The microbiota plays a role on the scalp. When it is rebalanced, this reflects on the hair which gains in strength and shine. Explanations and advice.
What is the microbiota exactly?
Our skin hosts an average of 1,000 billion bacteria and around 1,000 species of fungi, viruses…
All these micro-organisms live on the surface and in the superficial layers of the epidermis, constituting a complex ecosystem. They feed on lipids, proteins and other compounds made by the skin. This microbiota varies in quantity and quality from person to person depending on age, sex, immune system and certain factors such as humidity, pH and temperature.
Why is this flora so important?
Because a healthy microbiota is the guarantee of healthy hair! From our birth to our death, this flora composed of micro-organisms colonizes our skin, including the scalp. And continues to evolve over time. It thus forms our first line of defense against external attacks. It is a developed ecosystem, which researchers have been studying for ten years to understand its precise role.
What happens when there is an imbalance in the microbiota?
All this little world normally lives in harmony. But if a disturbance occurs (bad rituals, use of unsuitable products, etc.), that is to say if certain bacteria proliferate to the detriment of others, the virtuous circle is then broken.
- The hydrolipidic film is altered. As a result, the protective function of the scalp is less well assured.
- Inflammation occurs : tingling, heating or itching…
- The imbalance sets in and the very nature of the scalp is changing. It secretes more sebum and becomes greasy.
- Assaulted by antimicrobial active ingredients derived from chemistry, the scalp becomes drydesquames, which can lead to a dandruff condition.
- The scalp loses its vigor, the fiber becomes thinner, dull and brittle. Ultimately, this can also cause a Hair loss.
How to act effectively?
The principle is to strengthen the bacterial and microbial balance, as much as the barrier function of the scalp by providing various elements.
- Prebiotics. These are fibers and sugars that will feed the good bacteria and thus support the skin barrier.
- lactic acidwhich creates a favorable environment for the harmonious development of bacteria.
- Fermented rice waterrich in pre and postbiotics, traditionally used by Asians to wash their hair.
- An ultra-gentle cleansing base which does not foam, in perfect harmony with the pH of the scalp (around 4).
Is the microbiota of this area specific?
Due to its warm and humid environment as well as its richness in sebum, the scalp is home to many yeasts, in particular from the Malassezia family, responsible for dandruff and some seborrheic dermatitis. When it comes to bacteria, the most common are C. acnes and S. epidermidis, but there are also local populations that are thought to synthesize vitamins and nutrients essential for hair growth.
Are all types of scalps concerned?
Above all sensitive, oily or dandruff scalps. But research on this microbiota is in its infancy. Cosmetics groups are just beginning to communicate on the issue. For Marie Drago, doctor of pharmacy and creator of the Gallinée brand, the approach was obvious: “We think it is wiser to preserve this microbiota than using harsh shampooswhich will strip it and unbalance it”. Most shampoos for problem scalps incorporate antibacterial active ingredients and exfoliating ingredients… This new approach makes it possible to treat and soothe the problems of irritation and dandruff. But it is also interesting for all types of hair, which are often subject to aggression (colouring, pollution, smoothing, etc.) Just alternate with your usual care, provided that their formula is not aggressive. .
What are the right steps to take?
It is necessary to remove shampoos and other products that are too aggressive. And use those that respect the ecosystem of the scalp and promote good bacteria, so prebiotic care. A virtuous circle is quickly re-established, which makes it possible to space out shampoos since the skull regains its natural balance. Better nourished, the hair fiber also benefits from this change, gaining strength and shine.
3 scalp treatments
- Rebalancing
Without foam, this cleansing cream cleanses, calms irritations (mafura vegetable oil), relieves itching and leaves hair clean with a natural finish.
Soothing cleansing cream, Gallinée, €25 for 200 ml.
- Anti-greaser
Its sulphate-free cleansing base gently cleanses while sage hydrosol, burdock extract and active probiotics regulate excess sebum, purify and improve hair quality.
Volumizing freshness shampoo, Daydry Probiotics, €13 for 200 ml.
Read also
- The benefits of probiotics for the skin
- What is a good conditioner
- What is a good organic shampoo
- Hair loss and cancer: taking care of your scalp
