Treatments with formaldehyde are much more ... Not necessarily. Keratin treatments work to straighten hair, not make it grow. Can you DIY a keratin treatment at home? At-home keratin treatments ...

While this treatment is still widely popular, the Brazilian blow-dry uses formaldehyde ... looking grow-out phase. Keratin treatments don’t break the bonds inside the hair but form a smooth ...

The study discovered that women who used hair straighteners were 30% more likely to get breast cancer. Formaldehyde, found in high doses in several keratin hair straightening treatments ...