What chemical group is responsible for both the characteristic odor of onions and many of their identified medicinal properties?
Answer
Sulfur-containing compounds, such as thiosulfinates and sulfides
The distinctive chemical fingerprint of onions, which includes both their recognizable odor and many of their recognized therapeutic benefits, originates from specific volatile organic molecules called sulfur-containing compounds. These include chemical classes such as thiosulfinates and various sulfides. These compounds are strongly implicated in the medicinal actions attributed to onions, particularly those related to cardiovascular support, such as reducing the risk of dangerous blood clots. Furthermore, these same sulfur compounds are noted for their role in potential blood sugar regulation, highlighting their centrality to the onion's overall functional food profile.
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