*Offer valid from 3/23/23 at 12:00 AM EST to 4/1/23 at 11:59PM EST with any purchase of Face Serum. One free 10 ml Hyaluronic Serum per order. No promo code needed; automatically added at checkout. Cannot be combined with other promotions or applied to past orders or gift card purchase. Offer is subject to change, alteration, or termination by Immunocologie Skincare at its sole discretion at any time.