Detox foot patches, marketed with claims of purifying the body and promoting relaxation, are applied to the soles of the feet overnight. The pads typically contain ingredients such as mugwort extract, wood vinegar, and tourmaline, and are presented as a "centuries-old cleansing treatment" to be used for five to ten consecutive days.
Proponents suggest that the pads change color, turning black by morning, as a sign that toxins have been extracted from the body. This discoloration is intended to visually represent the detoxification process, with purported benefits including purification, relaxation, and the restoration of balance.
However, scientific evidence does not support the claim that these foot patches have any detoxifying effects. While some ingredients, like mugwort extract, may possess anti-inflammatory properties and are used in herbal medicine, their inclusion in these patches has not been shown to aid in toxin removal through the feet. Consultant podiatric surgeon Trevor Prior notes that the sole of the foot, being covered by the thickest skin, makes absorption difficult. He explains that the observed discoloration is more likely a reaction to the heat and moisture generated during sleep, rather than an indication of toxins being drawn out.
One user's experience over five nights of application noted no discernible results beyond a sticky residue on the soles of the feet. The patches did change color, but the user found that exposing them to steam from a kettle produced a similar effect, suggesting the color change is not solely due to toxin removal. While the patches are not considered harmful, experts suggest that more effective and less costly methods exist for achieving detoxification without leaving a sticky residue.