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Propriétés argile jaune cheveux.

Yellow Clay: What are its benefits for hair?

Yellow clay is gentle and less irritating than other types of clays. In addition to its benefits for the skin, it can also be used to improve the condition of hair, and more specifically, the scalp. Learn more about the benefits of yellow clay in hair application.

The yellow clay, in brief.

Clay is a sedimentary rock abundant in trace elements and minerals (silica, magnesium, potassium, calcium, zinc, copper...). Its properties vary depending on its color. This color is determined by the nature and proportion of the minerals it contains. Thus, there are yellow, green, pink, white clays... Like other clays, yellow clay, also known as yellow illite, is extracted from rocks sedimentary. This natural mineral owes its coloration to the presence of a natural ochre pigment. Compared to other clays, yellow clay is renowned for its gentleness and non-irritating effect. It is therefore the ally of skin and sensitive scalp.

Yellow clay to mattify the scalp.

Matifying, yellow clay is an ingredient often found in shampoos or masks intended for individuals whose hair quickly becomes oily. This ingredient is indeed capable of absorbing excess sebum at the scalp level and ridding it of impurities. Yellow clay thus leaves the hair light and soft. By preventing the accumulation of sebum, it also helps to combat dandruff. Studies have indeed shown that in some cases there is a link between overproduction of sebum and the appearance of dandruff. This is explained by the fact that dandruff is sometimes due to the proliferation of Malassezia type fungi that feed on sebum.

Yellow clay has antimicrobial properties.

Yellow clay also possesses adsorbent properties, derived from its ionic composition and crystalline structure. Indeed, yellow clay carries a negative charge at its core and a positive charge on its surface. This charge difference allows it to bind certain microorganisms to its surface for elimination. Thus, the application of a treatment enriched with yellow clay contributes to "purifying" the scalp and cleaning it.

Yellow clay could potentially prevent the occurrence of split ends and white hair.

Yellow clay is composed of several metals, some of which possess antioxidant properties. This is particularly the case with iron, which is capable of neutralizing free radicals through an electron donation. These reactive species can potentially weaken the hair follicle, and promote hair loss and split ends. Therefore, the hair application of yellow clay has a protective effect on the hair and limits the effects of exposure to UV radiation and pollution.

Furthermore, it slows the appearance of gray hair, which a study has shown to be correlated with the presence of free radicals. Indeed, although the mechanism by which these operate at the level of hair fibers remains poorly understood, it seems that free radicals could trigger a chain reaction leading to the degradation of melanin, the pigment that gives hair its color.

This pertains to indirect evidence, as no study has demonstrated that yellow clay itself prevents the occurrence of split ends and white hair.

Yellow clay is said to strengthen the hair follicle and hair fiber.

The presence of copper in yellow clay suggests that this ingredient may have a strengthening effect on the hair bulb and hair fiber. Indeed, this metal plays a role in the synthesis of collagen, a protein that surrounds and structures the follicular units. Additionally, copper is necessary for the activity of lysyl oxidase, the enzyme that catalyzes the formation of aldehydes from lysines. The aldehydes produced during this reaction then assemble together, which leads to the cross-linking of collagen fibers.

According to some studies, collagen may stimulate the synthesis of keratin, the main component of hair. This fibrous protein contributes to the structure and protection of hair fibers. It makes up the scales of the cuticle, the outermost layer of the hair. This layer ensures the impermeability of the hair fiber and the protection of the cortex.

Let's note that once again we are dealing with indirect evidence, as scientific studies have not been conducted on yellow clay, but rather on copper, antioxidants, and collagen.

Sources

  • CARRETERO M. Clay minerals and their beneficial effects upon human health: a review. Applied Clay Science (2002).

  • SEIBERG M. Age-induced hair greying - the multiple effects of oxidative stress. International Journal of Cosmetic Science (2013).

  • Thèse de François HERNOT. L’argile, son utilisation à l’officine (2016).

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