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Dangerous Levels of Mercury Found in Some Skin-Care Products Bought on Amazon and eBay

ou may have heard that mercury can lurk in things like sushi and dental fillings, but it turns out that dangerous levels of this toxic heavy metal can also be found in skin-care products, particularly those from foreign countries. And while that last part may make you breathe a sigh of relief, there's still plenty of reason to be cautious about what you're applying onto your skin. Even though skin-care products containing an abundance of mercury aren't made in or technically available for sale in the U.S., it's possible they could still be purchased and shipped straight to your doorstep via online retailers like Amazon and eBay. This was the case when advocacy groups recently purchased products for testing.

What's the deal with mercury in skin-care products?

Recently, 51 advocacy groups sent public action letters to both e-commerce giants, calling on them to "stop marketing illegal mercury-laden cosmetics" and "to ensure that cosmetics found to have mercury levels over 1ppm are no longer offered for sale" after testing revealed that many of them contained extremely high levels of mercury. For context, in the U.S., the legal limit of mercury that can be present in cosmetics formulas, which was set forth by the Food and Drug Administration (FDA) back in 1973, is just one part per million (ppm).

According to the letters sent to Amazon and eBay, skin-care creams were purchased by some of the advocacy groups and their mercury levels were tested. Shockingly, one of the test results revealed mercury levels 30,000 times the legal limit.

Why is this an issue?

"Most Americans are aware that mercury is dangerous, but many people don't realize that [it's] sometimes used as the active ingredient in skin-lightening creams," explains Melanie Benesh, a legislative attorney for the Environmental Working Group (EWG), which was one of the advocacy groups behind the letters and who issued a press release about the findings. "Mercury cannot be used more than 1ppm in skin creams, but the FDA lacks resources to adequately police the marketplace."

The main reason that mercury is used in moisturizers, as Benesh explained, is as a skin "lightener." Mercury can act as a bleaching agent, and it also holds certain preservative properties (which means it can help elongate a product's shelf-life). It's also an inexpensive ingredient. In cosmetics, high mercury levels are most commonly found in products that promise to fade dark spots, blemishes, and fine lines. "Mercury is an effective material for skin lightening, with rapid results, but the price outweighs the benefits," explains cosmetic chemist Ginger King. It's a poison that can damage skin and even organs, she adds.

How is mercury hazardous in products?

That being said, mercury is highly toxic. When applied topically, mercury is associated with the development of skin irritation, rashes, and discoloration, says Joshua Zeichner, director of cosmetic and clinical research at Mount Sinai Hospital in New York City. "If it's absorbed, [it] can even cause mercury poisoning with toxicity to the kidneys and nervous system."

Indeed, the World Health Organization (WHO) states that the primary adverse effect of mercury in skin-care products is kidney damage. And, in addition to what Zeichner noted, it can also cause anxiety, depression, and even psychosis. Long-term use of cosmetics that contain mercury can cause damage to the eyes, lungs, digestive, nervous and immune systems. So yeah, it can be pretty toxic stuff.

Exposure to mercury could come from your environment as well

"We know that inhaling mercury vapor can be harmful to your health," explains Zeichner. "We don't know what effect mercury containing creams have on the air, so that is even more of a reason to avoid these products."

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