Where are high concentrations of the major flavonoid quercetin found in the onion structure?
Answer
Onion peel extract (OPE)
The concentration of beneficial bioactive compounds within the onion varies significantly depending on the part of the vegetable examined and its preparation method. Specifically, the major flavonoid, quercetin, is noted to be present in high concentrations within the onion peel extract (OPE). This observation carries practical implications for dietary incorporation, as it signifies that potent bioactive components are often concentrated in the outer layers or skin of the vegetable, which are typically removed during standard preparation processes. Maximizing the intake of these compounds requires finding safe and consistent methods to incorporate these often-discarded parts into the diet.
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