La Roche-Posay Hyalu B5 Serum Expiration date: 03/2028 Size: Full size 1 fl oz Brand new, unopened box This anti-aging ultra hydrating pure hyaluronic acid face and neck serum leaves skin feeling plump to the touch and helps repair skin by replenishing the natural moisture barrier. This serum combines concentrated pure hyaluronic acid, madecassoside and vitamin B5 for optimal effectiveness while also being suitable for sensitive skin.