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Biggest Headlines of 2010: The Keratin Straightening Controversy

Trouble for a popular hair straightening treatment, the Brazilian Blowout, started brewing back in September when Oregon's OSHA released alarming results of its study. While Brazilian Blowout products are advertised as formaldehyde-free, OSHA found higher-than-allowable percentages of the toxin in all samples tested. A similar study by the Canadian government also concluded the solution had "unacceptable levels of formaldehyde."

Everyone from the state of California to Cosmetologists Chicago has chimed in since then. The Cosmetic Ingredient Review is holding a panel to discuss the issue in the next few weeks. The makers of Brazilian Blowout, however, claim the testing methods were flawed. We're guessing this issue won't be straightened out before 2011.

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