Onion

Onions are a common vegetable with potential health benefits that go beyond adding flavor to dishes. Research highlights onions as a source of bioactive compounds that can protect against physiological threats and enhance testosterone levels in males. The outer layers, particularly red onion skins, contain active ingredients like flavonoids and quercetin, which exhibit antioxidant and anti-inflammatory properties beneficial for functional food applications. Additionally, lactic acid fermentation of osmo-dehydrated onions has been explored to improve their nutritional value and shelf life.

Onions also serve as a source of selenium compounds, which are known for their potential health benefits, including antioxidant effects. Despite these promising findings, the evidence is still evolving, and more research is needed to fully understand the extent of onions' health benefits.

Sources

• Onion: nature protection against physiological threats. (PMID:24915405)
• Red onion skin active ingredients, extraction and biological properties for functional food applications. (PMID:35509169)
• Lactic acid fermentation of osmo-dehydrated onion. (PMID:36007442)
• Testosterone in Males as Enhanced by Onion (Allium Cepa L.). (PMID:30795630)
• Valorization of onion wastes and by-products using deep eutectic solvents as alternate green technology solvents for isolation of bioactive phytochemicals. (PMID:40058891)
• Seleno-compounds in garlic and onion. (PMID:16480995)

_Worker-drafted node, Hermes writer enrichment, pending editorial review._