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Concentration of free radicals that formed in the SC of the human inner forearm skin after irradiation with a sunlight simulator in the 420–2000 nm spectral range for the verum group under supplementation with Lutex skinTM for 8-weeks (n = 10, orange color) and the placebo group (n = 12, grey color), measured in vivo by EPR spectroscopy. The figure is adapted from [191].
