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June 28, 2006

BehindTheMedspeak: Can the silver nanoparticles in Plank's Cor soap give you argyria?


The thought never occurred to me when I featured Cor — the world's most expensive soap — on June 7.


Only when the redoubtable Guy King weighed in with a comment that included this link to a frightening series of cases of argyria (silver poisoning) did it occur to me that he raised an excellent question.


Photos of people with argyria appear above and (left) below.


Long story short: when the human body accumulates sufficient silver it reacts to sunlight like a photographic (film) negative — and develops.

Can nanoparticles be absorbed through the skin and cause toxicity?

No one knows — yet.

But before you commit to a lifetime of Cor soap use, take a moment to consider that the long-term effects of exposure to metal nanoparticles are simply an unknown at this point.


You might be a case report yourself, circa 2020.

June 28, 2006 at 04:01 PM | Permalink


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any heavy metal will stay in the body and usually accumulate over a period of time. granted, silver has a different effect than most other metals (such as the highly toxic lead) but it does still stay in the body; and most heavy metals go straight to the brain to hang out, usually attaching to brain cells. i haven't personally looked into the silver effect on the brain but i'm sure it's not much different on that aspect. yes silver does kill bad bacteria and leave the good intact unlike most dr prescribed antibiotics, but it has been proven in tests to cause harm too (over an extended period of time).

P.S. and to um.. Marty | Jun 28, 2006 8:52:07 PM.. silver and aluminum are to completely different metals

Posted by: bobjones | Oct 3, 2008 12:51:15 PM

Max, at the risk of sounding snobby, you should perhaps invest a few dollars in learning to write the English language correctly, rather than on some soap. It really undercuts your opinion when you can't spell. evidance -> evidence; themselfs -> themselves. Dictionary.com is a great resource. Or should I have kept that to myselves?

Posted by: funny | Feb 29, 2008 12:12:50 PM

This article is quite misleading. If you look at the photo's and click the word link you will find out that these ladies did NOT get this way by using cor silver soap ! They had actually ingested large quantities of colloidal silver supplements over a long perid of time. Use your own judgement on this one.

Posted by: Dana | Sep 11, 2007 12:20:53 PM

At the risk of sounding snobby I feel that you all are probably all slightly bitter about using Wall Marts own brand face soap are on here for a bit of a dig at soap which costs as much as groceries for the year. I have been using this soap for some time and hasn't done me any harm, but I do feel beter for using it. This forum/site is based on an idea that sprung to somebodys head and is backed up with no hard evidance. However I am open to suggestions and in the future if I am a "statistic" then I eat my words. For now though I think people should perhaps keep their invalid opinions to themselfs and only issues these warnings to the small populations of warewolves.

Posted by: Max | Jul 28, 2007 4:41:37 PM

There is no link between the build up Aluminum found in Alzheimer’s and the aluminum found in Alzheimer‘s and dementia patients. Build up of Aluminum appeared in dementia patients long before aluminum was added to antiperspirants and other products. The aluminum build up was, is and clearly studied to be a result not a cause. Aluminum occurs in many foods in the same form as the aluminum found in Alzheimer’s and dementia patients. The aluminum found in antiperspirants and other products does not match the kind found to build up in Alzheimer’s and dementia patients. You got 'merchandised' by people trying to sell their alternatives. They just had to use the word aluminum as if all aluminum is all the same. Just because something appears in a patient or person does not automatically mean that it is a cause. Jumping to conclusions is an art form perfected by marketers used to manipulate people into a belief that simply may not be true in order to perpetuate a false understanding to make a profit.

Quantities are important as to the effect of any drug or supplement. If they studied the amount of silver in Cor and found that it is at a harmless level, equal to that of things already on the market then it is probably safe. The people who suffered the hyper-pigmentation ingested silver in a greater quantity and had the effects of hyper-pigmentation soon after the start of treatment. If Cor was going to cause the same problem it would happen sooner than later. We have not heard of any of the current users having this occur. The odds of it showing up later on are very unlikely because the silver does not build up over time. Unlike so many things out there Cor has been tested and gone through the FDA approval process. It is not like so many herbal remedies and supplements out there that can make any claim without proof and get away with it. They made the choice of going through an expensive process in order to make sure their product would not harm their customers. Clearly they do not have the kind of buying power to buy into anyone’s idea of conspiracy theory at the FDA. Simply put they are not a big enough company to satisfy the idea that the FDA rushed them through the process because of payoffs and possible profit. I think that Cor is totally safe to use and rushing to judgment because the problems of another drug that is not even remotely the same in delivery to the human body and quantity is a mistake.

By the by, the exposure to metal 'nanoparticles' has to be known. You have been eating them your entire life. They are in all leafy green vegetables and mushrooms, as stated, and many other places. Thank you for using the term nanoparticles. Maybe we should all look that one up so we know how small a nanoparticle is. The silver you expose yourself to by eating everyday is thousands of time larger than nanoparticles. Are you just trying to scare people or help them?

Posted by: Adrian | Dec 6, 2006 12:36:08 PM

Gee, FDA approved!!!!
Sure makes me feel safe.

Posted by: freida | Aug 10, 2006 2:47:24 PM

Hi, just had to weigh in. I am one of the owners of Plank and we did a TON of research on this before launching Cor. Yes there are dangers in ingesting LARGE quantities of silver which can result in argyria as shown by the ladies above, but our soap has been FDA approved and you will see in the insert when you purchase the soap the FDA certificate number. The amount of silver in our soap is about the same as is in a plate of mushrooms and the liver can easily excrete any silver which is absorbed into the body via the pores of the skin. As far as a topical application, we also had clinical studies done for the FDA lab and the results were completely benign. Silver has been used in hospitals and in bandaids and topical creams for treating bacteria for a long time, so our soap is completely safe to use.


Posted by: Jennifer | Aug 10, 2006 1:48:18 PM

certainly looks zombie-esque.

Posted by: Jeff Foster | Jul 6, 2006 4:45:31 PM

The sheen reminds me of the Wicked Witch of the West, in Oz. Made famous by Margaret Hamilton.

Posted by: Mb | Jun 29, 2006 3:43:05 PM

Yeah, okay...say, what not go ahead and deny the link between Alzheimer's and Aluminum.

Posted by: Marty | Jun 28, 2006 8:52:07 PM

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