Metabolic stability of D-allulose in biorelevant media and hepatocytes: Comparison with fructose and erythritol

Han Joo Maeng, Jin Ha Yoon, Kwang Hoon Chun, Sung Tae Kim, Dong Jin Jang, Ji Eun Park, Yang Hee Kim, Seong Bo Kim, Yu Chul Kim

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6 Citations (Scopus)


D-allulose, a C-3 epimer of D-fructose, is a rare monosaccharide used as a food ingredient or a sweetener. In the present study, the in vitro metabolic stability of D-allulose was examined in biorelevant media, that is, simulated gastric fluid (SGF) and fasted state simulated intestinal fluid (FaSSIF) containing digestive enzymes, and in cryopreserved human and rat hepatocytes. The hepatocyte metabolic stabilities of D-allulose were also investigated and compared with those of fructose and erythritol (a sugar-alcohol with no calorific value). D-allulose was highly stable in SGF (97.8% remained after 60 min) and in FaSSIF (101.3% remained after 240 min), indicating it is neither pH-labile nor degraded in the gastrointestinal tract. D-allulose also exhibited high levels of stability in human and rat hepatocytes (94.5-96.8% remained after 240 min), whereas fructose was rapidly metabolized (43.1-52.6% remained), which suggested these two epimers are metabolized in completely different ways in the liver. The effects of D-allulose on glucose and fructose levels were negligible in hepatocytes. Erythritol was stable in human and rat hepatocytes (102.1-102.9% remained after 240 min). Intravenous pharmacokinetic studies in rats showed D-allulose was eliminated with a mean half-life of 72.2 min and a systemic clearance of 15.8 mL/min/kg. Taken together, our results indicate that D-allulose is not metabolized in the liver, and thus, unlikely to contribute to hepatic energy production.

Original languageEnglish
Article number448
Issue number10
Publication statusPublished - 2019 Jan 1

Bibliographical note

Funding Information:
Funding: This work was supported by the 2018 Inje University research grant.

Publisher Copyright:
© 2019 by the authors.

All Science Journal Classification (ASJC) codes

  • Food Science
  • Microbiology
  • Health(social science)
  • Health Professions (miscellaneous)
  • Plant Science


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