Stolecka-Warzecha Anna, Wilczyński Sławomir, Pawlus Agnieszka, Lebiedowska Agata, Chmielewski Łukasz, Niezgoda Zuzanna
Department of Basic Biomedical Science, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland.
Department of Motion Organ Reconstruction Surgery, Provincial Specialist Hospital Megrez, Tychy, Poland.
Clin Cosmet Investig Dermatol. 2023 Sep 26;16:2663-2675. doi: 10.2147/CCID.S423667. eCollection 2023.
Infrared radiation (IR) has a wide spectrum of both positive and harmful effects on the human body. Negative properties, manifested by increasing the level of reactive oxygen species (ROS), affect the skin ageing acceleration. Other adverse effect of infrared exposure is related to its ability to significantly penetrate deep into the skin, between its layers, up to blood vessels and other tissues and warm them up. Due to its harmful effects, protecting the skin against infrared radiation becomes an important issue.
The aim of the research was verifying the usefulness of filters available on the market with protection against infrared radiation declared by the manufacturers, by examining their impact on the directional reflectance of the human skin.
A group of 27 people was gathered, to obtain the results. Four products were applied on the participant's forearm skin, and then measurements of the directional reflectance of the skin were made at successive time points, using the 410-Solar reflectometer. The collected data was analyzed, and showed changes in reflectance under the influence of the applied protective products.
The products used in the study showed a statistically significant effect on the directional reflectance of the human skin in near infrared radiation range and little effectiveness for higher wavelengths.
The results indicate that the selected products show radiation protection against IR radiation only after several dozen minutes of application, which may suggest that they must penetrate deeper skin layers to be effective. Hemispheric directional reflectance turned out to be an effective method allows to assess the effectiveness of protective properties of cosmetics.
红外辐射（IR）对人体具有广泛的正负两方面影响。其负面特性表现为活性氧（ROS）水平升高，会加速皮肤老化。红外暴露的另一个不良影响与其能够显著深入皮肤各层、直达血管和其他组织并使其升温的能力有关。鉴于其有害影响，保护皮肤免受红外辐射成为一个重要问题。
本研究的目的是通过检测市售宣称具有红外辐射防护功能的滤光片对人体皮肤定向反射率的影响，来验证其有效性。
招募了27人以获取研究结果。将四种产品涂抹在参与者的前臂皮肤上，然后使用410型太阳反射仪在连续的时间点测量皮肤的定向反射率。对收集到的数据进行分析，结果显示涂抹防护产品后反射率发生了变化。
研究中使用的产品在近红外辐射范围内对人体皮肤的定向反射率有统计学上的显著影响，而对更高波长的影响较小。
结果表明，所选产品仅在涂抹几十分钟后才显示出对红外辐射的防护作用，这可能表明它们必须深入皮肤更深层才能发挥作用。半球定向反射率被证明是一种评估化妆品防护性能有效性的有效方法。
