Pharmaceutical Gelatin Market Size, Share & Industry Analysis, By Source (Bovine, Porcine, Marine, and Others), By Function (Film-forming & Coating Agent, Gelling & Thickening Agent, Stabilizing Agent, and Others), By Application (Hard Capsules, Soft Capsules, Tablets, and Others), By Type (Type A and Type B), By End User (Pharmaceutical Companies, Capsule Manufacturers, CMOs & CDMOs, and Others), and Regional Forecast, 2026-2034