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14 October 2022 | Story Prof Johan van Niekerk, Dr Ismari van der Merwe, and Ms Elzmarie Oosthuizen | Photo Supplied
Sustainable food
World Food Day is celebrated annually on 16 October to promote global awareness and action to uplift those who suffer from hunger and to highlight the need to ensure access to healthy diets for all.

Opinion article by Prof Johan van Niekerk, Dr Ismari van der Merwe, and Ms Elzmarie Oosthuizen, Department of Sustainable Food Systems and Development, University of the Free State.



World Food Day is celebrated annually on 16 October to promote global awareness and action to uplift those who suffer from hunger and to highlight the need to ensure access to healthy diets for all. However, in 2022 we are faced with an ongoing pandemic, conflict, global warming, rising prices, and international tensions. All these factors are affecting global food security. Educators have an enormous task to help students develop skills to help build a sustainable world where everyone has regular access to nutritious food. 

Although we have progressed towards building a better world, many people have been left behind – people who cannot benefit from human development, innovation, or economic growth. Millions of people worldwide cannot afford a healthy diet, putting them at high risk of food insecurity and malnutrition. But ending hunger is not only about supply. Enough food is produced today to feed everyone on the planet. The problem is access and availability of nutritious food. People worldwide are suffering from the domino effects of challenges that know no borders.

Students have insufficient balance for food

South Africa has seen a significant expansion of student enrolment in the higher education system, with nearly one million students attending one of the 26 public universities. The number of students in South Africa's higher education system is far below other middle-income developing countries. Therefore, the government aims to increase university enrolment to 1,5 million by 2030. However, the cost of attending university greatly exceeds the financial means of most students. 
Students must divide their budget between rent, tuition, utilities, and the remaining insufficient balance for food, which ultimately increases their food insecurity risk.
Moreover, the transition of school learners to university students is more complicated than foreseen since lifestyle changes have health implications, where the excitement is combined with stress from pressure to perform well academically in a competitive environment. Research has found that first-year students are exceptionally prone to food insecurity. They have newfound independence and are still learning to cope with the milieu away from home. A study on the Bloemfontein Campus by the Department of Nutrition and Dietetics indicated that students experience considerable problems in managing their tasks, time, and finances. The challenge of reduced social support results in lengthy emotional and physical separation from family and friends, which influences standard eating patterns. The students have poor nutritional knowledge, limited earning potential, and a lack of budgeting skills and resources for healthy food preparation. Finally, sociocultural diversity is another factor to consider. It influences students' food patterns, while the total student population of the UFS, about 37 800 full-time students, reflects a rich sociocultural diversity. 

Intake of vegetables, fruit, and protein among students is minimal

When required to earn a degree, food insecurity represents a short period of time, but it can precipitate poor lifelong health behaviour and increased risks of chronic diseases. Prolonged exposure may contribute to the development of obesity. The research found food insecurity is related to poor mental health and academic performance. Students endorse increased rates of depression and anxiety, decreased concentration, and low concentration marks. It leads to lower academic achievement and undermines the goals of tertiary education. The importance of studying the aspects related to students' sustainable food consumption behaviour lies in the fact that, at this age, they begin to develop specific consumption patterns that will have long-term effects.

The average of current first-year students forms part of Generation Zoomers (ages 19-22 years). Generation Zoomers (Gen Z) grew up in specific circumstances, known as the first truly digital natives. They grew up living, working, and socialising with the internet and social media. This generation's economic circumstances are more constrained. The latter is partly due to the rise in university tuition fees. Gen Z forms part of diverse communities seen as networked young citizens, but growing social inequalities often limit their opportunities. This generation is labelled as the stay-at-home generation, with indoor and online socialising on the rise. 

During a study by the Department of Sustainable Food Systems and Development on the South Campus of the UFS (student population – ages 19-22 years), we found that the intake of vegetables, fruit, and protein among our students is minimal and will lead to deficiencies. At the same time, rice and pasta are part of their everyday diet. Money to buy these foods is still an immense problem. Students indicated that they would prefer healthy foods when they had the resources to afford it.

