Premium
Effects of sunscreen on human skin’s ultraviolet radiation tolerance
Author(s) -
Chao Yuan,
Xuemin Wang,
Yimei Tan,
Lijie Yang,
Yinfen Lin,
Peilan Wu
Publication year - 2010
Publication title -
journal of cosmetic dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.626
H-Index - 44
eISSN - 1473-2165
pISSN - 1473-2130
DOI - 10.1111/j.1473-2165.2010.00525.x
Subject(s) - erythema , ultraviolet radiation , dermatology , ultraviolet , skin type , medicine , sun protection , sun protection factor , sun exposure , materials science , chemistry , optoelectronics , radiochemistry
Summary Purpose To observe the alteration ultraviolet radiation (UVR) of skin’s tolerance after its exposure to the small dose of UVR under the protection of sunscreen. Methods Eleven subjects who applied sunscreen were exposed to 0.75 dose minimal persistent pigment darkening (MPPD) and minimal erythema dose (MED) by the Phototherapy Unit for 4 weeks. Each week their MPPDs and MEDs were measured by solar simulator. Meanwhile, SPECTCOLOMETER ® and VISIOSCAN VC98 ® were used to detect the test areas and control areas. Results The values of MPPD and MED increased significantly after the exposure to UVR. But there were no visible changes on the surface of skin’s texture. Conclusion With the protection of sunscreen, the UVR tolerance of skin was greatly increased after the skin’s exposure to the small dose UV.