The protein that makes up your hair, nails, and the outer layer of your skin and makes them durable and waterproof is called Keratin.
The protein that fills the gaps between the overlapping cells that make up the hair cuticle.
Keratin treatments help to repair the damage on the hair. It replaces the protein that the strands have lost due to chemical treatments, heat styling, and other damaging conditions that one has exposed tresses to.
Keratin treatment helps to rebuild the damaged areas, add shine, and eliminate frizz so the hair becomes more beautiful and easier to manage.
The treatment also gives a wide range of benefits such as adding moisture to the strands and leaving them soft, smooth, strong, and shiny.
Some keratin treatments saturate the hair with a formaldehyde solution before it's dried and flat ironed. The formaldehyde locks the hair into that straighter position.
For more details, it is important to do more research to find a safe, formaldehyde-free service, as there is no chemical that permanently breaks the hair bonds.
Several new hair-smoothing treatments use glyoxylic acid or its derivative to lock the hair into a straighter position. There's also the Keratin Complex treatment, which persuades itself as a personalised blowout with no downtime.
Though treatments with glyoxylic acid and Keratin Complex are 100% formaldehyde-free, unfortunately, they are not as powerful as the toxic stuff.
Results of formaldehyde-free treatments don't usually last more than two or three months, and these treatments won't dramatically soften the curl pattern the way formaldehyde solutions can.
These don't affect your hair bonds and are neither damaging nor effective.
Wash hair with keratin shampoos for more benefits. If you have straight hair, wash twice; and thrice if you have extremely curly hair.
Every time you get a keratin treatment, your hair becomes more brittle and prone to breakage. So, ensure you limit your in-salon-hair-smoothing treatment to no more than three times a year.