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A literature‐based comparison of nutrient and contaminant contents between organic and conventional vegetables and potatoes

A literature‐based comparison of nutrient and contaminant contents between organic and... Purpose – The increasing demand for organic foods is explained mainly by consumers' concerns about the quality and safety of foods and their perception that organically produced foods are healthier and safer than conventional foods. Based on internationally available concentration data of organic and conventional vegetables (carrots, tomatoes, lettuce and spinach) and potatoes, the paper aims to investigate the scientific validity of nutrition claims as “no vegetable/potato has higher amounts of nutrient X than organic vegetables/potatoes” and “no vegetable/potato has lower amounts of contaminant Y than organic vegetables/potatoes”. Design/methodology/approach – Detailed nutrient and contaminant databases were developed for organic and conventional vegetables separately. Non‐parametric (Mann‐Whitney test) methods were used to detect significant differences between both types of vegetables. A chi‐square test was used to compare the incidence of pesticide residues in organic and conventional vegetables. Findings – From a nutritional and toxicological point of view, organic vegetables and potato in general are not significantly better than conventional vegetables and potatoes. For some nutrients and contaminants organic vegetables and potatoes score significantly better but for others they score significantly worse. Therefore, it becomes difficult to justify general claims indicating a surplus value of organic over conventional vegetables and potatoes. More data from controlled paired studies are needed to reconsider the use of claims for these organic plant foods in the future. Research limitations/implications – Only a limited number of studies comparing the nutrient and/or contaminant concentration of organic and conventional vegetables are available (“paired studies”). Additionally, the majority of the studies are of moderate or poor quality. The implication is that more of those paired studies are heavily needed. Another limitation of the study is the fact that most pesticide residue data originated from the USA, the EU and Australia. Originality/value – So far only few studies compared both nutrient and contaminant contents between organic and conventional plant foods. This paper covers therefore an important, not well‐explored research sub area. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png British Food Journal Emerald Publishing

A literature‐based comparison of nutrient and contaminant contents between organic and conventional vegetables and potatoes

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Publisher
Emerald Publishing
Copyright
Copyright © 2009 Emerald Group Publishing Limited. All rights reserved.
ISSN
0007-070X
DOI
10.1108/00070700910992934
Publisher site
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Abstract

Purpose – The increasing demand for organic foods is explained mainly by consumers' concerns about the quality and safety of foods and their perception that organically produced foods are healthier and safer than conventional foods. Based on internationally available concentration data of organic and conventional vegetables (carrots, tomatoes, lettuce and spinach) and potatoes, the paper aims to investigate the scientific validity of nutrition claims as “no vegetable/potato has higher amounts of nutrient X than organic vegetables/potatoes” and “no vegetable/potato has lower amounts of contaminant Y than organic vegetables/potatoes”. Design/methodology/approach – Detailed nutrient and contaminant databases were developed for organic and conventional vegetables separately. Non‐parametric (Mann‐Whitney test) methods were used to detect significant differences between both types of vegetables. A chi‐square test was used to compare the incidence of pesticide residues in organic and conventional vegetables. Findings – From a nutritional and toxicological point of view, organic vegetables and potato in general are not significantly better than conventional vegetables and potatoes. For some nutrients and contaminants organic vegetables and potatoes score significantly better but for others they score significantly worse. Therefore, it becomes difficult to justify general claims indicating a surplus value of organic over conventional vegetables and potatoes. More data from controlled paired studies are needed to reconsider the use of claims for these organic plant foods in the future. Research limitations/implications – Only a limited number of studies comparing the nutrient and/or contaminant concentration of organic and conventional vegetables are available (“paired studies”). Additionally, the majority of the studies are of moderate or poor quality. The implication is that more of those paired studies are heavily needed. Another limitation of the study is the fact that most pesticide residue data originated from the USA, the EU and Australia. Originality/value – So far only few studies compared both nutrient and contaminant contents between organic and conventional plant foods. This paper covers therefore an important, not well‐explored research sub area.

