Summary
This paper presents a comprehensive nutritional profile of dried sago grub powder (Rhynchophorus ferrugineus) pre-treated to meet New Zealand biosecurity requirements. The analysis revealed appreciable levels of key minerals including phosphorus, potassium, and magnesium, but identified a suboptimal calcium-to-phosphorus ratio relative to bone health recommendations and a fatty acid composition dominated by saturated fat with low polyunsaturated content. The authors conclude that whilst SGP is safe for consumption with heavy metal levels below toxicity limits, the elevated saturated fatty acid profile and mineral imbalances warrant consideration when evaluating sago grubs as a food source.
UK applicability
The study is relevant to UK food policy and nutrition research regarding novel protein sources and insect-based foods, particularly as the UK develops regulatory frameworks for farmed insect products. However, findings are specific to New Zealand-imported sago grubs and may not reflect nutritional profiles of UK-reared or differently processed insect proteins.
Key measures
Fatty acid composition (% of total FA); lipid nutritional indices (ω6/ω3 ratio, hypocholesterolemic/hypercholesterolemic acid ratio, atherogenicity index, thrombogenicity index, health-promoting index); mineral profile (mg/kg dry weight); heavy metal concentrations (mg/kg dry weight); Ca:P ratio
Outcomes reported
The study evaluated the fatty acid profile, mineral composition, and heavy metal content of sago grub powder (SGP) pre-treated for export. Key findings included quantification of saturated, monounsaturated, and polyunsaturated fatty acids, calculation of lipid nutritional health indices, identification of 11 essential and 29 non-essential minerals, and detection of 4 heavy metals below toxicity thresholds.
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