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The in vitro effect of zeaxanthin-rich Goji extracts 1 and 2 on the cells survival, and proliferation; (a) sigmoidal dose-response relationship between the concentration of 1 and 2 and the inhibition of the cells growth during 24 h of exposure; (b1,b2) linear dose-response relationship between the compounds concentration and metabolic activity-related Alamar Blue fluorescence (FI on y axis is the fluorescence intensity).
