RRI.CO.ID, Jakarta - Onion (Allium cepa) is a common kitchen ingredient in Indonesia that has gained scientific attention due to its high content of quercetin, sulfur compounds, and flavonoids. These compounds contribute to the characteristic aroma of onions and have been investigated for their potential effects on cardiovascular and cellular health.
A review published in the journal Nutrients reported that onions are among the richest dietary sources of quercetin, a flavonoid compound with antioxidant and anti-inflammatory properties. Researchers have studied quercetin because of its ability to influence oxidative stress and inflammatory pathways.
One of the major research areas involving onions is cardiovascular protection. Studies suggest that onion-derived flavonoids may contribute to maintaining vascular function by supporting healthy inflammatory responses and protecting blood vessel cells.
Onions have also been investigated for metabolic health. Certain compounds in onions may influence glucose metabolism and antioxidant defense systems, although more human studies are needed to determine their clinical significance.
Beyond nutrition, onion extracts are being explored in cosmetic and pharmaceutical research. Quercetin-rich plant extracts are studied for potential skin-protective applications because oxidative stress plays an important role in skin aging.
Although onions are safe for most people, concentrated onion supplements may have stronger effects than typical dietary intake. Individuals with sensitivities or specific medical conditions should seek medical advice.
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