In this article, we would like to share the hair thermal damage model conducted by CIRS Testing and Amway (Shanghai), as published in the Journal of Cosmetic Dermatology. The frequent use of hair dryers can cause thermal damage to the hair. Currently, there are various hair care products aimed at repairing thermal-damaged hair emerged on the market, making it necessary to establish a convenient and stable hair thermal damage model to evaluate the efficacy of such products.
Today, let’s talk about tear trough and lacrimal groove evaluation. Currently, many skin care products claimed that they could mitigate the tear trough and the lacrimal groove. Actually, tear trough and lacrimal groove are two different periorbital issues. Sometimes they conflated, likely because they often coexist.
Two-photon microscopy (TPM), a high-resolution three-dimensional imaging technology based on nonlinear optical effects, has demonstrated significant application potential in the field of cosmetic efficacy evaluation in recent years. Its core advantages lie in its non-invasive, in vivo, in situ, label-free real-time imaging capability, enabling deep observation of dynamic changes in cells and the extracellular matrix within skin tissue. This provides a scientific basis for evaluating the safety and efficacy of cosmetics.
