Fig. 4From: The collagen enhancement by Spirulina extract in intrinsic and extrinsic skin aging in albino ratImpression level of ROS, SOD, GSH, TNF and IL-1 in different experimented groups.GI: control young group, GII: SE only group, GIII: UVA group, GIV: UVA + SE, GV: old untreated group and GVI: old + SE group. Values with similar letters mean a non-significant difference, and values with different letters mean a significant differenceBack to article page