Welcome to this week’s I Call Bullshit. This week we’re going heavy metal. Silver is starting to acquire a cure-all gloss, as people attribute all sorts of amazing powers to it. It can kill werewolves! And microbes! And de-stink stinky sneakers!

As a disinfectant, it’s not just a Band-aid gimmick; it actually does help treat infections and is being used more often as superbugs get a foothold in our hospitals – although some experts warn that its very effectiveness could eventually just create more resistant strains of bacteria.
So if it’s good embedded in wound dressings, it must be even better if tiny particles of the stuff are suspended in liquid and downed in one, right? Well, hate to make you blue, but I call bullshit.
It’s the same sort of magical thinking I use when, having heard of the protective effects of alcohol-based hand sanitiser, I decide to just drink an alcohol-based liquid instead. Only less fun.
Hawkers of colloidal silver claim it treats thrush and athlete’s foot and other yeasty type infections, arthritis and allergies and warts, and of course the eternal pots of gold at the end of the alternative medicine rainbow, cancer and AIDS.
There’s no evidence for these claims, but the retailers like to claim shaky links to its proven uses purifying water and as an antiseptic. They also use the fuzzily false claim that it’s an ‘essential mineral’, which ranks up there with ‘natural’ when it comes to evaluating the effectiveness of a product. There are no reputable published articles proving it is therapeutic, and in the US the FDA has taken action against some manufacturers for their false claims.
Here’s a handy rundown from the National Institutes of Health’s National Centre for Complementary and Alternative Medicine. Take-home points are: Scientific literature does not support the use of colloidal silver for therapeutic uses claimed, and using it can cause some pretty severe side effects.
The Therapeutic Goods Administration has not approved colloidal silver for therapeutic uses, and also says there are safety concerns with its use. But it’s not illegal here because it does have legitimate uses in water purification. See their website for more information.
What’s missing from the TGA website though, is the most spectacular side effect of overuse of colloidal silver. It can turn you blue.
‘Argyria’ occurs when the silver particles are deposited in the skin.
Turning the skin blue. Well, gray-ish or purple-ish to be more accurate. It happened quite spectacularly to Paul Karason, who used colloidal silver to treat his dermatitis. Here he is:

Then there was US Senate candidate Stan Jones, whom the BBC sensitively described as “having a case of the blues”.
So. Plenty of claims, no evidence, spectacular side effect that most of us probably wouldn’t cope with quite as cheerfully as Mr Karason up there.
Rolled-gold bullshit.
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