The Surprising Way Onions May Help Sleep

Despite these concerns, doctors also point out a lesser-known benefit: onions contain compounds that may support relaxation and sleep.

Onions are a natural source of:

• Quercetin, a powerful antioxidant that may reduce stress and inflammation
• Prebiotic fibers, which support gut bacteria linked to better mood regulation
• Trace amounts of tryptophan-related compounds, which play a role in serotonin and melatonin production

Some small studies suggest that onion extracts may have mild sedative effects, helping calm the nervous system. This is why in some traditional remedies, onion-based preparations were used to ease restlessness.

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