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Rinse-off products defend hair from pollution

Exposure to air pollution is considered an important external stressor for hair, which can cause damage to the cuticles (higher wet/dry combing energy), protein degradation, and a more hydrophilic hair surface.

Compared to leave-on products, rinse-off products, such as shampoo, is much more challenging to  deliver the anti-pollution benefit due to the surfactants and rinse process during hair washing. A recently developed conditioning and deposition mechanism was found to be effective in pollution protection of hair from a rinse off product. The hair tresses, washed with a silicone-free shampoo containing 0.2 wt.% acrylamidopropyltrimonium chloride/acrylamide copolymer (APTAC/ACM), showed, after the first wash, a 3-fold decrease of protein degradation after smoke exposure, as compared to no effect for the shampoos with 0.2 wt.% of  conventional conditioning polymers polyquaternium 10 or cationic guar, or untreated tresses. Almost no protein degradation by smoke was seen after a second wash. Furthermore, the tresses, washed with APTAC/ACM containing shampoo, also demonstrated anti-dust deposition benefit

Resulting from rapid industrialisation and urbanisation in Asia, air pollution and protection from it, is an increasing topic of discussion for the worldwide cosmetics market. The search however, continues to find ingredients that demonstrate a higher level of efficacy. In addition to pollution protection for skin care, research on hair care products and ingredients that address the issue is increasing.1-3 The most common external stresses to hair include not only mechanical abrasion, chemical damage, UV exposure and thermal treatment, but also exposure to air pollution.4-6 

In previous studies, we used cigarette smoke to simulate a polluted environment.7 Briefly, an experiment was performed to understand the impact of pollution on virgin hair and bleached hair. As an indicator of hair protein degradation, the tryptophan content of virgin hair, measured by fluorescence spectrophotometry, decreased after the smoke exposure. Furthermore, both virgin and bleached hair exposed to smoke pollution resulted in hair cuticle damage demonstrated by higher combing force, decrease in contact angle and visually assessed by SEM. The experiment also demonstrated that polyimide-1 delivered from a leave-on hair product can provide effective protection against such hair damage on virgin hair.7 

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Upcoming Events

in-cosmetics Global

Paris Expo Porte de Versailles
16th – 18th April 2024

NYSCC Suppliers' Day 2024

Javits Center, New York
1st - 2nd May 2024

9th Anti-Ageing Skin Care Conference

Royal College of Physicians, London
25th - 26th June 2024

in-cosmetics Korea 2024

Hall C, Coex, Seoul, South Korea
24th - 26th July 2024

in-cosmetics Latin America 2024

São Paulo, Brazil
25th - 26th September 2024

IFSCC 2024

Recanto das Cataratas Thermas Resort, Iguazu Falls, Brazil
14th - 17th October 2024

Access the latest issue of Personal Care Magazine on your mobile device together with an archive of back issues.

Download the FREE Personal Care Magazine app from your device's App store

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