Mz Skin's Reviving Bio-Plancenta & Stem Cell Serum fortifies, enhances, and restores skin to create a refreshed and rested complexion. Formally called Rest & Revive Restorative Placenta & Stem Cell Night Serum, Reviving Bio-Placenta & Stem Cell Serum is newly reformulated with Bio-Mimetic Placenta and Plant Stem Cells for powerful skin rejuvenation. 1.7 oz. Made in UK.