Hassanally 2020 Snack Development For School Feedin
Hassanally 2020 Snack Development For School Feedin
Hassanally 2020 Snack Development For School Feedin
Environmental Research
and Public Health
Review
Snack Development for School Feeding Programs in
Africa: A Scoping Review
Saffia Hassanally *, Ashika Naicker and Evonne Singh
Department of Applied Sciences, Consumer Sciences: Food and Nutrition, Durban University of Technology,
70 Steve Biko Road, Musgrave, Berea 4001, South Africa; ashikan@dut.ac.za (A.N.); evonnes@dut.ac.za (E.S.)
* Correspondence: saffiahassanally@gmail.com; Tel.: +27-7-1760-6300
Received: 4 May 2020; Accepted: 17 June 2020; Published: 10 July 2020
Abstract: The benefits of school feeding have been well documented. As such, school feeding
programs have continuously gained popularity in developing countries. However, challenges and
potential opportunities persist, calling for a review of school feeding for long-term sustainability.
South Africa has an opportunity to improve their National School Nutrition Program (NSNP) by
including an energy-dense snack that would increase the recommended dietary allowance (RDA) of
school children to meet at least 25% of their energy requirements. The objective of this scoping review
was to conduct a review and an appraisal of studies on snack food development for school feeding
programs in Africa. Eligible studies had to report snack development for school feeding programs in
Africa. We conducted an electronic search in National Research Foundation (NRF) NEXUS, Elton B.
Stephens Company (EBSCO), International Food Information Service (IFIS), Nutrition and Food
Sciences Center for Agriculture and Bioscience International (CABI.ORG), and Google Scholar. Of the
429 articles identified, nine studies were included in the final review—five from within South Africa
and four from elsewhere in Africa. Data extracted included the study design, intervention, outcomes,
relevant findings, and limitations. Results were presented in a narrative summary. The review
findings showed that energy-rich staple foods and food fortification were commonly used in snack
development. The popular snack products developed included porridges and biscuits. While most
studies reported nutritional outcomes, few studies reported on sensory acceptability tests and only
two studies conducted a cost analysis. This review of previous snack development initiatives for
school feeding programs in Africa underscores the importance of establishing the sustainability of
any food product developed. The findings of this review have the potential to inform future snack
product development for school feeding programs.
Keywords: school feeding program; snacks; healthy; learners; primary school; energy-dense
1. Introduction
It has become increasingly important to many heads of state, governments, and organizations
around the world to end world hunger and improve food security for all regions in the world [1].
School feeding has been identified as a means of addressing the Millennium Development Goals
1 and 2, which aim to halve the proportion of people suffering from hunger worldwide and to
ensure universal enrolment in primary school education [2,3]. Several government policies have been
initiated to address the issue of food insecurity in South Africa, such as the Food Fortification Program,
food supplementation, and school feeding programs, including the National School Nutrition Program
(NSNP), as well as daycare center schemes [4]. In 1994, a national scale primary school feeding program
was established by the South African Department of Health and was taken over by the Department of
Education in 2004 [3]. The latest figures from the 2019/20 Basic Education Department Budget Vote
speech indicate that 1.6 billion ZAR (89736464 USD) was allocated to the NSNP in South Africa [5].
Int. J. Environ. Res. Public Health 2020, 17, 4967; doi:10.3390/ijerph17144967 www.mdpi.com/journal/ijerph
Int. J. Environ. Res. Public Health 2020, 17, 4967 2 of 13
The NSNP reaches approximately 20,000 schools that are classified among the three poorest quintiles
and provides meals to more than nine million learners nationwide [6]. The NSNP aims to enhance the
learning capacity of learners by providing a healthy school lunch meal to increase learners’ energy
levels, as well as improving micronutrient intake, making them alert and receptive during lessons [7].
