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Inulin, a natural agent with intriguing benefits for hair?

Inulin is a natural active ingredient found in many plants. Referred to as "Inulin" in the International Nomenclature of Cosmetic Ingredients (INCI), it is most commonly incorporated into hair care products. However, is there a benefit to using inulin on the hair? Discover the answers in this article.

Summary
Published May 5, 2024, updated on May 21, 2024, by Kahina, Scientific Editor — 3 min read
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Does Inulin affect the hair?

Inulin is a prebiotic fiber commonly found in plants such as chicory and Jerusalem artichoke. This compound has recently begun to be used in hair care products, such as shampoos, conditioners, masks, serums... In these products, inulin is attributed with moisturizing properties for the hair fiber and it is believed to rebalance the skin microbiota, thus preventing the onset of skin conditions on the scalp.

However, it should be noted that there are no scientific studies that report any benefits of inulin for the hair.

However, we can hypothesize about the potential benefits it might have on hair. Indeed, Edyta SZMUC and her team evaluated the antioxidant properties of extracts from Jerusalem artichoke and chicory. Inulin was isolated from the plants and was applied in formulations at 1; 2.5, 5; 7.5, and 10%. The inulin extracts showed an ability to neutralize reactive oxygen species depending on the concentration.

At 10%, the free radical trapping capacity was equal to 80% for Jerusalem artichoke and 71% for chicory. Inulin would function as a free radical scavenger, produced by oxidative stress (pollution, UV rays, tobacco, etc.). Therefore, it will prevent skin damage from free radicals such as the degradation of dermal fibers, but not only that.

Various studies have shown that photo-aggravation of the hair aging process through oxidation leads to a decrease in hydration and a stiffening of the hair fiber, linked to lipid oxidation. The photochemical protection of hair proteins, such as keratin, is provided by hair pigments that absorb and filter radiation, then dissipate this energy as heat.

However, when they act to preserve these proteins, the pigments themselves can be altered or discolored, leading to the formation of gray hair. It is conceivable that inulin, due to its antioxidant action and by preventing lipoperoxidation, could protect the hair from the influence of oxidative stress. As a result, they would be less dry and less irritating. Furthermore, it could play a role in the prevention or reduction of hair graying by preserving hair pigments. Again, this is only a hypothesis.

Sources

  • LEE W. S. Photoaggravation of hair aging. International Journal of Trichology (2009).

  • SZMUC E. & al. Inulin as an effectiveness and safe ingredient in cosmetics. Polish Journal of Chemical Technology (2019).

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