ZUG, Switzerland & IRVINE, Calif.–(BUSINESS WIRE)–Galderma (SIX: GALD) today announced that it has signed an agreement to acquire ZO® Skin Health, a leading physician-dispensed skincare brand built on clinical science and protocol-based daily care, from its shareholders, including funds managed by Blackstone Tactical Opportunities (“Blackstone”) and the Obagi family. Founded by dermatologist Dr. Zein Obagi and headquartered in Irvine, California, ZO Skin Health has been a reference name in cl