Currently, the South African School Feeding Program provides only 18% of the recommended dietary
allowance (RDA) for children [8,9]. South Africa has an opportunity to improve current gaps in
its school feeding program. The recent report on the National School Nutrition Program in South
Africa recommended the development of an energy-dense snack to increase the recommended dietary
allowance (RDA) of school children to meet at least 25–30% of their energy requirements, which will
also address other critical issues, such as micronutrient deficiencies and hunger [9]. The three major
micronutrients that almost one-third of the world’s population lack are iodine, iron, and vitamin A,
deficiencies of which can result in severe consequences, including learning disabilities in children,
impaired work capacity, serious illness, and death [10,11]. Micronutrient deficiencies are common
among school children, but unlike stunting and various other effects of long-term malnutrition,
micronutrient deficiencies are reversible with the use food intervention strategies, such as school
fortification feeding programs or the addition of supplements into school feeding programs [3].
School feeding programs not only reduce short term hunger but alleviate the effects of malnutrition
on learning capacity, having a greater impact on the improvement of learner performance in tests
and exams [6]. In addition to providing an incentive to attend school, implementation of a school
feeding program may also reduce absenteeism. A review of studies showed that school feeding was
associated with an estimated average of four to six additional days of attendance at school per child
per year, which could be due to the attraction of a free meal [12–14]. The benefits of snacks in the
school feeding programs are well established. Snacks alleviate short-term hunger and micronutrient
deficiencies, improve learning, and are cheaper and easier to distribute than meals [2]. In accordance
to business plans and minimum feeding requirements as outlined by the South African National
Treasury department, the suitable average cost per meal per learner per day (inclusive of cooking fuel
and honorarium) should be 2.85 ZAR (0.16 USD) for primary schools and 3.60 ZAR (0.20 USD) for
secondary schools in South Africa; hence, the inclusion of a snack has to be cost-effective [9].
The food product development process from concept to commercialization plays a crucial role
in the success of new food products; however, some products have a high failure rate due to low
investment rates in research and development activities and lack of incorporation of consumer
preferences in the product development process [15,16]. Research in snack development for school
feeding programs in Africa has mainly been driven by food security, health, or educational outcomes;
however, it is not clear how the product development process is integrated and what impact it has for
country-wide scalability.
Scoping reviews provide an overview and analysis of the available research evidence without
providing a summary answer to a discrete research question [17]. This paper aims to identify and
review the literature of the snack product development for school feeding programs that have been
developed in Africa to inform future snack development for school feeding programs.
and Bioscience International (CABI.ORG), and Google Scholar. We imported all papers (titles and
abstracts) into an endnote database and removed duplicates. Using the pre-specified inclusion criteria,
the article’s titles and abstracts were screened by one independent reviewer. Relevant information
on the study design, duration, number of participants, age of study population, the type of product
developed, outcomes, results, and limitations were extracted. The critical appraisal of studies included
the adherence to the steps of food product development. Other considerations included in the appraisal
were packaging, storage, transport and food safety. Conformance to the product development was
assessed using the model by Fuller, as follows: (1) idea generation, where the company looks at the
consumers’ needs and forms an idea, involving technical marketing and manufacturing personnel;
(2) screening of ideas, where the company looks at the feasibility of the idea and whether it is marketable;
(3) development, where a trial product is produced and goes through a multitude of tests, including
objective testing, consumer preference testing, market testing, and evaluation; (4) production, involving
the establishment of certain requirements and specifications of the product; (5) consumer trials, where
the product goes through a series of trials that determine the consumer acceptability of the product using
the skills of trained sensory analysis panelists; (6) test marketing, where the product is released onto the
market and is observed over a period of time. Fuller’s theory is more acceptable for developing food
products as it makes use of subjective methods to measure the sensory properties of new food products,
which are believed to be more accurate in determining consumer acceptability and preference [19,20].
