Search on blog

Last blog articles

Myths about hair fibers Are they harmful to our hair? Myths about hair fibers Are they harmful to our hair?
Many times you ask us if hair fibers are harmful to our hair or if they have any side effects, today we give you [...]

MANY CELEBRITIES ALREADY USE OUR LASER HELMET (LLLT) MANY CELEBRITIES ALREADY USE OUR LASER HELMET (LLLT)
Statistics show that nearly 40% of men will start to lose their hair in their 20s to 30s, but these numbers [...]

REDENHAIR REGENERATING BRUSH VS REDENHAIR REGENERATING HELMET REDENHAIR REGENERATING BRUSH VS REDENHAIR REGENERATING HELMET
Many of you do not know what the differences are between our Regenerating Brush and our Regenerating Helmet. [...]

ENJOY THE BENEFITS OF COLLAGEN WITH REDENHAIR ENJOY THE BENEFITS OF COLLAGEN WITH REDENHAIR
El colágeno es una proteína natural de nuestro organismo que es segregada por las células del tejido conjuntivo na [...]

SANDALWOOD, ALLY IN THE FIGHT AGAINST ALOPECIA SANDALWOOD, ALLY IN THE FIGHT AGAINST ALOPECIA
In this blog post we will define what is Sandalwood, effectiveness of Sandalore and results of scientific studies.

THE PHASES OF A HAIR TRANSPLANT AND THE ALTERNATIVE REDENHAIR OFFERS YOU THE PHASES OF A HAIR TRANSPLANT AND THE ALTERNATIVE REDENHAIR OFFERS YOU
The doubts of patients when having a hair transplant are to know what are its phases, advantages and results of [...]

WHAT IS FEMALE ALOPECIA FOR AGING AND HOW TO TREAT IT? WHAT IS FEMALE ALOPECIA FOR AGING AND HOW TO TREAT IT?
The number of women who suffer from hair loss is less than that of men, but it is also very high.

LATEST TECHNOLOGY FOR HAIR BASED ON LASER LIGHT LATEST TECHNOLOGY FOR HAIR BASED ON LASER LIGHT
Redenhair's innovative Hair Regenerating Helmet aims to slow down hair loss and promote the development of hair [...]

Saltpeter and hair Saltpeter and hair
Although there are some benefits of capillary exposure to seawater and some precautions should also be taken not [...]

What is dandruff? What types of dandruff are there? What is dandruff? What types of dandruff are there?
There are different types of dandruff that are formed by completely different factors, so it is important to [...]

At what age can we start using anti-hair loss products? At what age can we start using anti-hair loss products?
Many people, especially young people, wonder if it’s possible to start using fall relief products at their age or i [...]

Does smoking affect hair loss? Does smoking affect hair loss?
You may be aware of how harmful the chemicals in cigarette smoke are to the body, but did you know that they can [...]

Stages of the hair growth cycle

- Categories : hair-care

The growth rate of hair is approximately 0.3 mm to 0.4 mm per day, depending on the person, which is equivalent to some 15 cm a year. Nonetheless, not all hair follicles develop new hair at the same time. Hair growth is produced within a closed cycle. At a given time, each hair can be found at a different stage of this cycle, and there is no synchronisation.

What are the stages of the hair growth cycle?

The hair grows from the follicle or root under the skin. Hair is fed by blood vessels in the base of the follicle which provide hair with the nourishment it requires for growth. Between the first years of growth and the hair dropping out, each hair passes through four stages: anagen, catagen, telogen and exogen.

Over time, the length of the anagen stage decreases. For this reason, the hair may become weaker and thinner after each cycle. This is why it is important to ensure that your diet is rich in specific nutrients to maintain healthy hair growth.

Anagen phase

The anagen or growing phase is the first part of the hair development cycle. During the anagen phase, the follicle cells divide rapidly, resulting in new hair growth.  In normal conditions, 80% to 90% of hair follicles are in the anagen phase at any given time.

The anagen phase can last between two to seven years. The length of the anagen phase determines the maximum length of the hair. For example, people with very long hair have a very long anagen phase.  The eyelashes, eyebrows and body hair have shorter growth phases than the hair on one’s head, which is why they create much shorter hair.

There are many factors that influence the duration of the anagen phase including genetics, nutrition, age and your general health. Stress, hormonal imbalances, medication, poor nutrition, sudden weight loss, aging and even too much styling can reduce the anagen phase. It is important to remember that the hair follicle also has its own biological clock, and when it is out of alignment or under some form of attack, this may interrupt the production of hair. The follicle is nourished by the blood vessels and, when the circulation is obstructed, the hair cannot grow.

Catagen phase

  

After the growth stage, or anagen phase, the hair enters the catagen phase.  This short transition phase only lasts for two to three weeks. During the catagen phase the hair stops growing and separates from the blood vessels, that is, from the supply of blood and nutrition.

Hair within the catagen phase is often small and discoloured, as it simply stops growing. For this reason, some people refer to it as “dead hair”.

Telogen phase

                                                                                                                                                                                                                                                                                              

The telogen phase is the stage that follows the catagen phase and tends to last around 3 months. It takes place when the follicle is at rest before the anagen phase begins once again. Cellular activity within the follicle stops, causing a halt in growth and subsequent shedding when the follicle changes shape. If the percentage of hair in the telogen phase is too high, it may cause telogen effluvium, where a general thinning of hair may be produced. This is why it is important to ensure the scalp is nourished by maintaining a healthy diet, practicing stress control and complementing your diet with nutritional supplements.

   

Exogen phase 

The exogen phase is the last stage in the hair growth cycle. In fact, it is merely an extension of the hair’s “rest period”. Eventually, the dead hair is shed, and the new hair begins to grow simultaneously.  In normal conditions, one loses around 50 to 100 hairs per day during this phase.

The exogen phase is the reason why we often see hair in the drain of the shower or on our hairbrush. We should only be concerned about this when there is a sudden change and we shed more hair than normal.

After the exogen phase, the follicle returns once more to the anagen phase and the cycle begins again.

Related posts

Share this content

Close
Click for more products.
No produts were found.

Menu

Share

QR code

Settings

Create a free account to save loved items.

Sign in

Create a free account to use wishlists.

Sign in