HYALURONIC ACID

‘This is a potent humectant that improves hydration, helping with fine lines,’ says Dr Jack. ‘It’s also an antioxidant suitable for use around the eyes.’ MZ Skin Depuff & Define (£90 for 15ml) contains high levels of hyaluronic acid (HA), along with peptides and caffeine, while Estée Lauder Advanced Night Repair Eye Concentrate Matrix (£49 for 15ml) contains two types of HA, giving a shot of moisture that plumps and smooths.