Types segmentation categorizes oral adjuvants according to their material platform and mechanism of action. Polymeric nanoparticles, chiefly composed of PLGA or chitosan, represent the largest type, contributing roughly 45 % of total sales due to their scalability, controlled release properties, and established safety profile. Lipid‑based carriers, including solid lipid nanoparticles and liposomes, account for about 30 % of the market, offering enhanced mucosal uptake and the ability to co‑encapsulate antigens and immunostimulants. Bacterial toxin‑derived adjuvants, such as detoxified cholera toxin or heat‑labile enterotoxin fragments, hold a 15 % share, valued for their potent mucosal immune activation despite higher regulatory scrutiny. Plant‑derived adjuvants, exemplified by saponin‑based formulations, occupy the remaining 10 % and are gaining traction because of their natural origin and perceived safety. Each type influences market dynamics through distinct manufacturing costs, formulation complexity, and regulatory pathways, thereby shaping the overall market size and competitive landscape within the Oral Vaccine Adjuvants sector.