Brazilian keratin?
 

Has anyone run across any scientific studies re: Brazilian keratin hair straightening and cancer risk?

Re: Brazilian keratin?
 

Not likely that there would be any studies specific to Brazilian keratin products, because the carcinogen some products contain--formaldehyde--has been tested many times.

OSHA has labeling requirements for products that contain formaldehyde,

http://www.osha.gov/SLTC/formaldehyde/hazard_alert.html

but it appears that some of the manufacturers think that playing word games solves the problem:

http://www.ewg.org/hair-straightener...-formaldehyde/