Overview

Onion is a plant. The bulb (rounded underground part) of the onion is used to make medicine.

Onion is most commonly used for scarring. It is also used for other skin conditions and to prevent cancer and heart disease, but there is no good scientific evidence to support these other uses.

How does it work ?

Onion contains chemicals that seem to reduce swelling (inflammation), reduce lung tightness in people with asthma, and reduce levels of cholesterol and sugar in the blood.

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