Studies reporting on snack development for school feeding programs in Africa for both primary and
secondary school children were eligible for the review. Articles published in English and unpublished
dissertations and theses for the period 2000–2020 were included in the review. The included studies
were not limited to reporting snack product development, but also included studies reporting health
and educational outcomes from the snack product development. The age inclusion criteria covered
the general school age of children in Africa, which was guided by the South African Schools Act of
1996, whereby children aged 7–15 are compelled to attend school; and the RDA categories for children:
4–8 years, 9–13 years, and 14–18 years [21,22]. The study designs included experimental, randomized,
and non-randomized control trials; cross-sectional designs; and pre- and post-test designs. Data were
extracted by two reviewers (S.H., A.N.) into a master table. All extractions were checked for accuracy
by a third reviewer (E.S.). Any disagreements were discussed until agreement was reached.
3. Results
Identification
Studies included in
qualitative synthesis
(n = 9)
Figure
Figure 1. Preferred
Preferred Reporting
Reporting Items
Items for
for Systematic
Systematic Reviews
Reviews and
and Meta-Analyses
Meta-Analyses (PRISMA)
(PRISMA) flow
flow
diagram
diagram [23].
3.3. Summary
3.3. Summary of
of Table
Table 11
From the
From thenine
ninestudies
studiesreviewed,
reviewed,threethree
were randomized
were randomizedcontrol trials,
control twotrials,
were two
non-randomized
were non-
controls trails, two were cross-sectional studies, one was an experimental product
randomized controls trails, two were cross-sectional studies, one was an experimental product development study,
one was a mixed methods design, and one was a pre- and post-test design. The
development study, one was a mixed methods design, and one was a pre- and post-test design. The duration of the studies
ranged between
duration 1 month
of the studies and 2.5
ranged years. 1Children
between month and from2.5
rural schools
years. werefrom
Children usedrural
for seven of the
schools studies,
were used
while the remaining two studies recruited children from urban schools. The types
for seven of the studies, while the remaining two studies recruited children from urban schools. The of snacks developed
ranged
types offrom
snacksporridges
developedto biscuits,
ranged while one study to
from porridges developed
biscuits, awhile
beverage snack.developed
one study Five studies reported
a beverage
only nutritional
snack. Five studiesoutcomes
reported [24–28]; two studiesoutcomes
only nutritional reported nutritional,
[24–28]; twosensory,
studiesand cost-effectiveness
reported nutritional,
outcomes [29,30]; one study reported nutritional and educational outcomes [31];
sensory, and cost-effectiveness outcomes [29,30]; one study reported nutritional and educational and one study reported
on only the sensory outcome [32]. For studies conducting anthropometric measurements,
outcomes [31]; and one study reported on only the sensory outcome [32]. For studies conducting standardized
methods were used
anthropometric for two outstandardized
measurements, of three studies, usingwere
methods World Health
used Organization
for two out of three(WHO)
studies,growth
using
reference charts appropriate to each study population [28,31]. The remaining
World Health Organization (WHO) growth reference charts appropriate to each study population study, which conducted
anthropometric
[28,31]. measurements,
The remaining did not
study, which indicate which
conducted methods and
anthropometric growth reference
measurements, charts
did not were
indicate
used [24]. Standardized serum retinol measurement methods were
which methods and growth reference charts were used [24]. Standardized serum retinol used for studies that measured
serum retinol levels
measurement methods[24,25,27].
were used for studies that measured serum retinol levels [24,25,27].
Int. J. Environ. Res. Public Health 2020, 17, 4967 5 of 13
Table 1. Cont.
Duration, Number of
Author, Year, Intervention: Product Outcomes and Classification
Study Design Participants, Age of Results of Study Appraisal Limitations
Location Developed (Ingredients) of Outcome
Study Population
No intervention took place
The micronutrient-fortified biscuit
during the school holiday.
was enough to maintain serum Steps of product development:
Logistical issues prevented the
retinol concentrations on a Ideation and screening of ideas
Shortbread-based biscuit Effect of a delivery of a vitamin C-fortified
Duration: 2.5 years; day-to-day basis, however, was not not indicated. No consumer trials
van Stuijvenberg, fortified with B-carotene, iron; micronutrient-fortified biscuit cold drink for nine months.
