence of the nutritional superiority of the organically grown fruits.