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To homogenize the variance before analysis, percentage data were transformed as an angular transformation (Gomez and Gomez 1984)
Limited Research Due to safety concerns and a lack of scientific evidence supporting their effectiveness, the FDA has not approved glutathione injections for skin whitening
Andreeff M , Darzynkiewicz Z, Cirrincione C, Groshen S, Melamed MR
Ten microliters of each plant extract, standard and controls were put into 300 L of the FRAP reagent (in triplicate) and left in a dark place for 4 min
Huang C, Dong L, Zhao B, Lu Y, Huang S, Yuan Z
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