A Brazilian blowout and a keratin treatment are both hair-smoothing treatments that temporarily coat the outer layer of the hair to smooth the hair, remove frizz, enhance shine and decrease blow-drying time. ... But while both treatments calm frizz and smooth strands, there is a difference when it comes to intensity. Keratin treatments may be able to straighten hair, but they damage it in the process. This is because keratin treatment products contain ingredients other than keratin (such as formaldehyde) and the high heat of the styling tools used can burn and break hair, causing it to shed. Brazilian Blowout Hair Straightener Is Dangerous. ... It described Brazilian Blowout as a "notorious hair straightening products company" and said it found levels of the liquid form of formaldehyde ranging from 8.7% to 10.4%.The Brazilian Blowout will last for up to 12 weeks if the Açai After-Care Maintenance product line is used. The Brazilian Blowout is a cumulative treatment, in that the more you receive it, the healthier the hair will be and the longer the result will last.

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