Cross-sectional 115 primary school enough to sustain levels during the or test marketing.
Dhansay [27] (2007) and iodine-fortified biscuit, on micronutrient deficiencies The biscuit was baked at 210 ◦ C,
study children aged long school holiday. Prevalence of Food Safety: NI
South Africa served with a cold drink in primary school children. which may have possibly
6–11 years low urinary iodine dropped from Packaging: NI
fortified with vitamin C. Classification: Nutritional degraded the iron amino acid
97.1% before the intervention to 4.8% Storage: NI
chelate used in the biscuit.
after the first 12 months of Transport: NI
No sensory acceptability tests.
intervention.
No cost analysis.
No control group (study was a
pre–post study design).
Significant decline in the mean Steps of product development: Reduced reliability of
The impact of a 130-kcal height-for-age z-scores (−0.37952) Ideation and screening of ideas anthropometric measures due
Zivkovich [28] (2011) Duration: 15 months; Uji (Corn based porridge supplemental snack on and mean weight-for-age z-scores not indicated. No consumer trials to learners taking the
Non-randomized,
Roche Village, Rorya 363 primary school made from the root of the growth of primary school (−0.19452) from BL to F/U. (BL = 2.2% or test marketing. measurements for themselves.
experimental
District, Tanzania, children aged cassava plant and millet children aged 41/2 to underweight, 5.3% stunted, and 0.9% Food Safety: NI No sensory acceptability tests.
design
East Africa 4.5–11 years grain). 11 years old. wasted; F/U = no student had a Packaging: n/a No delivery of ingredients on
Classification: Nutritional z-score of <−2 SD for underweight, Storage: n/a certain days.
stunting, or wasting. Transport: n/a Variation in the preparation
methods.
No cost analysis.
An affordable, safe, and acceptable
food product with a low-fat and
Steps of product development:
high-density nutritional profile, with The final snack item was not
Development of a nutritious, Ideation and screening of ideas
Biscuit enhanced with soy at least 20% of RDI for protein and sent for analysis again.
Duration: Not acceptable, and affordable not indicated. No test marketing.
flour (nutty wheat flour, iron was successfully developed. This study was only carried out
du Plessis [29] (2010) Cross-sectional indicated; snack food to prevent obesity Food Safety: Microbiological
Supro Max 6010, flavored Sensory evaluation: 58.3% liked the in 2 primary schools.
South Africa study 209 children aged in children. analysis conducted
sprinkle, baking powder, taste, 57% liked the texture, 54.3% Soy flour (Supro Max 60,100) is
9–13 years Classification: Nutritional, Packaging: NI
margarine, egg, fat-free milk). liked the color, 59.5% liked the smell, not readily available to
Sensory, Cost effectiveness Storage: NI
and 48.9% liked the portion size. consumers.
Transport: NI
Cost per 30 g portion of the biscuit
was priced at 0.55 ZAR (~0.031 USD).
The development of a
Sensory acceptability tests showed
nutritious novel food product
90% of children found the product to
that is acceptable to children,
be acceptable, while 65% liked the
and rich in energy, protein, Steps of product development:
vetkoek very much.
and micronutrients. The Ideation and screening of ideas
The cost of the product was R1.50 More research is needed to test
Kearney, Experimental product should be affordable, not indicated.
Duration: 6 months; (~0.080 USD) per day for a 120 g compliance of consumption
Oldewage–Theron product A nutritious vetkoek (bread cost-effective, and easy to Food Safety: Training provided in
580 rural children portion and contributed to nutrient over a longer period
[30] (2011) development type cake fried in oil). prepare using locally preparation of the vetkoek.
aged 6–13 years intakes of 21.6% for energy, 14.4% for (at least 12 months).
