One opinion: "The process is called "electrocoagulation." Essentially the device is coagulating the colloidal minerals and organic materials (such as algae) which are normally held in electrostatic suspension, and bringing them to the surface. This process has been around for decades. It's used to treat wastewater in 3rd world countries. This home "detox" and others such as "Alimtox" are nothing but a hoax. It's modern snake oil!
    Somebody also said: "Simple biology: human sweat glands, human skin, is not designed to eliminate toxins from the body." Therefore they cannot be utilized to do such. The kidneys, liver, and excretory systems of the body (urinary system, colon) are designed to eliminate toxins. The only thing this machine does is coagulate the materials - organic and inorganic - that are dissolved in the water. Nothing - NOTHING - is coming out of your body when you stick your feet in this foot bath.     When you put anything in the water you'll also see what they call mold and metal coming out. of course it's not coming out of a person (or the carrot) it is coming out of the array. It is physiologically impossible to pass metal out of the body in a microscopic form and have it reform outside the body, please use your mind and think!!!"
   Another opinion: "Almost  Every doctor in the world knows this process is not valid because it is a simple scam on anecdotal evidence to guide them in a diagnosis, they always begin with "how do you feel" or tell me about the pain etc. This process is not valid because it is a simple scam that preys on the unsuspecting and believing public".
  Another Doctor says.. "I believe that in actuality, the electrical charge of the foot baths is producing stimulation of acupuncture points, especially relating to the kidney and liver meridians.  By stimulating these acupuncture meridians, I believe that the function of the kidneys and liver may be enhanced sufficiently to  improve the body’s own natural detoxification mechanisms. 

So, are the foot baths a hoax?  Yes and no.  Obviously, anyone who claims they pull toxins out of the body is either misinformed or is intentionally trying to mislead others.  The color changes, particles, and foam are all just show - and are created by the electrical array, not by toxins leaving the body.  But since the foot baths do appear to have legitimate therapeutic effects, I don’t think it’s fair to consider them a complete hoax. 

That being said, do I recommend detox foot baths?  No.  Assuming that I am correct about the stimulation of acupuncture meridians, there are other methods of getting the same benefits, many of which are probably more cost-effective in the long run than the detox foot baths.  But for people who enjoy them and feel that the benefits are worth the cost, I see nothing wrong with using them. "

From another person: "complete hoax designed to remove your money from your wallet.

It is just a chemical reaction with the metal plates, or chemicals (different versions of the "foot detox" are available" ) when a weak electric current is applied. You can prove this by doing everything EXCEPT put your feet in the water....it will still turn funny colours.

There is absolutely no scientific reason to think that toxins can be sucked out of your body through your feet...that makes no sense physiologically, biochemically or anatomically."