Comparison of nutritional quality between conventional and organic dairy products: A meta-analysis

Article (PDF Available)inJournal of the Science of Food and Agriculture 92(14):2774-81 · November 2012with333 Reads
DOI: 10.1002/jsfa.5639 · Source: PubMed
As a contribution to the debate on the comparison of nutritional quality between conventional versus organic products, the present study would like to provide new results on this issue specifically on dairy products by integrating the last 3 years' studies using a meta-analysis approach with Hedges' d effect size method. The current meta-analysis shows that organic dairy products contain significantly higher protein, ALA, total omega-3 fatty acid, cis-9,trans-11 conjugated linoleic acid, trans-11 vaccenic acid, eicosapentanoic acid, and docosapentanoic acid than those of conventional types, with cumulative effect size ( ± 95% confidence interval) of 0.56 ± 0.24, 1.74 ± 0.16, 0.84 ± 0.14, 0.68 ± 0.13, 0.51 ± 0.16, 0.42 ± 0.23, and 0.71 ± 0.3, respectively. It is also observed that organic dairy products have significantly (P < 0.001) higher omega-3 to -6 ratio (0.42 vs. 0.23) and Δ9-desaturase index (0.28 vs. 0.27) than the conventional types. The current regulation on organic farming indeed drives organic farms to production of organic dairy products with different nutritional qualities from conventional ones. The differences in feeding regime between conventional and organic dairy production is suspected as the reason behind this evidence. Further identical meta-analysis may be best applicable for summarizing a comparison between conventional and organic foodstuffs for other aspects and food categories. Copyright © 2012 Society of Chemical Industry.


    • "Elevated Cd is associated with contamination of mineral-based fertilizers such as KCl. Palupi et al. (2012) limit their attention to animal products for which more consistent differences are seen for animals produced on grass (required for organic certification). Further five review articles concluded that the evidence was insufficient to draw firm conclusions (Brandt and Mølgaard, 2001; Bourn and Prescott, 2002; Magkos et al., 2006; Winter and Davis, 2006; Johansson et al., 2014). "
    [Show abstract] [Hide abstract] ABSTRACT: That the health of soils, plants, animals, and people are linked is an ancient idea that still resonates. Growing evidence links farm management, soil health, and plant health but relationships among soil health, food crop nutritional quality, and human health are less understood. Numerous studies compare organic with conventional farming in order to shed light on these links. Organic farming systems utilize carbon-based amendments, diverse crop rotations, and cover crops to build soil fertility. These practices increase biologically available soil organic matter and beneficial soil microbe and invertebrate activities, improve soil physical properties, reduce disease potential, and increase plant health. To date, comparisons of nutrient content between organic and conventional foods have been inconsistent. Recent evidence suggests that organically grown fruits and vegetables contain higher levels of health promoting phytochemicals, possibly linked to greater plant stress, rhizosphere microbial communities, and/or lower available nitrogen. But the overlap in management practices among farming systems make broad generalizations difficult. Moreover, environmental and crop species and/or cultivar interactions may exert stronger effects than management. Here we summarize the known factors influencing soil and plant health and link these with food-crop quality and human health. Though this paper draws primarily from research on organic farming, management practices that enhance soil, plant, and human health remain an important goal for all sustainable food production systems.
    Full-text · Article · Dec 2016
    • "This could attract a wider group of consumers. To use such benefit claims, further research might be needed to evidence the link between animal welfare and other product benefits, such as for example indications of a positive relationship between animal welfare and milk quality (Müller-Lindenlauf et al., 2010) or a higher nutritional quality in products that originate from organic dairy farms (Palupi et al., 2012). In contrast to attitudes and perceptions, intention to purchase animal-friendly milk was neither significantly related to socio-demographic factors (such as sex and age) nor to behavioral characteristics (such as frequency and type of milk consumed) when analyzed in a multivariate setting together with attitudinal factors. "
    [Show abstract] [Hide abstract] ABSTRACT: Concern about the welfare of production animals is growing among various stakeholders, including the general public. Citizens can influence the market for premium welfare products by expressing public concerns, and consumers—the actors who actually purchase products—can do so through their purchasing behavior. However, current market shares for premium welfare products are small in Europe. To better align purchase behavior with public and individuals' concerns, insight is needed into determinants that influence the intention to purchase premium welfare products. A cross-sectional online survey of 787 Flemish milk consumers was conducted to investigate attitudes toward and intention to purchase animal-friendly milk. More than half of the sample (52.5%) expressed the intention to purchase animal-friendly milk. Linear regression modeling indicated that intention was positively influenced by (1) higher perceived product benefits from animal-friendly milk (milk with more health benefits and higher quality); (2) higher personal importance of extrinsic product attributes such as local production and country of origin; (3) higher personal importance of animal welfare; (4) a more natural living oriented attitude toward cows; and (5) a more positive general attitude toward milk. Intention was negatively influenced by (1) a stronger business-oriented attitude toward cows; and (2) by a higher personal importance attached to price. These insights in key components of purchase intention can assist producers, the dairy industry, and retailers to position and market animal-friendly milk.
    Article · Jul 2016
    • "Therefore, specifically for a developing country like Bangladesh, organic farming holds environmental promises. Many previous studies found organic foods to be more nutritious than genetically modified (GM) foods (Palupi, Jayanegara, Ploeger, & Kahl, 2012). Some authors specifically confirmed the nutritional superiority of plant-based organic foods when compared with genetically modified plant-based foods (Benbrook et al., 2008). "
    [Show abstract] [Hide abstract] ABSTRACT: The global demand for organic foods has inspired the academicians and practicing professionals to explore consumer purchase behavior in this sector. The multiple promises that organic foods hold for the future – like sustainable food production, food safety, food security, nutrition and reduction of greenhouse gases – all might have influenced the recent rise of behavioral research in the organic food sector. Interestingly, Bangladesh has been a producer of organic foods since the early '80s; however, only a handful of studies could be traced that actually studied consumer behavior in this sector. The current paper explored the important roles that organic foods might play in Bangladesh, synthesized findings of past studies under Bangladesh context, and justified probable areas that might be investigated in future. Therefore, plausible gaps were explored in the existing literature pertaining to Bangladesh context and a tentative research agenda for future researchers was proposed. JEL classification: M30, M31, M39 Keywords: organic food purchase behavior; organic foods in Bangladesh; roles of organic foods in a developing country; behavior of organic foods consumer; green marketing and organic foods.
    Full-text · Article · May 2016 · Journal of Dairy Science
Show more