Types of gut health supplements diversify the product landscape beyond application categories. Probiotics remain the largest type, encompassing single‑strain and multi‑strain bacterial blends that address microbiome modulation; they capture the majority of R&D spend and command premium pricing. Prebiotics, primarily soluble fibers such as inulin and fructooligosaccharides, support endogenous bacterial growth and represent a growing segment due to their compatibility with both probiotic and synbiotic formulations. Synbiotics combine these mechanisms, offering synergistic efficacy and attracting a niche of clinically‑oriented consumers. Postbiotics—non‑viable microbial metabolites—are an emerging type, gaining traction for stability and safety advantages. Digestive enzymes and herbal extracts (e.g., ginger, peppermint) target digestive regularity and functional disorder relief, respectively, and occupy smaller but strategically important market slices. By delineating these types, analysts can map product pipelines, assess competitive intensity, and estimate each type’s contribution to the overall market size within the broader Gut Health Supplement segmentation framework.