Ideal for retinol beginners and long-term users alike, Neutrogena’s Retinol Boost Serum leaves skin with a youthful-looking bounce and glow. The lightweight, silky serum visibly improves tone and texture, while helping to reduce the appearance of multiple visible signs of ageing, including fine lines, dark spots, pigmentation, and a loss of firmness. Alongside pure retinol, the serum combines herbal extracts of myrtle to enhance the efficacy of the vitamin A derivative, while hyaluronic acid locks in moisture for long-lasting hydrating and plumping effects. Fine lines are visibly smoothed, dark spots are brightened and skin appears more radiant. INSTANTLY*: smooths the skin and improves texture (+29%**) IN 1 WEEK*: softens fine lines (-22%), skin appears clearer (+23%) and more radiant (+20%) IN 4 WEEKS*: pigmentation spots are reduced (-32%) and signs of sun damage are improved (+15%) IN 8 WEEKS*: evens skin tone (+35%), reduces the look of fine lines (-43%), skin is more glowing (+40%) *Clinical grading on 31 women over 8 weeks, once a day usage. **Average % improvement