Can Raw Onions on Your Feet Really Treat a Cold?

Claims that placing raw onions on the soles of the feet can treat colds continue to circulate on social media. The remedy is often promoted as a way to draw toxins from the body or fight infection, but there is no reliable scientific evidence that it does either.

Onions contain nutrients and plant compounds that can form part of a healthy diet. Those benefits, however, do not mean that applying raw onion to the skin can deliver a treatment for a respiratory infection.

Colds are caused by viruses. Placing onions under the feet has not been shown to remove those viruses, shorten a cold or relieve its symptoms. Nor is there evidence that onions can pull unspecified “toxins” through the soles.

The body’s liver and kidneys already play central roles in processing waste and removing unwanted substances. Claims of detoxification through the feet offer no established explanation for how an onion would improve those functions.

For most colds, rest, fluids and appropriate symptom relief are more useful than an onion-based remedy, which may also irritate the skin. Anyone with breathing difficulties, worsening symptoms or concerns about their illness should seek medical advice rather than rely on a social media cure.