That mysterious jar of beauty cream promises to reverse aging or lighten your skin, but does it contain a dangerous ingredient?

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The Food and Drug Administration is warning consumers about an increase in skin cream products produced abroad and sold illegally in the United States that contain mercury, a highly toxic chemical. The products typically claim to remove age spots, blemishes or wrinkles. The FDA has found these products for sale at specialty shops in Latino, Asian, African and Middle Eastern neighborhoods. The products also make their way to the United States when tourists buy them abroad and bring them home, thinking they have discovered a magic elixir unavailable in the United States.

The FDA says if a drug or cosmetic does not have an English label or doesn't list any ingredients, it is not approved for sale here.