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 nourish gut bacteria linked to better mood regulation
Trace tryptophan-related compounds, which play a role in serotonin and melatonin production
Some small studies suggest onion extracts may have mild sedative effects, helping calm the nervous system. This may explain why traditional remedies in some cultures used onion-based preparations to ease restlessness and promote relaxation.
