HOW and from WHAT is hair made? Everything you should know!

In order to be able to give targeted care to our hair it is essential to know the structure of our hair, i.e. to understand HOW and from WHAT hair is made .

A natural cure for your hair will only give results if you choose the remedies well aware of what your hair needs to return healthy and strong.

How could you ever understand which remedy is more suitable without knowing what the hair is like, what is its structure ?

HOW WHAT hair is made from Everything you should know

Applying cures and using hearsay remedies and just because they worked for your friend's or your mom's hair? Wish it were that simple! Remember that each hair is unique and has different needs also based on our lifestyle and consequently reacts differently to the various remedies we could try to cure them.

I know, talking about the structure of the hair may seem like a difficult and boring subject but I assure you that once the foray into this fascinating universe is over you will be left with a sense of wonder but above all you will be able to fully understand how our hair is made and how it works and why you should choose one natural remedy over another for your hair.

READ ALSO: Fine and Thin Hair? Here are 4 Essential Habits to Give Volume and Strengthen them!

I'll try to make it as least complicated and as easily memorable as possible. So shall we begin?

How are they made, what is the structure of our hair?

Hair consists of:

a visible part , i.e. the trunk / stem, which is also the dead part.
structure of the hair how the hair is madea hidden part that is located under the scalp, the living part that ensures proper growth, i.e. the root.
✓ a part that houses the hair from birth, i.e. the bulb located in the deepest part of the hair follicle .
✓ of the sebaceous and sweat glands which provide lubrication and protect the hair and scalp from external agents. The sebaceous glands produce sebum, a fatty, acidic substance with a pH of 3.5. If they are very active, they produce a lot of sebum, making the hair greasy. If, on the other hand, they produce too little, we end up with dry hair and dehydrated skin.

The sebum together with the sweat contribute to the formation of the hydro-lipid film which protects the hair from chemical (aggressive detergents) and bacterial aggressions and in addition they lubricate and waterproof the external surface of the hair as it lengthens. The shaft is lubricated even before the hair appears on the skin surface.

✓ an erector muscle capable of making the skin stand on end or give goosebumps
✓of the capillaries through which the nutrients are supplied

What is the hair shaft like instead?

Speaking strictly of the hair shaft on which, moreover, the aesthetic aspect of our hair depends, we distinguish:

1. The CUTICLE

that is, the outermost part made up of 5-6 protective layers of transparent cells (because they lack pigment), cells formed of hard keratin. These cells are arranged as if they were tiles on a roof. To get a better idea look at the photo below ↓:

hair_structure_healthy_hair_damaged

When the flakes adhere to the underlying layer, the hair is shiny and healthy. On the other hand, when the hair is dry, brittle, dull and damaged, the "scales" are open, just like the scales of the pine cone that you can see in the photo above .

Being the outermost part of the hair, the role of the cuticle is to protect the shaft from external, chemical and environmental agents. It is sufficient for the flakes to lift even only partially to make combing difficult. Often even a single bleaching treatment is able to eliminate a good amount of the cells that form the cuticle.

Obviously the cuticle is also the first part of the stem to be damaged by the high temperature of hair dryers, straighteners, curling tongs, aggressive products and/or atmospheric agents.

So based on how damaged or not, the cuticle also defines how soft and shiny our hair is.

READ ALSO: Restructuring Volumizing Pack for Fine, Thin and Damaged Hair

2. The BARK

that is, the intermediate part made up of several layers of hard keratin cells and melanin granules which is the pigment that gives color to our hair and which tends to decrease with age. The cortex is also the part that determines the shape and texture of the hair.

In dark hair, in the heart of the stem, in the medulla and in the cuticle, there is eumelanin - to which we owe the black and dark colors - while in the other types of hair (blonde, red) we find pheomelanin - to which we owe the yellow - only in the outer layer, in the cuticle while we owe the red color to trichochromes .

