We’ve lovingly formulated Boots vitamin C ADVANCED  dark spot correcting booster serum with high concentrated vitamin C and Advanced Dark Spot Correcting complex^. This supercharged booster serum helps reduce and prevent dark spots for visibly even-toned and brighter skin. Dark spots look noticeably reduced within 7 days*.  Paraben-free. We’ve tested this and it’s suitable for all skin types. Booster Serum delivers maximum results in 7 days after first application