A Japanese detox foot patch is a personal care product that has an adhesive side to stick to the bottom of the foot, says Mayo Clinic. The pads are left on overnight and in the morning the pads are peeled off to reveal a dark color.
This color suggests that the pads have removed harmful toxins from the body. However, while many manufacturers claim that detox foot pads treat cellulite, depression, headache, insomnia and promote weight loss, there is no evidence to support the claims, reports Mayo Clinic. Detoxification is a process that might be unnecessary, according to Edzard Ernst, M.D., Ph.D., professor at Peninsula Medical School in Exeter, England. The liver converts toxins into compounds and the kidneys separate the useful from the harmful.