Tapioca resistant maltodextrin: Production, characterization, health benefits, food applications, and future perspectives: A review

Background Resistant maltodextrin (RMD) is a soluble, low-viscosity dietary fiber produced by the pyroconversion of starch followed by enzymatic hydrolysis to remove the digestible fraction, and is conventionally classified as a type IV resistant starch. Cassava (Manihot esculenta Crantz) is an attractive feedstock because of its high starch content, low lipid and protein levels, and adaptation to tropical cultivation. Nevertheless, evidence for tapioca-derived resistant maltodextrin (TRM) is routinely pooled with evidence for resistant dextrins derived from maize, potato, and wheat, making it difficult to distinguish findings demonstrated specifically for TRM from those inferred from resistant dextrins more broadly. Scope and approach This review distinguishes between these two bodies of evidence. Structural claims are evaluated according to the analytical techniques used to support them, resistant-fraction values are reported together with the corresponding analytical assays, TRM is compared with resistant maltodextrins derived from other botanical sources under matched processing conditions, and health-related evidence is classified according to study model. In addition, a minimum characterization framework and a jurisdiction-specific comparison of regulatory status are proposed. Key findings and conclusions Under identical processing conditions, cassava-derived RMD exhibited the highest water solubility among the tuber starches tested (99.8%), but not the highest indigestible fraction, which was greater for potato-derived RMD (85.0% vs. 82.6%). The linkage rearrangement, increased branching, and loss of crystallinity reported for TRM are common features of dextrinized starches generally; therefore, the most defensible distinction of TRM lies in its technological origin rather than in a unique structural signature. Loss of crystallinity alone cannot account for digestive resistance, as highly processed TRM can also exhibit a highly porous structure. Reported molecular weights span approximately two orders of magnitude, reflecting differences in catalyst strength, the presence or absence of an enzymatic step, and chromatographic calibration methods. Pooled trials of resistant dextrin indicate modest reductions in fasting glucose and insulin resistance, but no significant effect on glycated hemoglobin. Moreover, human evidence directly evaluating the effects of TRM on gut microbiota composition and short-chain fatty acid production remains limited, with no identified study directly assessing these outcomes. Key priorities are method-transparent reporting, matched-condition comparisons across botanical sources, and controlled human feeding trials using well-characterized TRM.