Brazilian Hair Straightening

    Women are raving about Brazilian hair straightening, which contains keratin and formaldehyde (a hazardous cancer-causing chemical).

    Not to be confused with Brazilian waxes, which come with their own set of life-threatening perils.

    Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.