Keratin is often used in hair treatments.
Keratin is a type of protein that contributes to the hardening of the surface layer of the skin and hair , feathers , hooves , horns and other derivatives . It has a high amount of sulfur and a structure that is classified as secondary , since this bioprotein takes a spiral shape when folding on itself.
Before moving forward with the meaning of the term, we can proceed to know its etymological origin. Thus, we come across the fact that, as established in the dictionary of the Royal Spanish Academy ( RAE ), it derives from the Greek keratine , which can be translated as "horn" .
Types of keratin
According to the components, it is possible to differentiate between different types of keratin. Alpha keratin includes cysteine monomers that form disulfide bonds. These bridges provide great resistance : thanks to the presence of alpha keratin, the nails and horns of animals are so hard.
Beta keratin , on the other hand, does not have these bonds since it lacks cysteine. It is a protein that cannot be extended and appears in structures such as the webs that spiders weave.
It is important to note that alpha keratin can be converted to beta keratin. For this, certain treatments must be applied that modify the chains and bridges of the protein, at least temporarily.
Gelatin is a food with a high amount of keratin.
Hair treatments
Thanks to these properties, keratin hair treatments are very popular. They are used to straighten and moisturize hair , having the advantage of not causing damage to the scalp unlike other treatments. The application of keratin to the hair also strengthens and repairs it, preventing breakage.
Currently, many people do not hesitate to resort to keratin treatment for straightening, although this brings with it both advantages and disadvantages. Regarding the favorable aspects, the following stand out:
- The problem of hair frizz is significantly reduced.
- The hair is hydrated for at least three months.
- Keratin helps hair remain unchanged, even though it may be exposed to changes in humidity, snow, rain or temperature.
- The hair becomes more radiant and shiny.
On the other hand, those who highlight its disadvantages highlight the following:
- Some of its components may be harmful to the hair.
- The price of a keratin treatment is usually high.
- Treatments with this type of substance must be carried out approximately every three or four months.
- After undergoing keratin, the person will not be able to wash their hair until three days have passed and they will not be able to use rubber bands or other hair accessories until two days have passed.
Keratin in food
Finally, there are foods that are rich in keratin, such as certain yogurts and gelatins.
In this way, benefits for the skin , nails and hair can be incorporated through diet.