#10 Myth: Vaccines contain mercury—that’s really dangerous!
Yes, some vaccines use a preservative called thimerosal, which actually contains ethylmercury, but there’s been virtually no evidence that is can cause you harm in the low doses. However, a bigger concern is methylmercury, which is actually a poisonous quicksilver that can damage the central nervous system. Fortunately, it is not found in vaccines.
The body gets rid of ethylmercury way faster than methylmercury, making it less likely to do damage. Even when studies have suggested that ethylmercury isn’t dangerous to your health, it was taken out of childhood vaccines in 2001 to minimize any concerns and there are thimerosal-free versions of vaccines for adolescents and adults.