Medik8, the premium skincare brand favoured by Hailey Bieber and skincare expert Caroline Hirons, is currently offering 20% off site-wide. The brand's crystal retinal serum has garnered over 7,200 five-star reviews, with experts praising its fast-acting retinaldehyde formula that targets fine lines and boosts firmness within weeks.
The serum is available in multiple strengths to suit different experience levels. For beginners, the retinal 1 or 3 formulas are recommended, with skincare expert Helen Wilson-Beevers noting that the retinal 1 has a glossy feel and sinks in quickly. Beauty editor Lucy Partington endorsed the crystal retinal 10 as the best high-strength retinal, advising slow introduction for advanced users.
Regular users may opt for the crystal retinal 6, which can deliver springy, smooth skin free from dullness within three weeks. For experienced users, strengths 20 and 24 are available. The brand's science-backed approach focuses on specific concerns like hyperpigmentation, avoiding unnecessary fragrance and elaborate packaging found in ultra-luxe competitors.
Beyond retinals, Medik8's multi-award-winning liquid peptides are also on offer at 25% off, reducing the price from £79 to £63. This product is clinically proven to visibly reduce smile lines in 10 minutes and deep-set wrinkles in eight weeks, with mature skin writer Jane Cunningham reporting softer skin after use.
