Serum is a crucial step in anyone's path to great skin - so if you feel like your pre-bed routine could do with some amping up, invest in a good serum. There's a great variety of products out there from age-defying to glow-enhancing and moisture-boosting formulas - it's certain you'll find the best suited product for your complexion.
But if you're looking for any tips on which one to get we've got great news for you - there's a bottle of serum out there that sells every minute around the world.
The Kiehl's Powerful-Strength Line-Reducing Concentrate has sold over 5 million bottles to date, and it's also a favourite around the GLAMOUR office. This cult product is known to restore complexion's moisture, reduce fine lines and give skin a youthful glow.
The serum's formula has recently been redesigned to include more Vitamin C and Hyaluronic Acid, and it took the brand 89 formula try-outs to achieve the perfect one:
"Our renovated formula ... provides faster, better results," says Dr. Geoff Genesky, Scientific Director at Kiehl's. "While Vitamin C is difficult to stabilize within a formula, the team worked meticulously to stabilize even more Vitamin C and deliver our most efficacious Powerful-Strength Line-Reducing Concentrate formula to date."
The new formula of the Kielh's best-seller is already available on the brand's website, and costs £62 a bottle.
27 best facial serums to apply in your 20s, 30s and 40s that actually workGallery27 PhotosncG1vNJzZmivp6x7qLjApqauqp2WtKLGyKecZ5ufY8Kse8Crq6KbnJp8rLXEoaOsZaCkxKa%2Bxa6jZqukp7Kvs9OhZKWhnpp6s7HDrpqippdisLC6wp6lraqRqbJuvsSvoJ6v