Glutathione Face Serum Skin Whitening Brightening Moisturize Dark Spot Remover eBay Manyo Glutathione 7 Dark Spot Serum Ive been testing this brightening serum for dark spots and post acne marks. The texture is lightweight, absorbs quickly, and layers well in my routine. I like Glutathione Reductase Assay Kit Ive been using this combo to target dark spots and uneven skin tone., I start with the Abib Glutathiosome Dark Spot Serum, made with Glutathiosome (Glutathione + Exosome), to help brighten the skin