Quanto crescono i capelli?

Do you know how much hair grows?

Here are the regrowth cycles

Life stages of the hair

Hair growth and regrowth

The hair regrowth cycle is the physiological process through which your hair is renewed.

In fact, contrary to popular belief, the hair is not always the same from birth to death.

During the life span of a human being, every hair on the scalp repeats its regrowth cycle several times:

is born,

it develops,



and so on.

For this reason, daily hair loss, within certain limits, should be considered physiological.

Losing hair at a rate of 35 per day is average.

Where the number of hairs falling out is significantly higher, the phenomenon should be considered as an alarm bell.

In fact, there are individuals who, boasting thick hair from birth, are subject to physiological hair loss that can reach up to 90/100 per day.

Consequently, hair loss must always be commensurate with the particular characteristics of each one and is influenced by various factors such as seasonality, genetic heritage and hormonal balance.

If, taking these factors into account, we detect pathological hair loss or evident anomalies of the scalp, it is important to intervene in time before the hair follicles atrophy and become unproductive.

A follicle atrophies when it runs out of genetically predetermined hair regrowth cycles.

Considering that the life cycle of a healthy hair varies between 2/4 years for men and 5/6 for women, and that it repeats itself even 20 times in a lifetime, we can well understand how follicles that remain unproductive when you are 20 years old, but also 30 or 40, it means that they have significantly reduced the duration of each cycle until they become prematurely unproductive.


Hair regrowth in follicles

More than follicles we should always speak of follicular units, since within the follicle the same dermal papilla often gives rise to more than one hair.

Each follicular unit is made up of 1, 2 or 3 (rarely 4 or 5) hair fibers, wrapped in a collagen band.

Each fiber has its own erector muscle (which is responsible for the "goosebumps" effect which, by contracting in the cold, straightens the hair) and the relative sebaceous glands.

The pilosebaceous apparatus, thus formed, ensures hair growth at a rate of about 0.30 millimeters per day.

Unlike animals that have hair loss concentrated in certain periods of the year (moult), in humans the process of hair regrowth (anagen, catagen and telogen) is continuous, and the physiological turnover is imperceptible.

In practice, human hair is born, grows and dies according to a cadence that guarantees a constant percentage of hair at any time of the year.

Only in spring and autumn there is an "acceleration" of the turnover (physiological seasonal effluvium).

When the hair reaches the end of its life and falls out, it deposits the dermal papilla at the bottom of the follicle which, after a rest period of about 4/5 months, begins a new process of mitosis (the division of a cell into two cells having the same characteristics) and the hair matrix begins to give life to a new hair and its constituent elements: the epidermis, the cortex and the medulla.

Once the hair bulb is fully formed, the hair is pushed towards the surface of the scalp.

It is usually the new hair, during the growth phase, that pushes out the old hair now at the end of its growth cycle.

This explains the hair we find on the pillow in the morning, the hair that remains on the comb or we lose after shampooing.

Until the hair that falls out is replaced by new, healthy hair, there is no precondition for baldness, but as the new hair begins an increasingly shorter regrowth cycle, the end result is premature extinction.

To avoid this event, it is necessary to resort to hair regrowth treatments before it is too late.

In the same head of hair thicker and stronger hair has a longer life cycle than thinner hair.

Identifying the causes of hair loss therefore means discovering the factors that disturb the regular hair regrowth cycle.

The hair regrowth cycle (or life cycle) consists of 3 macro phases:

Hair life stages

  • ANAGENA : Anà = up, above + genà = genesis, birth
  • CATAGENA : Katà = down + genà = genesis, birth
  • TELOGENA : Telòs = end, end + genà = genesis, birth


It is the hair growth phase.

Its duration varies between 2 and 4 years in men, between 5 and 6 in women.

Approximately 85-90% of hair in healthy hair is in this phase.

The ANAGEN phase is to all intents and purposes an active phase because the hair never stops growing.

In this phase the bulb supports a very intense metabolic activity of nourishment and growth.

Furthermore, the dermal papilla is introflected into the fundamental matrix of the hair and for this reason it is in direct contact with the nerve endings and blood capillaries of the dermis which oxygenate and nourish the hair, supporting its rapid regrowth.


It is the phase of progressive suspension of the vital functions of the hair.

It lasts about 1/3 weeks, the time necessary for the bulb to go back up to the collar and lose the internal epithelial sheath.

The CATAGEN phase is characterized by a rapid decrease in cell division (mitosis), until this function ceases completely and the bulb detaches slightly from the follicle, rising towards the surface of the dermis.

In practice, hair growth during the catagen phase is much slower and more decisive.

This phase is easily recognizable because the hair begins to show the first signs of undernutrition: thinning of the bulb in relation to the size of the hair shaft.

Eventually, the bulb remains connected to the dermal papilla via a fine cell column (the last cells produced by the matrix).

Meanwhile, the melanocytes also stop their metabolic activity, while the hair reduces its vital functions until it ceases altogether.


It is the resting phase of the hair.

It lasts 2/4 months, the hair is still in the hair follicle, but vital activities have completely ceased.

It is a hair that no longer has oxygen and nourishment from the dermal papilla and remains weakly stuck in the follicle.

Having finished its growth phase, the hair root shows a "club" shaped bulb, very thin and with jagged edges.

To the naked eye, this now atrophic bulb looks like a pinhead at the base of the hair.

It often alarms patients who believe they have lost the germinative part of the hair, which instead has remained lodged deep in the hair scalp ready, if everything proceeds regularly, to start hair regrowth, a new ANAGEN phase.

Hair in the TELOGEN phase is sometimes removed from the scalp with a modest pull, without realizing it, such as when scratching the head. In case of telogen effluvium hair loss can be really huge.

Sometimes hair falls out because it is mechanically stressed by combing, brushing or because new hair in the anagen phase pushes it out of the follicles in which it is located.

If the resting hair is removed mechanically, the follicle interrupts its rest and prematurely initiates a new anagen.

As a rule, in healthy hair, about 9-14% is in the TELOGEN phase; if this percentage rises to 20% we can speak of a modest and incipient alopecia; while a percentage of 30% means that there is an important alopecia. It should be noted that in children, as a rule, the percentage of hair in the TELOGEN phase does not exceed 5%.

This is why "their" hair grows back so abundant.

If you are afraid that your hair may have an abnormal fall, that is outside the classic seasonality as I explained in the paragraphs before, then do not waste time and try the KRECITA Anti-Hair Loss Treatment.

The result I guarantee you is to return to having the hair of when you were younger, with strong and resistant hair.

And the amount of hair on the comb or in the bathtub will gradually reduce, obviously by applying the treatment on a regular basis, i.e. 2 times a week, WITHOUT MASSAGING THE HEAD.

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