Detailed text transcripts for TV channel - KGO - 20120613:10:20:00
>> it is winding up in your respiratory system. be very concerned about potential for lung cancer. it needs further investigation. >> reporter: one of the half dozen medical experts concerned after reviewing ten lab studies obtained by abc about the chemical dha. one calls it a potential human health hazard. another says it can cause dna damage which could lead to birth defects. the fda is clear, dha should not be inhaled or ingested and tells consumers to protect their eyes, nose and lips. when we sent our hidden cameras to a dozen salons, every salon, discouraged us from wearing protective g...