South Africa study available raw materials with Packaging: n/a
calcium, 141% for iron, 62.42% for No market needs analysis.
minimal waste and no need Storage: n/a
zinc, and 17.75% for vitamin A.
for specific fortification or Transport: n/a
The vetkoek had a shelf life of two
enrichment.
days when stored at room
Classification: Nutritional,
temperature (25 ◦ C).
sensory, cost-effectiveness
Int. J. Environ. Res. Public Health 2020, 17, 4967 7 of 13
Table 1. Cont.
Duration, Number of
Author, Year, Intervention: Product Outcomes and Classification
Study Design Participants, Age of Results of Study Appraisal Limitations
Location Developed (Ingredients) of Outcome
Study Population
The inability to conduct an
experimental design where one
There was a positive and statistically
can systematically control for
significant nutritional change over
other intervening factors.
the period of the program.
The design did not control for
Reductions in the numbers of
other factors to some extent,
overweight and stunted children
Steps of product development: and therefore the nutritional
Duration: 10 months; Effect of an in-school were seen (BL = 27.6% of learners
Ideation and screening of ideas and performance changes
6656 learners aged breakfast program on the were either overweight (1.9%) or
Hochfeld, Graham not indicated. No consumer trials cannot be scientifically
6–17 years received Fortified cooked porridge anthropometric and school severely overweight (10.7%). F/U =
[31] (2016) Pre- and post-test or test marketing. attributed to the breakfast
the intervention. 857 (oats, maize, wheat, and performance of school Overweight (13.8%) and severely
Johannesburg, South design Food Safety: NI program.
learners were used for sorghum). children. overweight (6.4%)).
Africa Packaging: n/a The nutrition program was
anthropometric Classification: Nutritional, Learners, educators, and principals
Storage: n/a launched before the baseline
sampling school performance indicated that they believed the
Transport: n/a data could be collected.
breakfast program had a positive
School performance data for the
impact on the children’s ability to
first two terms were missing,
learn by improving their
therefore the data analysis
participation and concentration
was compromised.
in the classroom.
No sensory acceptability tests.
No cost analysis.
QPM kinchie was liked very much by
58% of the participants, whereas only
1.7% rated conventional maize
kinchie in this category.
None of the participants scored QPM Lack of the QPM seed was
kinchie as poor in terms of taste, identified as a possible
Stakeholders’ consultation, Steps of product development:
however 0.8% of participants scored limitation in the way forward
Duration: Not sensory evaluation, and Ideation and screening of ideas
Mixed methods: conventional maize kinchie as poor when implementing QPM into
Belayneh, Yetneberk indicated; Kinchie (Porridge) made from potential impact of quality not indicated.
workshop, sensory for taste; 61% of the participants school feeding programs.
[32] (2018) 95 adolescent girls QPM (quality protein maize) protein maize (QPM) for Food Safety: NI
testing, focus perceived QPM kinchie as very good, Samples that were served later
Ethiopia with an average age of coarsely milled maize gain. school feeding in Ethiopia Packaging: n/a
group discussion whereas only 5% of the respondents showed lower score ratings
14.3 years Classification: Storage: n/a
perceived conventional maize than samples that
Sensory Transport: n/a
as very good; were served first.
66% of participants rated QPM No cost analysis.
kinchie to have good texture and 21%
(very good texture) and 58% reported
conventional maize to have a fair
overall sensory characteristic.
BL = Baseline; F/U = Follow-up; NI = Not indicated; n/a = Not applicable; QPM = Quality protein maize; RDI = Recommended daily intake; BMI = body mass index.
Int. J. Environ. Res. Public Health 2020, 17, 4967 8 of 13
follow-up mean incremental changes in weight, height, and body mass index (BMI) were significantly
higher in the fortified group than in the non-fortified group. The results also showed that the fortified
beverage lowered the overall prevalence of anemia and vitamin A deficiency [24]. Specific nutrient
information on fiber was not mentioned in any of the studies.
