Keratin Treatment is a permanent straightening system containing keratin and amino acids. Keratin straightens 90-100% of your hair and is formaldehyde free. Keratin Treatment is intended for very thick hair. We do not recommend combining a keratin treatment with a bleaching service. Hair botox or nanoplastia is a healthier alternative if you are looking to combine a balayage or highlighting service. Keratin treatments lasts 6-8 months.