Bests & Worsts Reviews from Amazon

The product came quickly. It’s easy to use and stayed in place for 6-7 hrs. Both patches turned black in the morning every morning. There is no lightening there. It’s moist with black slightly sticky stuff on your feet in the morning but easily washed off. What I don’t understand is why? Was the sweat from your feet in contact with the substance in the patch that turned the patch black or was it truly something toxic being pulled out from your body via your feet? Can the seller provide an explanation with some scientific evidence? Do I feel any difference after using them for five days? Not really. But it is not known how long you need to use these to see any physical impact that is not an placebo effect. That is my trial experience. Is there any harm done!? No. No allergic reaction either. I also found a dozen of similar patches on sale on the market. They all have one ingredient in common, the bamboo vinegar. It seems it is worth to look into what it does. Thank you.