A new approach to the evaluation of broad-spectrum sunscreens against ultraviolet and visible light-induced delayed tanning.
Protection against UV and visible light-induced delayed tanning (DT) and immediate tanning (IT) of two broad-spectrum sunscreens with the same sun protection factor was investigated. Protection factors (PFs) against DT (24 h and 7 days) of the sunscreens differed significantly, but PFs against IT did not. This study indicates that using PF against 24 h DT is more appropriate for an evaluation of broad-spectrum sunscreens against UVA and visible light than IT.
Department of Dermatology, National Defense Medical College, Saitama, Japan.
A
A
Kawada
K
K
Morimoto
M
M
Hiruma
T
T
Noda
A
A
Ishibashi
D000328:Adult; D006801:Humans; D008027:Light; D008297:Male; D012867:Skin / Q000528:radiation effects*; D013471:Sunburn / Q000517:prevention & control; D013473:Sunscreening Agents; D014466:Ultraviolet Rays
D013473:Sunscreening Agents