Print Email Facebook Twitter Predicted serum folate concentrations based on in vitro studies and kinetic modeling are consistent with measured folate concentrations in humans Title Predicted serum folate concentrations based on in vitro studies and kinetic modeling are consistent with measured folate concentrations in humans Author Verwei, M. Freidig, A.P. Havenaar, R. Groten, J.P. TNO Kwaliteit van Leven Publication year 2006 Abstract The nutritional quality of new functional or fortified food products depends on the bioavailability of the nutrient(s) in the human body. Bioavailability is often determined in human intervention studies by measurements of plasma or serum profiles over a certain time period. These studies are time and cost consuming and often appear to lack an optimal study design, leading to follow-up intervention trials. Therefore, an alternative approach is needed that will optimize the development of new products. This study describes an approach to predict human serum concentrations after the consumption of (fortified) food products. The concept is based on the integration of in vitro results with kinetic modeling. As a case study, human serum folate concentrations were predicted after the consumption of folate-fortified milk products for 4 wk. Oral bioavailability was investigated using a step-wise approach in which luminal bioaccessibility and intestinal absorption were independently evaluated. Subsequently, these in vitro data were integrated in a kinetic mathematical (in silico) model to predict serum folate concentrations after the intake of a single dose and during long-term consumption. This approach was evaluated in comparison to a human intervention study in which folic acid-fortified milk products were tested for their effect on serum folate concentrations. A high predictive quality of this alternative in vitro/in silico approach was demonstrated. Finally, this methodology was applied to predict serum folate concentrations after intake of different fortified milk products for 4 wk, showing its benefits for the development of new nutritional products. © 2006 American Society for Nutrition. Subject BiologyBiomedical Researchendogenous compoundfolic acidarticleclinical trialcomputer modelcontrolled clinical trialcontrolled studyfolic acid blood levelfollow upfood industryhumanin vitro studykineticsmilknutritional statusDairy ProductsFolic AcidHumansIleumIntestinal AbsorptionJejunumKineticsModels, BiologicalReproducibility of Results To reference this document use: http://resolver.tudelft.nl/uuid:7925187e-c634-4569-9e63-1b8c50ad8193 TNO identifier 239631 ISSN 0022-3166 Source Journal of Nutrition, 136 (12), 3074-3078 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.