One key benefit of onions is their potential role in blood sugar regulation. Compounds such as quercetin and sulfur-containing elements may help improve insulin sensitivity, allowing glucose to move more efficiently from the bloodstream into cells. This can support steadier blood sugar levels, particularly for those managing or trying to prevent insulin resistance.
Onions are also associated with artery health. Antioxidants help counter oxidative stress, a major contributor to plaque buildup in blood vessels. By reducing damage to artery walls, onions may help maintain flexibility and support healthy circulation over time.
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