...  Visit their website & search for it in their web. If you’re thinking about the Brazilian treatment, there’s a danger about using formaldehyde, a chemical that causes cancer. The FDA does not restrict the use of that chemical in cosmetics. Relaxers are for permanent, but they are damaging to hair. Go to the FDA website & type in permanent or relaxers so you understand what are the side effects. http://www.fda.gov/forconsumers/byaudien… Here’s the newest news: The Food and Drug Administration (FDA) recently seized tens of thousands of bottles of “Rio” hair relaxer products after determining they can cause severe hair loss or turn hair green. http://blog.taragana.com/business/2010/0… The FDA have warned consumers not to use “Rio Hair Naturalizer Systems,” a product imported from Brazil and sold through television infomercials by World Rio Corp. of Los Angeles. Some Japanese hair straightening processes can damage the hair and ...  often wear gas masks or other protective equipment and still may feel the ill effects of this potentially fatal gas. Source(s): I know hair. I have over 4 decades of hair know-how. I have silky, shiny, soft, smooth very healthy hair down to my knees. Previously damaged by perming & dyeing in the 80’s & 90’s. I’ve known people in their 30’s whose hair stopped growing from ironing their hair in the 70’s. Add your own answer in the comments!  Tags: food and drug administration, side effects, los angeles ...