Keratin hair treatments popular, but draw health warnings
http://www.chicagotribune.com/health/ct-x-n-keratin-hair-treatment-20110126,0,4722098.story
"Presence of formaldehyde has agencies issuing alerts about products, but some in the industry insist they are safe"
http://www.chicagotribune.com/health/ct-x-n-keratin-hair-treatment-20110126,0,4722098.story
"Presence of formaldehyde has agencies issuing alerts about products, but some in the industry insist they are safe"
