Biossance Squalane + 10% Vitamin C Dark Spot Serum 1.01 oz New never used with box This powerful and lightweight vitamin C dark spot serum features a proprietary white shiitake mushroom extract blended with our unique derivative of vitamin C, and delivers quicker, more powerful, longer-lasting results. Not only does it start degrading dark spots immediately, it keeps working every day to prevent new ones from forming. Delivers a boost of brightness with 10% vitamin C serum for dark spots, while white shiitake mushroom fades dark spots Shows visible brightening instantly, while it works over time to dissolve pigmentation and prevent new discoloration Our unique blend of ingredients is precisely calibrated to not cause irritation like traditional vitamin C serums for dark spots.