For example, blond hair contains both eumelanin and pheomelanin while the hair of people of Asian or African descent contains only eumelanin.

hair structure: medulla, cortex, cuticle

When, on the other hand, the cells that produce melanin no longer function properly, the hair turns white.

If the outer part of the cuticle represents approximately 10% of the thickness of the hair structure, the cortex reaches up to 80% . This part is not only the thickest but also the most fibrous because this is where the keratin is concentrated.

When the hair is very fragile to the point of breaking easily and has split ends, the damage suffered by the shaft usually goes well beyond the cuticle to the cortex.

3. The MARROW

i.e. the inner part, the heart of the hair , is made up of very large cells of spongy keratin separated from each other by cushions / air bubbles. These empty spaces present between the cells affect the more or less light / dark shade of our hair. In thin and very fine hair, the marrow is absent while in thicker hair it plays the role of "skeleton" of the stem.

The intensity of the color of our hair therefore depends not only on the melanin pigments and air cushions present in the medulla, but also on the absorption of light and therefore on how healthy or not the hair cuticle is: if the "tiles " are open and raised, the hair reflects much less light so it will also be more opaque and dull.

the structure of the hair such as what the hair is made from

But now that we understand what the structure of the hair looks like ...

What are the chemical elements that make up hair?

However complex the structure of the hair may be , the basic elements that make it up are actually few.

In addition to water , the other elements that make up the hair structure are:

  • essentially keratin: filamentous protein that is concentrated in the bark of the stem, protein composed of 18 amino acids including mainly: cystine (17.5%), serine (11.7%) and glutamic acid (11.1% ), cysteine, arginine, asparagine, proline, glycine, valine, leucine, isoleucine, etc. Keratin makes the hair waterproof and makes the hair structure elastic, resistant and robust.
  • lipids: squalene, fatty acids, triglycerides, waxes, phospholipids, cholesterol - mostly derived from sebum lipids.

  • minerals (trace elements) : iron, magnesium, zinc, copper and lead. A curious thing is how the predominance of the minerals present in the stem varies according to the natural color : if magnesium is predominant as a percentage in black hair , in brown hair lead predominates , while in red hair it is iron . Scientific studies attest that there is a real correlation between the quality and quantity of minerals and the state of health of the hair . A zinc deficiency weakens the hair and slows down its growth rate. As a result, often when our hair is particularly fine, thin and brittle it is because we have a mineral deficiency.
  • the pigments, insoluble in water, soluble in strong acids, decolorable with hydrogen peroxide.

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Considering the chemical structure of the hair, it is obvious how important a healthy lifestyle is and above all a diet rich in legumes and vegetables. Dietary deficiencies or improper nutrition will also negatively affect the structure of the hair and not just our health in general.
To conclude, it is useful to know that the hair follows a hair cycle with an average duration of approximately 2-6 years and grows approximately 1-1.5cm per month .
So now that we have understood how and what hair is made from, if you notice that your hair is brittle, dull, dry and frizzy, it is evident that it is suffering and it is essential to treat it with targeted treatments: moisturizing, "nourishing", strengthening or remineralizing. But we'll talk about this in the next article!

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Bibliography:
Bosco I.: "General Dermatology" Rome, SEU
Caputo R., Alessi E.: "Histology of the skin and skin appendages"
Duni D., Cislaghi E.: "Elements of trichology" Milan,
Enjolras O.: "One Hundred Thousand Hairs" Paris, Parente L.
Frati C., Didona B.: "Growth factors and their implications in dermatology" Chron Derm
Misciali C.: "Histological study of the isthmus of the hair follicle" Editrice CSH, Milan
http://www.antonellatosti.it/pdf/manuale-capelli-sani.pdf
Fantini F – Prevent and combat hair loss. New Techniques
Fantini - Healthy Hair - The Meeting Point Editions
Massimiliano Ricciardi - All natural hair care
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