In the study by Kearney et al. [30], the developed snack contributed 21.6% of energy, 14.4% of
calcium, 141% of iron, 62.4% of zinc, and 17.7% of vitamin A for the group of children. In the study
by Hochfeld et al., the effects of an in-school breakfast program on the anthropometric and school
performance of school children were evaluated. This study showed positive results, as there was
a statistically significant nutritional change over the period of the program. A 4.7% decrease in severe
stunting levels and an overall 4.3% positive change in the number of children in the category of normal
height-for-age limits were seen. Baseline measurements for overweight learners indicated 27.6%
of learners were either overweight (1.9%) or severely overweight (10.7%), while follow-up results
indicated that the overweight percentage reduced to 13.8% and severely overweight reduced to 6.4%.
Learners, educators, and principles indicated that they perceived that the breakfast program had
a positive impact on the children’s ability to learn by improving their participation and concentration
in the classroom [31].
In another study, primary school learners were fed 125 g of sweet potato for five days during
the week as a snack to assess the effect on the vitamin A status of the children. The treatment group
were fed orange-fleshed sweet potato, which is rich in β-carotene, while the control group were fed
white-fleshed sweet potato. The results of this study showed an improvement in vitamin A stores in
the treatment group as compared to the control group, as the proportion of children with low serum
retinol concentration (<0.070 µmol/L) after the intervention decreased from 71% to 50% (p = 0.001)
in the treatment group and decreased from 73% to 49% (p = 0.001) in the control group [25]. In the
remaining study, the effects of a micronutrient-fortified biscuit on micronutrient deficiencies in primary
school children were evaluated. The results indicated that the micronutrient-fortified biscuit was
enough to maintain serum retinol concentrations on a day-to-day basis; however, it was not enough
to sustain levels during the long school holiday. Urinary iodine levels improved from baseline to
follow-up, where the prevalence of low urinary iodine dropped from 97.1% before the intervention to
4.8% after the first 12 months of intervention [27].
4. Discussion
To find a solution to the impending nutrition insecurity and issues of hunger around the
world, further research needs to be conducted. Three possible research outlooks are: (1) Health
aspect: Having access to nutritious and safe food is important for individuals to lead a healthy,
well-balanced life, therefore research on food safety and agriculture associated diseases and how they
affect developing countries and disadvantaged populations, as well as ways to prevent or minimize
food safety risks, should be investigated [33]. (2) Nutrition aspect: Proper nutrition is essential
to human well-being; however, due to the effects of food insecurity, many people are affected by
malnutrition, which is a complex, multisectoral issue that ranges from the double burden of malnutrition
(where both undernutrition and overnutrition exists in the same society) to non-communicable diseases.
The nutrition aspect also deals with evaluating policies and programs that aim to improve the diets,
nutritional status, and health of people through critical stages of the lifecycle [33]. (3) Agricultural
aspect: The key to reducing poverty and improving food security issues worldwide is to focus
on the development of innovative food products using highly nutritious raw ingredients that can
provide adequate nutrition for majority of people who are disadvantaged and living in developing
countries [33]. Topics of discussion could include fortification, biofortification (process of improving
the nutritional quality of food crops using modern biotechnology), the lack of nutrients or vitamins
seen in people in countries where food insecurity is prevalent, ways to improve nutrition and vitamin
and mineral intake, and the effects of lack of nutrition during critical stages of the lifecycle. Several
government policies have been initiated to address the issue of food insecurity in South Africa, such as
the food fortification program, food supplementation, and school feeding programs, including the
National School Nutrition Program, as well as daycare center schemes [4].
