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You know that old anti-smoking joke that kissing a smoker is like licking an ashtray?

It turns out, wrapping your lips around a McDonald s McRib is somewhat like eating a yoga mat.

Time Magazine s Healthland blog reports that among the McRib s 70 ingredients are azodicarbonamide, ammonium sulfate and polysorbate 80.

While the amounts are very small, the blog notes that azodicarbonamide, a flour-bleaching agent that is most commonly used in the manufacture of foamed plastics like in gym mats and the soles of shoes, is found in the McRib bun.

The blog says azodicarbonamide is banned in Europe and Australia as a food additive.

Read more at Time s Healthland Blog.

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