No Student Hungry initiative

Gender and student consumption patterns showed that breakfast consumption decreased, with male students consuming breakfast more regularly than females. The results indicated that students preferred soft drinks (energy) and water (available). They argued that the high consumption of fast food is due to its wide availability and accessibility in commercial and informal outlets. The informal vendors make fast food more available and accessible to low-budget student groups due to the lower food prices. The unhealthy consumption movement is driven by aggressive advertising practices and lower costs. 

Students consume more saturated fat snacks, refined carbohydrates, sweetened carbonated beverages, and diets that are short in polyunsaturated fatty acids (PUFAs) and fibres. Researchers indicated that these unhealthy diets and the increasingly sedentary lives of students could lead to non-communicable diseases such as type 2 diabetes mellitus and heart disease.

Currently, the department forms part of the NO STUDENT HUNGRY (NSH) initiative by establishing vegetable tunnels on campus. It remains an indispensable objective of the department, though, to increase the proportion of university students who receive information on unhealthy dietary patterns; however, nutrition knowledge has only moderate effects on students' attitudes and behaviours. Therefore, we use our Food Security modules as an effective strategy to educate our student community on sustainable food systems by ensuring skills development. Teaching contextual skills (e.g., how to plan and prepare nutritious meals within time and financial constraints) could address this unhealthy behaviour of the UFS students and work towards the sustainable development goal of NO HUNGER in 2030

News Archive

From wheat protein to perfect pizza
2017-09-26

Description: Phd Read more Tags: Barend Wentzel, Department of Plant Sciences, plant breeding, proteins, Agricultural Research Council 

Barend Wentzel received his PhD at the Department
of Plant Sciences during the university’s
winter graduation ceremony.
He is pictured here with Prof Maryke Labuschagne,
professor in Plant Breeding at the UFS.
Photo: Charl Devenish

Barend Wentzel, an alumnus of the University of the Free State’s Department of Plant Sciences, is passionate about plant breeding. 

He literally eats and lives wheat proteins. In 1989 he initiated a breeding programme on arum lilies. “This breeding programme is at an advanced stage,” he said. Besides reading, playing the piano and accordion, Barend, due to the nature of his research at the Agricultural Research Council, also experiments with different types of ciabatta recipes made from sour dough. “I usually make my own pizza on Saturday evenings,” he said.

He is working at the Agricultural Research Council – Small Grain (ARC-SG) at the Wheat Quality Laboratory where he established a Cereal Chemistry Laboratory.

Complexity of flour quality

He explains that the focus of his research is on wheat protein composition. “The research conducted for my PhD study explains the complexity of flour quality to a certain extent, and it further emphasises the influence of the environment and genetic composition on selected baking characteristics. 

“Wheat protein can be divided into different types of protein fractions. These protein fractions contribute differently to dough properties and baking quality and the expression is affected by different components in the environment, including locality, rainfall and temperature. 

“Protein content alone does, however, not explain the variation in baking quality parameters, such as mixing time, dough strength and extensibility, and loaf volume.

“Several methods can be applied to quantify the different protein fractions. I am using high-performance liquid-chromatography (HPLC). The procedure entails the separation of a wheat protein extract through a column with chromatographic packing material. The injected sample is pumped through the column (known as the stationary phase) with a solvent (known as the mobile phase). The specific procedure, size-exclusion high-performance liquid-chromatography (SE-HPLC), is also used by the university’s Department of Plant Breeding, as well as in several international Cereal Chemistry Laboratories,” said Barend.

Dough strength and to loaf volume
“One of the highlights from the study was the positive contribution of the albumin and globulin protein fractions to dough strength and to loaf volume. The findings were wheat cultivar specific and the growing environment influenced the expression. The contribution of these protein fractions was much larger than previously reported for South African wheat cultivars,” said Barend. 
“Previous reports indicated that these protein fractions had a non-specific contribution to the gluten network during dough formation. The findings from this PhD justify further research on albumins and globulin proteins.” 

The Cereal Chemistry Laboratory at ARC-SG is involved in postgraduate student training under Barend’s guidance. He serves as co-promoter for several MSc and PhD students. He is also a collaborator on an international project with the International Maize and Wheat Improvement Centre (CIMMYT) in Mexico. Barend is furthermore working on improving wheat quality for processing and health purposes as a member of the expert working group of the International Wheat Initiative. 

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