Onions contain a wealth of vitamins, minerals and healthy compounds that make regular consumption of onions a healthy, everyday choice. Check out the nutritional table.
In 2022, Onions NZ Inc. initiated a study to identify and quantify the unique value attributes of New Zealand grown onions.The main aim of the study was to undertake scientific analysis of the New Zealand onion varieties to identify the presence and levels of phytochemicals, specifically fructans, flavonoids (both anthocyanins and flavonols) and organosulphurcompounds including S-methylcysteine sulfoxide (SMCS) and S-allylcysteine sulfoxide (SACS). The study considered brown and red onions, taking into consideration varietal differences such as early and late season onions. The effect of cooking on flavonoids compounds (quercetin), was also assessed using published procedures.
Phytochemicals are a wide variety of non-nutritive chemical compounds found in plant foods, which may have health effects.
03.
The highest levels of fructans in onion flesh were found in Stoplight, Pukekohe Long Keeper and Rhinestone varieties.
04.
The highest flavonoids (quercetin etc) in onion flesh were found in Brown Onions, grown in Canterbury, South Island, New Zealand.
Thanks to our source:
https://tuigarden.co.nz/how-to-guide/onion-growing-guide/
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