With 3% Hyaluronic Acid & skin-softening B5, this Simple Booster Serum locks in moisture to make dry skin and sensitive skin instantly softer and more youthful-looking.Hyaluronic acid is our hydrating, power-plumping miracle for youthful-looking skin. Our new Booster Serums are powered by high-performance ingredients to supercharge your skin care routine for instant, visible results. This hydrating serum is a real multitasker; along with locking moisture into dry skin and improving skin texture, it also relieves irritation, making it the perfect partner to calm dry or sensitive skin. Packed with 3% active ingredients (95% of which are naturally derived), it contains 0.5% active hyaluronic acid, 0.5% active PENTAVITIN™ and 2.5% active provitamin B5 – the dream team for soft, plump skin. Our kind to skin promise? Like all Simple products, our Booster Serum is dermatologically tested, non-comedogenic, contains no harsh chemicals that can upset your skin and is free from alcohol, mineral oils, artificial colours and perfume.