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When you peel an onion, it’s natural to toss the dry, papery skin straight into the bin. But science says — wait! That flaky outer layer might be far more useful than we think.
Onion peels are packed with antioxidants, especially one called quercetin. It’s a natural plant compound that has been shown to fight inflammation, reduce blood pressure, and support a healthy heart. In fact, onion skin contains more of this good stuff than the onion itself!
But here’s the twist — people don’t usually eat onion peels directly. Instead, they’re used in creative and clever ways. Some families add them to soups or broths while cooking, then strain them out. This adds both colour and nutrients to the dish. Others dry the peels and crush them into a powder, mixing it into smoothies, bread dough, or even rice. Some herbal teas also contain onion skin extract!
Beyond the kitchen, onion peels are being explored for some pretty amazing things. Farmers add them to compost to help crops grow better. Scientists are experimenting with them to make biodegradable plastic and natural fabric dye. In fact, cloth dyed with onion skin has a soft golden-brown colour — all from something most people throw away.
So next time you see your family peeling onions, remember: that “waste” might actually be wellness in disguise. With a little imagination, even onion skin can go from overlooked to extraordinary.
Rich in antioxidants
Onion peels are packed with quercetin, a powerful antioxidant known to fight inflammation and support heart health.
Used in traditional remedies
For centuries, people in parts of India and Europe have boiled onion skins into teas for treating coughs, colds, and sleeplessness.
Natural fabric dye
Onion skins can create shades of yellow, orange, and reddish-brown — often used in natural dyeing of cloth and Easter eggs.
Boosts compost quality
Adding onion peels to compost enriches it with minerals like potassium, iron, and calcium — making it great for garden soil.
Used in flavourful broths
Some chefs simmer onion peels along with soup stocks to give depth of flavour and extra nutrients — then strain them out before serving.
Dried and powdered for seasoning
When dried and ground into a powder, onion peels can add a savoury kick to dishes, especially in zero-waste cooking styles.