Summary
This laboratory study characterised the nutritional and phytochemical composition of rice husks, a milling by-product collected in Nigeria. Proximate analysis showed substantial fibre (25.74%) and ash content (23.39%), whilst phytochemical screening and GC-MS identified multiple vitamins, 11 minerals, and 34 bioactive compounds including flavonoids, carotenoids, glycosides, and phenolic derivatives. The authors conclude that the high nutritional and bioactive profile positions rice husk as a promising ingredient for functional food formulations.
Regional applicability
The study was conducted in Nigeria and reports composition of locally sourced rice husks. Findings may be transferable to United Kingdom food industry applications and by-product valorisation, though local agronomic practices, rice varieties, and milling conditions could influence composition. Rice husks are not a traditional UK crop residue; applicability would depend on import sourcing or use in novel food/supplement manufacturing sectors.
Key measures
Proximate composition (carbohydrate, crude protein, moisture, crude fat, fibre, ash percentages); phytochemical screening; vitamin profile (A, C, D, E, K, B1–B12); mineral content (calcium, magnesium, potassium, sodium, zinc, iron, selenium, cobalt, manganese, copper, phosphorus); GC-MS characterisation of 34 bioactive compounds
Outcomes reported
The study characterised the proximate composition, phytochemical profile, vitamin and mineral content, and bioactive compounds present in rice husks collected from a local mill in Nigeria. Analysis identified carbohydrates (37.04%), fibre (25.74%), ash (23.39%), multiple vitamins (A, C, D, E, K, B-complex), and 11 minerals, plus 34 bioactive phytochemicals via GC-MS.
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