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Wild harvested edible insects are characterised by high protein and mineral contents with potential to contribute substantially to nutrition security. However, nutritional content is only beneficial when proteins are digestible and minerals bioaccessible. This study determined the effects of domestic processing on protein digestibility and mineral bioaccessibility of two wild harvested insect species: Eulepida mashona (beetle) and Henicus whellani (cricket). Samples of both insects were subjected to boiling, roasting, or combined boiling and roasting, imitating the way insects are traditionally prepared in Zimbabwe. Moreover, they were in vitro digested according to INFOGEST protocol. Boiling of both insects resulted in loss of protein as it leached into the boiling water. The raw insects had a higher protein in vitro digestibility than the boiled and roasted insects, and the maximal decrease in protein digestibility was around 25% for twice boiling of the beetles and for boiled and roasted crickets. For both insect species, boiling resulted in non-significant loss of iron and zinc. Iron was the least bioaccessible mineral in both insects, based on the concentrations of soluble mineral measured by ICP-AES. However, beetles had a much higher iron bioaccessibility (30.7%) as compared to crickets (8.11%). Interestingly, boiling resulted in about 50% decrease in iron and zinc bioaccessibility in both species while roasting did not. The reduced protein digestibility and mineral accessibility with processing can be explained by protein modification and interactions of minerals with other food components, such as chitin and phytochemicals. Because of the reduction in protein digestibility and mineral accessibility during boiling, roasting should be favoured over boiling and in any case short boiling time is recommended. Unlabelled Image • Eulepida mashona and Henicus whellani proteins are well digestible • Protein digestibility is negatively influenced by boiling and roasting • Iron and zinc content in insects remain stable after boiling • Boiling decreases iron and zinc bioaccessibility while roasting does not • Iron bioaccessibility is higher in beetles than in crickets [ABSTRACT FROM AUTHOR]

Food safety outbreaks are recurrent events, which regularly cost human lives. Food safety goes beyond food safety management systems; an organisation's prevailing food safety culture, and its internal and external environment must also be considered. This study introduces a research framework to analyse crucial food safety culture elements, and characteristics of the internal (i.e. food safety program, product riskiness, and vulnerability of food production system) and the external company environment (i.e. national values and food safety governance characteristics). We hypothesised that companies producing high-risk products are more likely to demonstrate a proactive food safety culture. We used the framework to assess nine companies producing low, medium, and high-risk products in Zimbabwe, as a case of a transition economy. Results showed no direct relationship between product riskiness and food safety culture, which negated our hypothesis. Other variables explored in this study could have moderated the relationship. We found that the vulnerability (i.e. susceptibility to microbial contamination) of the food production system could be associated with an organisation's food safety culture. Moreover, the external environment could have shaped the prevailing food safety culture. In particular, food safety governance and national values seem to be reflected in the way food safety was prioritised, food safety programs were designed and implemented, the prevailing food safety culture, and the observed food safety behaviour. Further research could investigate the role of the external environment in an organisation's food safety culture by evaluating companies in countries operating with different food safety governance approaches and national values. • Prevailing food safety culture seems independent of product riskiness. • Food safety governance could explain the prevailing food safety culture. • Multinational companies have a better food safety culture than local companies. [ABSTRACT FROM AUTHOR]