Dietary fatty acids (FA) consumed by sheep, like other ruminants, can undergo biohydrogenation resulting in high proportions of saturated FA (SFA) in meat. Biohydrogenation is typically less extensive in sheep than cattle, and consequently, sheep meat can contain higher proportions of omega (n)− 3 polyunsaturated FA (PUFA), and PUFA biohydrogenation intermediates (PUFA-BHI) including conjugated linoleic acid (CLA) and trans-monounsaturated FAs (t-MUFA). Sheep meat is also noted for having characteristically higher contents of branched chain FA (BCFA). From a human health and wellness perspective, some SFA and trans-MUFA have been found to negatively affect blood lipid profiles, and are associated with increased risk of cardiovascular disease (CVD). On the other hand, n − 3 PUFA, BCFA and some PUFA-BHI may have many potential beneficial effects on human health and wellbeing. In particular, vaccenic acid (VA), rumenic acid (RA) and BCFA may have potential for protecting against cancer and inflammatory disorders among other human health benefits. Several innovative strategies have been evaluated for their potential to enrich sheep meat with FA which may have human health benefits. To this end, dietary manipulation has been found to be the most effective strategy of improving the FA profile of sheep meat. However, there is a missing link between the FA profile of sheep meat, human consumption patterns of sheep FA and chronic diseases. The current review provides an overview of the nutritional strategies used to enhance the FA profile of sheep meat for human consumption.
New forms of knowledge production that actively engage in different types of knowledge in participatory settings have emerged in the last two decades as ‘the right thing to do’. However, the role scientists play in facilitating these processes remains unclear. This article contributes to calls for more deliberate and critical engagement between scholarship and practice of the co-production of knowledge by constructing and testing a conceptual framework based on the literature outlining specific task for scientists in co-production processes. This framework is used to analyze the co-production of knowledge for local food security policy in South Africa, based on documentary analysis and in-depth interviews with scientists, policy makers and stakeholders. It shows that the tasks set out in the conceptual framework provide a useful lens for unpacking, and so better understanding, the role played by scientists in knowledge co-production. Applying the framework also helps to uncover insights into proximate outcomes of co-production, such as increased capacity and power redistribution, as well as critical contextual factors, such as the type of policy problem and the prevailing governance framing. The article concludes that more nuanced and critical understanding of the role of scientists in the co-production process will help over-come the apparent paradox that, although co-production is a ‘buzz word’, researchers often they still adhere to objective and linear knowledge production.
Meat has been an important component of the human diet for centuries as a rich source of essential nutrients required for development, growth and maintenance. In addition to its nutritional value, meat production and processing provide employment and income generation in both commercial and informal farming sectors. However, in recent times, the sustainability of meat production, as well as the quality and safety of meat products has come under intense scrutiny as a result of the negative implications of livestock farming and meat consumption on the environment and human health, respectively. These concerns have become increasingly important to consumers and significantly influence consumption trends and the viability of the meat industry. Meat quality, safety and nutritional composition are influenced by the wide range of conditions to which meat-producing animals are exposed from ‘farm to fork’. Hence, a complete understanding of meat and factors affecting it at every stage of the production chain is beneficial for the control and enhancement of meat quality. Additionally, adopting a systems approach is key to minimizing the negative implications of the meat industry on the environment and health. Current farming conditions are characterized by increasingly variable weather patterns and a diminishing natural resource base. As such, determining environmentally friendly, climate resilient and sustainable production systems is crucial. Pre- to post-slaughter processes tailored to maximize carcass yields, minimize losses and prevent health risks are essential. Furthermore, there is a growing need among consumers for transparency and detailed information on meat production and composition. Research that links the dynamics involved in all stages of meat production is necessary to sustain the positive role of meat in the human diet and to maximize the contribution of meat towards the alleviation of food insecurity, while easing the impact on the environment.
If food democracy is about who gets to determine the food that we eat and the character of the underlying food system, then we must examine not only who gets to make decisions that impact on food but also on what evidence, or knowledge, these decisions are made. This article argues that widening the democratic scope of knowledge on which our decisions on food are based is an essential component of food democracy. Food democracies do not just call for citizens to be knowledgeable about the food system but for all stakeholders to actively contribute to the holistic understanding of the food system. Four dimensions of knowledge democracy are set out: The co-production of knowledge with stakeholders; harnessing non-cognitive knowledge represented in arts and culture; knowledge as a tool for action; and the open access and sharing of knowledge. This framework is then used to explore how knowledge is currently already produced and used in a way that enhances food democracy, including through Participatory Action Research with peasant farmers, using the arts to create a ‘contemplative commons’ about food and the unique dialogue process through which the social movement La Vía Campesina operates. Based on these, and other, examples the article concludes that universities, and other recognized centres of knowledge production, need to focus not only on creating new knowledge partnerships but also on finding spaces to challenge and shift accepted ways of knowing in order to better promote food democracy.
In Africa, food systems intersect with dynamics such as demographic growth, urbanisation, and climate change, as African food systems are key drivers of livelihood provision, development, and human-environment interactions. The governance of African food systems shapes how food systems are changing as a response to these dynamics, which will have important social, economic, and ecological impacts for generations of Africans. This article positions large land investments in food system changes in central Kenya and northern Mozambique based on a large-scale household survey and interviews, and uses these findings to debate the concept of food democracy. Large land investments contributed to more modern food systems, which impacted land availability, household’s engagement in agriculture, and supply chains. These changes shifted power and control in local food systems. But even in the ‘extreme’ example of land investments, local perspectives challenge what could, and could not, be included in a democratic food system.
Nonylphenol (NP) and its detrimental effects on the environment, humans, wildlife, fish and birds is an increasingly important global research focus. The number of investigations on the toxicity and metabolic fate of NP in plants is however limited. This paper reviews the prevalence and source of NP in plants and the effect it has on its morphological, physiological and ultrastructural status. Fruit and vegetables have been found to contain levels of NP that is twenty-fold exceeding the no observable effect level (NOEL) of freshwater algae. Apart from the potential risk this poses to the health of consumers, it can overburden the plant’s natural defence system, leading to growth disorders. Plants exposed to NP show signs of overall growth reduction, changes in organelle structure and oxidative damage. These adverse effects may exacerbate the food security dilemma faced by many countries and impede their progress towards attaining the sustainable development goals.
obesity; food environments; urban; mapping; nutrition; South Africa; Ghana;