Private Doctor by ID Hospital, Define Minus Serum. Formulated To Minimize Lines and Create Definition. ID Sculpt Technology with Micro-Tingling Spicules.Inspired by ID Hospitals in office treatments. This silky, skin smoothing anti-aging serum is meant to target sagging skin,wrinkles, and areas that lack elasticity, including the neck and décolleté. The formula is infused with ID. Sculpt Technology.