What are the benefits of squalane for hair?

The squalane is the hydrogenated form of squalene, a lipid naturally secreted by the sebaceous glands and accounting for about 15% of the composition of sebum. Synthesized at the scalp level, it then naturally flows along the hair fibers while coating them. Sebum is important for the health of the scalp and lengths and ensures their hydration and protection. However, as we age or due to hormonal variations, sebum production may become insufficient. An external supply of lipids, such as squalane, can then be beneficial. Indeed, due to its double bonds on its carbon chain, squalene is unstable to oxidation. That's why it is generally substituted with squalane, especially in hair care products like serums, shampoos, conditioners...

• Interesting properties of squalane for the scalp?

  Just like the skin, the scalp is sensitive to sun exposure, wind, cold, and pollution. These various factors can be likened to real assaults on the scalp, generating oxidative stress in skin cells or destabilizing the hydrolipidic film on its surface, thereby increasing water loss. However, a scalp that is weakened or dehydrated leads to numerous discomforts, such as itching or dandruff.

  To avoid them, it may be beneficial to use squalane. Easily absorbed by the epidermis due to its biomimetic chemical structure, this active ingredient is known for its moisturizing properties. By depositing a protective film on the surface of the scalp, squalane helps to maintain its hydration. Moreover, it can insert itself between the cells of the stratum corneum to strengthen the intercellular cement, thereby reinforcing the skin barrier. Although squalane does not have a greasy texture, it is recommended to shampoo 15 to 30 minutes after its application.

  Note : It is important to clarify that the moisturizing and protective properties of squalane have not been tested on the scalp. However, they have been demonstrated in clinical studies.

• Does squalane provide benefits to hair?

  Squalane can also be used on hair lengths, where it performs a similar hydrating role by strengthening the hydrolipidic film surrounding the hair fibers. The maintenance of this film is crucial to ensure their flexibility and shine. Indeed, a study has shown that the application of squalane on hair could be beneficial as this active ingredient does not evaporate and remains on the surface of the cuticle, the outermost layer. It thus helps to ensure the impermeability of the internal layers of the hair fibers such as the cortex, largely responsible for the sensory properties of the hair. Squalane is also credited with a coating effect. It would indeed help to discipline and style the hair. However, this property of squalane has not been scientifically proven.

• Final Report on the Safety Evaluation of Squalane and Squalene. International Journal of Toxicology (1982).

• LEROY F. & al. Wetting and Electrical Properties of the Human Hair Surface: Nanoscale Observation of Delipidation. Journal of Colloid and Interface Science (2007).

• KARADENIZ F. & al. Biological significance and applications of squalene and squalane.Advances in Food and Nutrition Research(2012).