China
Africa
Explore chapters and articles related to this topic
Photoprotection in Oncology Patients
Published in Paloma Tejero, Hernán Pinto, Aesthetic Treatments for the Oncology Patient, 2020
After avoiding sun exposure, the second line of photoprotection is to cover the body (clothes) and the head (hat and sunglasses); however, not all fabrics provide the same protection against the sun. To determine the degrees of efficacy of different sun protection fabrics with accuracy, the ultraviolet protection factor (UPF) is used, which measures blocked UVA and UVB radiation. The higher the UPF, the better the protection against UV radiation. In patients with photosensitivity, it is recommended that they wear clothes with UPF over 40.
Innovations and Future Prospects of Dermal Delivery Systems
Published in Tapash K. Ghosh, Dermal Drug Delivery, 2020
Rashmi Upasani, Anushree Herwadkar, Neha Singh, Ajay K. Banga
Sunscreen actives that provide broad spectrum photoprotection in the UV-A wavelengths are very effective antiaging ingredients, as UV-A radiation is the prime driver of premature aging. These ingredients include benzophenone, benzophenone complexes, avobenzene and ecamsule. Ecamsule is a newer ingredient that is expected to find its way into antiaging cosmeceuticals to provide long lasting UV-A protection (Amer et al. 2009).
Exploring the Potential of Using Micro- and Macroalgae in Cosmetics
Published in Gokare A. Ravishankar, Ranga Rao Ambati, Handbook of Algal Technologies and Phytochemicals, 2019
W.A.J.P. Wijesinghe, N.E. Wedamulla
The most powerful environmental risk factor in skin-cancer pathogenesis is sunlight UV radiation. Thus, photoprotective products with UV filters are highly recommended for the prevention of several types of damage such as sunburn, photo-aging, photo-dermatoses or even skin cancer. Formulations containing sunscreen agents combined with antioxidants can increase the effectiveness and safety of the product in question (Ariede et al., 2017).
Areca nut procyanidins prevent ultraviolet light B-induced photoaging via suppression of cyclooxygenase-2 and matrix metalloproteinases in mouse skin
Published in Drug and Chemical Toxicology, 2022
Chia-Ling Weng, Chih-Chiang Chen, Han-Hsing Tsou, Tsung-Yun Liu, Hsiang-Tsui Wang
Photoaging caused by solar UV light is the leading cause of extrinsic aging of the skin (Fisher et al.2002), characterized by epidermal thickness, increased collagen fragmentation, increased levels of matrix-degrading metalloproteinases, and inflammation (Thilagar et al.2009). A wide variety of polyphenols or phytochemicals have been reported to possess substantial photoprotective effects on the skin (Nichols and Katiyar 2010). This study clearly demonstrates that ANP protects skin from UVB irradiation-induced epidermal thickness and collagen disorder in vivo. Compared with EGCG, a well-studied polyphenolic constituent of green tea, we found that ANP had a similar effect on reduction of COX-2 and MMP expression. These results suggest that ANP had a comparable anti-inflammatory and photoprotective effect to that of EGCG.
Plants growing in Colombia as sources of active ingredients for sunscreens
Published in International Journal of Radiation Biology, 2021
Jorge Luis Fuentes, Diego Armando Villamizar Mantilla, Silvia Juliana Flores González, Luis Alberto Núñez, Elena E. Stashenko
The SPFin vitro and %GI estimates were correlated; but the %GI resulted in more sensitive to detect photoprotection against UVB at least to low plant extract concentrations (Figure 2, below). This was because some extracts showed a significant antigenotoxic effect at low concentrations. This also suggested that DNA damage estimates could be more effective to detect protective capabilities against UVB than index based on UV-spectral absorption, erythemal effect spectrum, and global solar intensity spectrum data. This result supported previous work (Young et al. 1998; Césarini and Demanneville 2000; Ikehata et al. 2013a), which showed that UV genotoxicity occurred at UV doses lower than MED and indicated the need that erythema-based UV radiation risk assessment should be reviewed. In this regard, different indices have been proposed to improve the actual system that measures sunscreen photoprotection efficacy as follows: (i) indices based on p53 gene mutation rates (Kamb 1994), (ii) indices based on genotoxicity protection (Césarini and Demanneville 2000), and (iii) indices based on the protection of the immune system (Fourtanier et al. 2005), among others.
Dermocosmetics: beneficial adjuncts in the treatment of acne vulgaris
Published in Journal of Dermatological Treatment, 2021
Elena Araviiskaia, Jose Luis Lopez Estebaranz, Carlo Pincelli
Exposome factors can impact the severity and duration of acne, as the skin is a major interface between the external environment and the body (8). Exposome is the term used to describe the collective environmental factors that an individual is exposed to in their lifetime (9). For instance, aggressive skin care regimens and inappropriate cosmetics (e.g. too greasy or oily, soaps with an alkaline pH) (10) can cause acne flares by changing the skin barrier and microbiota, thus triggering inflammation (8). Additionally, ultraviolet (UV) rays have been found to thicken the stratum corneum and increase sebum production and comedone formation, leading to changes in the skin microbiota and exacerbation of acne (8,11,12). As such, exposure to detrimental environmental factors should be limited; skincare products should be carefully selected to improve skin barrier function and limit irritation, and daily photoprotection is important to minimize UV exposure (8).