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  • Title: Developmental toxicity of isomalt in rats.
    Author: Waalkens-Berendsen DH, Koëter HB, Schlüter G, Renhof M.
    Journal: Food Chem Toxicol; 1989 Oct; 27(10):631-7. PubMed ID: 2606400.
    Abstract:
    The sugar replacer isomalt, a 1:1 mixture of the disaccharides glucopyranosylsorbitol and glucopyranosylmannitol, was incorporated in the diet of rats. Female Bay FB:30 rats were adapted to isomalt by feeding them a diet containing a gradually increasing amount of isomalt for several days, prior to mating. Subsequently, they were mated. Isomalt was fed continuously in concentrations of 2.5, 5 and 10% up to day 20 of pregnancy. In addition, one group of female Wistar rats was mated and fed 10% isomalt incorporated in the diet from day 0 up to day 20 of pregnancy, without previous adaptation to isomalt. Finally, one group of untreated female Wistar rats served as controls. Half of the number of females in each group was selected for caesarian section on day 20 of pregnancy. The other half was allowed to litter and rear their pups for 2 weeks (Wistar rats) or 3 weeks (Bay FB:30 rats). In the females of the Bay FB:30 rats, a decreased body-weight gain and food consumption were observed in the 5 and 10% isomalt group. Minor retardation in the development of the foetuses was observed in the 10% isomalt group only with the Bay FB:30 rats and was therefore considered to be related to maternal toxicity. In addition, a dose-related increase in the incidence of wavy ribs occurred in foetuses of the Bay FB:30 rats. However, none of the observed effects were persistent in neonates. Isomalt appeared to have slight toxic effects in the dams of the Bay FB:30 strain but no toxicity in the offspring. In Wistar rats no toxicity and no effects on maternal performance or on embryonic, foetal or neonatal development were seen. Isomalt, when fed at dietary levels up to 10%, did not induce structural or functional teratogenic effects in rats of either the Wistar or the Bay FB:30 strain.
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