Journal

British Food Journal – Emerald Publishing

Published: Sep 26, 2009

Keywords: Organic foods; Vegetables; Agricultural products; Contamination; Nutrition; Consumer psychology

References

  • Nevo‐tabel
    Beemster, C.J.M.; van der Heijden, L.J.M.; Hulshof, K.F.A.M.; Langius, J.A.E.; van Oosten, H.M.; Pruissen‐Boskaljon, J.C.; Westenbrink, S.
  • Organic and Conventional Food: A Literature Review of the Economics of Consumer Perceptions and Preferences
    Bonti‐Ankomah, S.; Yiridoe, E.K.
  • A comparison of the nutritional value, sensory qualities, and food safety of organically and conventionally produced foods
    Bourn, D.; Prescott, J.
  • Organic agriculture: does it enhance or reduce the nutritional value of plant foods?
    Brandt, K.; Molgaard, J.P.
  • Danish Food Composition Databank (revision 6.0)
    Danish Institute for Food and Veterinary Research
  • Ecological and food safety considerations in products of plant‐origin
    Dedaza, M.S.T.; Diaz, R.V.
  • Commission Regulation No. 2092/91 of 24 June 1991 on organic production of agricultural products and indications referring thereto on agricultural products and foodstuffs
    European Communities (EC)
  • Report on organic farming in the European Union: facts and figures
    European Commission (EC)
  • Organic agriculture
    Food and Agriculture Organisation (FAO)
  • Canadian Nutrient File (Version 2006)
    Health Canada
  • Development of vegetable composition databases based on available data for probabilistic nutrient and contaminant intake assessments
    Hoefkens, C.; Sioen, I.; De Henauw, S.; Vandekinderen, I.; Baert, K.; De Meulenaer, B.; Devlieghere, F.; Van Camp, J.
  • Organic Farming, Food Quality and Human Health: A Review of the Evidence
    Holden, P.
  • Fruit and vegetable intake and risk of major chronic disease
    Hung, H.C.; Joshipura, K.J.; Jiang, R.; Hu, F.B.; Hunter, D.; Smith‐Warner, S.A.; Colditz, G.A.; Rosner, B.; Spiegelman, D.; Willett, W.C.
  • Putting the safety of organic food into perspective
    Magkos, F.; Arvaniti, F.; Zampelas, A.
  • Organic food: buying more safety or just peace of mind? A critical review of the literature
    Magkos, F.; Arvaniti, F.; Zampelas, A.
  • Contaminants in organic and conventional foodstuffs in France
    Malmauret, L.; Parent‐Massin, D.; Hardy, J.‐L.; Verger, P.
  • Statistics of Agriculture and Biological Agriculture
    National Institute of Statistics (NIS)
  • Finnish Food Composition Database
    National Public Health Institute of Finland
  • Organic farming as a system to provide better vegetable quality
    Rembialkowska, E.
  • Quality of plant products from organic agriculture
    Rembialkowska, E.
  • Epidemiologic evidence of the protective effect of fruits and vegetables on cancer risk
    Riboli, E.; Norat, T.
  • Development of a nutrient database and distributions for use in a probabilistic risk‐benefit analysis of human seafood consumption
    Sioen, I.; De Henauw, S.; Verdonck, F.; Van Thuyne, N.; Van Camp, J.
  • How to use secondary data on seafood contamination for probabilistic exposure assessment purposes? Main problems and potential solutions
    Sioen, I.; Van Camp, J.; Verdonck, F.A.M.; Van Thuyne, N.; Willems, J.L.; De Henauw, S.W.J.
  • Food composition and nutrition tables
    Souci, S.W.; Fachmann, W.; Kraut, H.
  • USDA National Nutrient Database for Standard Reference
    US Department of Agriculture, Agricultural Research Service
  • Assigning Values to Non‐Detected/non‐quantified Pesticide Residues in Human Health Food Exposure Assessments
    US Environmental Protection Agency (US EPA)
  • Merknamendatabank
    VZW NUBEL
  • Perceived risks of conventional and organic produce: pesticides, pathogens and natural toxins
    Williams, P.R.D.; Hammitt, J.K.
  • A comparison of organically and conventionally grown foods – results of a review of the relevant literature
    Woese, K.; Lange, D.; Boess, C.; Bögl, K.W.
  • Effect of agricultural methods on nutritional quality: a comparison of organic with conventional crops
    Worthington, V.
  • Nutritional quality of organic versus conventional fruits, vegetables and grains
    Worthington, V.
  • Does organic production enhance phytochemical content of fruit and vegetables? Current knowledge and prospects for research
    Zhao, X.; Carey, E.E.; Wang, W.Q.; Rajashekar, C.B.