The Latest at TRI

Dr Samuel Gourion-Arsiquaud, Director Skin & Biosubstrates, has, together with Iris Rubin MD, the founder of SEEN Hair Care, been investigating what gets left behind on your skin after you use hair products.

Remains of hair shampoo and conditioner on scalp skin cells removed by tape-stripping .

Have you ever wondered what gets left behind on your scalp, face and back after you have used a hair product? This may be more than of academic interest. Dermatologists believe that product deposits may have an important role in the development of conditions such as scalp acne. Using the advanced spectroscopy tools available at TRI, Samuel, and his team, were able to detect the remains of hair products on the skin surface. Results showed that rinse-off products are not completely removed by washing. In addition, the presence of residues from leave-on products on the skin increases with time as product is transferred from the hair. Further work is needed now to investigate the effects of these hidden remains on scalp condition. For more information, and a copy of the full article contact Samuel (


Rubin, I.K. and Gourion-Arsiquaud, S. Deposition and Retention of Hair Care Product Residue Over Time on Specific Skin Areas. Journal of Drugs in Dermatology 119 (2020)

Dr Ernesta Malinauskyte, Principle Research Scientist in Hair Care Research, has recently published two important articles on testing the damaging effects of sunlight on the hair.

Results show that artificial sunlight damage created in the laboratory correlates with natural weathering.

Most consumers are aware that exposure to UVB and UVA radiation accelerates skin aging and increases the risk of skin cancers such as melanoma. However, fewer individuals are aware that their hair is also affected by UV radiation. Ernesta, and the team at TRI, have developed new techniques to simulate sunlight damage to hair in the laboratory. Their tests have shown that exposure to solar radiation negatively affects hair protein structures and hair mechanical properties. The protocols developed at TRI are now being used to test sunscreens and antioxidants for the hair. Clients interested in screening their products should contact Ernesta (


Malinauskyte, E. Effects of solar radiation on hair: Will your products protect against it? Euro Cosmetics 4, 22-25 (2019) - Contact Ernesta for a copy ( Giancola, G. and Malinauskyte, E. Adaptive Measures: Translating UV Protection to Hair Claims. Cosmetics & Toiletries Magazine, April ,35-46 (2019)

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