Nutritional value of huhu grubs assessed

Date:
January 18, 2022
Source:
University of Otago
Summary:
Huhu grubs have long been prized as a traditional food source and
their nutritional value has just been analysed.



FULL STORY ==========================================================================
Huhu grubs have long been prized as a traditional food source and
their nutritional value has just been analysed by University of Otago researchers for the first time.


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The study of the mineral and macronutrient composition of huhu grubs (Prionoplus reticularis larvae) was undertaken by Food Science PhD
student Ruchita Rao Kavle and the results have recently been published
in the International Journal of Food Science and Technology.

Miss Rao Kavle says the analysis found huhu grubs had a high fat content
-- for which they have traditionally been known -- but it was the high
levels of protein that really stood out.

"Across the four development stages of the huhu, protein ranged from
26.2 per cent to 30.5 per cent, which is high when compared to other
common protein sources such as beef (21 per cent), lamb (20.3 per cent), chicken (17.4 per cent), soy (13 per cent), and chickpeas (20.5 per cent).

"We also found that the grubs were rich in essential minerals which all
play vital roles in human health and nutrition, the most abundant been manganese, magnesium, phosphorus, iron, copper, and zinc," she says.

The analysis was undertaken on wild huhu grubs during four different development stages of their life cycle, and which were harvested from
a pine- forested site in Dunedin.



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Miss Rao Kavle says based on the results, a person weighing 60kg would
require around 170g of huhu, or about 75 huhu grubs, to meet the same
daily protein requirement that could be sourced from 230g of beef.

"Compared to beef, a smaller amount of huhu needs to be consumed, but
some people would find eating 75 grubs off-putting." Miss Rao Kavle's
research is also looking into options to process the grubs into more presentable forms such as flour and meals.

Study supervisor and co-author Dr Dominic Agyei says this pioneering
study brings scientific evidence to highlight the nutritional value of
the traditional food source.

He says that even though huhu grubs have not been accessible commercially
in New Zealand, there is an ever-growing interest in sustainability
in food production, alternative proteins, and the need to diversify
food sources.

"A focus on indigenous foods, particularly their unique nutritional and
health properties, and alternative proteins is surging. This study on
the huhu comes on the back of other research we have also undertaken on
the larvae of several edible insects such as mealworms and black soldier flies," Dr Agyei says.

The research concluded that New Zealand wild-harvested huhu is nutritious
and safe for consumption, however the authors point out that as with
most foods, moderate consumption is recommended, and the importance of
variety and balanced diets cannot be overruled.

========================================================================== Story Source: Materials provided by University_of_Otago. Note: Content
may be edited for style and length.


========================================================================== Related Multimedia:
*
Ruchita_Rao_Kavle_holding_huhu_grubs_(Prionoplus_reticularis_larvae).

========================================================================== Journal Reference:
1. Ruchita Rao Kavle, Alan Carne, Alaa El‐Din Ahmed Bekhit,
Biniam
Kebede, Dominic Agyei. Macronutrients and mineral composition
of wild harvested Prionoplus reticularis edible insect at
various development stages: nutritional and mineral safety
implications. International Journal of Food Science & Technology,
2022; DOI: 10.1111/ijfs.15545 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2022/01/220118104141.htm

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