I've tried a few of these Keratin straightening treatments now and I've definitely decided that the best products really do come from Brazil. After all that's where the Keratin Treatment began life, and Escova Progressiva - as the process is known in Brazil - has been around since 2004. Plus the use of Formaldehyde is banned in Brazil, and manufacturers are required by law to print their ingredients on the packaging, which makes 'Brazilian Blowout' style deceptions impossible. I've been a regular user since about 2008, and in that time my hair has completely transformed from frazzled out, bleachy blond to a silky smooth sandy colour. Not straightening my hair every day has really improved the conditioner, even though I swim in the sea 3, 4 or even 5 times a week. I'd say, go Brazilian every time.