It is noted that National School Nutrition Programs aim to foster a better quality of education
by enhancing children’s active learning capacity, alleviating short-term hunger, providing a positive
incentive for learners to attend school regularly and punctually, and lastly to address micronutrient
deficiencies [4]. Early childhood is an important period of growth and development, both physically
and cognitively, and thus requires an optimal dietary intake of energy and nutrients [34]. Nutrient-dense
snacks are important to optimize children’s nutritional status and cognitive development, as well as to
promote physical growth [35]. According to Greenhalgh, Kristjansson [36], the reasons why school
feeding programs do not work could stem from a number of factors, such as the food provided does
not provide adequate amounts of the missing nutrients; the type of ingredients used may have a low
bioavailability, making it difficult for the body to absorb the necessary nutrients; supplementation
occurs too late, whereby older children are far to malnourished to be able to reverse the effects of
Int. J. Environ. Res. Public Health 2020, 17, 4967 11 of 13
malnutrition by means of a single meal in the day, which supports the notion that targeting the
younger school children would greatly improve the success of the school feeding program. Factors
that may improve the efficacy of school feeding programs include designing a school feeding program
specifically for the needs of that particular community using local teams rather than distance experts,
making sure food is developed to confirm palatability and acceptability, and having measures in place
to ensure that food is actually being consumed, such as close supervision during feeding times [14,36].
In this review, several modalities have been used in the product development of snack foods for
school feeding programs in Africa: staple foods, food fortification, evaluation of nutritional outcomes,
sensory acceptability, and cost-efficacy. Given the central role of staple crops in human nutrition,
agricultural production, and food security at large, staple foods are often used in snack product
development in resource-constrained settings [37]. Being locally produced foods, their inexpensive
nature and energy-dense nutritional offering make them suitable ingredient choices in snack food
development for school feeding programs [38]. Food fortification is another modality that has been
used to improve the nutritional status of populations. With its cost-effectiveness, food fortification has
the potential to significantly benefit the nutritional wellbeing of large segments of populations [39].
Most snack product development initiatives were aligned to nutritional outcomes, with significant
benefits; however, adoption and rollover of these snack foods into the mainstream school feeding
programs were not evident. In general, the appraisal of the review highlights certain missing
components of the product development process of snack foods for school feeding programs in terms
of product success at scale, particularly ideation, consumer acceptability, and cost-efficacy.
Certain limitations of this scoping review were identified. Specific databases, such as Scopus,
were not used as main sources of information but as secondary sources through Google Scholar. Hence,
the review may have missed some relevant studies, and searching other databases may have identified
additional pertinent studies. Screening of articles was done by a single reviewer, increasing the margin
for error; however, extraction of articles was done by two reviewers. The appraisal process of the
review did not assess the quality of studies. Instead, this was guided by the conformance to steps
of new food product development for long-life products, a measure that is used mainly in the food
industry and often excludes the measurement of health outcomes. This review only included studies in
Africa. Snack development for school feeding programs in other developing countries outside Africa
would have added more value to the study.
5. Conclusions
There is a global consensus that school feeding programs generate a lasting impact that can
shape the future of a nation. Upon review of previous snack development initiatives for school
feeding programs in Africa, key points have been identified, which have the potential to inform future
snack development for school feeding programs. The impact and positive effects of nutrient- and
energy-dense snacks on the growth and development of school learners confirm the importance of
various authors’ publications. It is recommended that snack development for school feeding programs
be grounded in a hybrid model of food product development processes with health outcomes, taking
into account children’s nutritional needs in specific countries to ensure maximum impact on learning
outcomes and sustainability for mass production.
Author Contributions: This article was conceptualized by S.H. and A.N. The investigation and the collection of
data were undertaken by S.H., A.N. and E.S. The writing of the original draft was prepared by S.H. and the final
review and editing was overseen by A.N., E.S. and S.H. This article was supervised by A.N. and E.S. All authors
have read and agreed to the published version of the manuscript.
Funding: This research was funded by the Ada and Bertie Levenstein Scholarship in 2019, and the FoodBev Sector
Education Authority (SETA) Research and Innovation Bursary Program, 2020.
Conflicts of Interest: The authors declare no conflict of interest.
Int. J. Environ. Res. Public Health 2020, 17, 4967 12 of 13
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