From these articles the applied experimental methodologies (obtaining samples, environmental conditions and labor-atory equipment) and the mathematical models used to give physical, chemical and biological meaning to the results were analyzed and discussed, concluding in the methodologies that have best adapted to the advance of the technology for obtaining isothermal curves in the last years. This review considers the papers available since 2001 associated with water adsorption studies on seeds and other food products as well as the approach of different authors to to technical and experimental models and processes that are needed for the development of this topic. We want to present an approach to the state of knowledge about the methods to characterize seeds and materials associated with food products physically and struc-turally, and to relate this knowledge to biophysical processes in these materials. In addition, it is a measure to be considered when characterizing the physicochemical and structural properties of the materials. The determination of the isothermal adsorption curves represents a mechanism that allows ob-taining information on the process of adsorption of water in organic and inorganic materials. The integrals of the multiterm exponential and non-exponential models are presented to estimate or predict in vitro glycaemic indices. These multiterm models will add to models for describing multiphasic starch digestograms, ensuring such are properly modelled with objective predictability indices to assist researchers and for inter-laboratory comparisons. Ten typical samples are presented, and the models suitably (r² > 0.95 p 0.88 p < 0.05) described biphasic digestograms with practical digestion parameters, as exemplified by 10 presented digestograms. The first-order kinetic and the Peleg models were respectively expanded to yield three-term exponential and non-exponential models for triphasic starch digestograms.
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