"Keratin treatments are a semi-permanent hair straightening treatment that smoothes and adds shine to frizzy hair,"
How the treatments work is not through the use of keratin, though.
To make hair smoother and straighter, a solution containing a formaldehyde derivative or (the much safer) glyoxylic acid is worked through the hair to break the bonds and reseal them in a straighter position.
The solution is then blow-dried and sealed with a flat iron, and the results can last anywhere from three to six months.
While similar to other hair straightening treatments, keratin treatments are still distinctively different.
Who have frizzy hair and want long-term straight and smooth hair.
"The chemicals with keratin are a little less harmful than those found with other straightening treatments, like a relaxing treatment, which is very harsh."