Biossance Squalane + 10% Vitamin C Dark Spot Serum The Biossance Squalane + 10% Vitamin C Dark Spot Serum ($62) utilises white shiitake mushrooms, as well as vitamin C, to help fade the appearance of dark spots and get rid of dullness. Image Source: sephora.com Biossance Squalane + 10% Vitamin C Dark Spot Serum $62 from sephora.com Buy Now