TITLE

Plasma deuterium oxide accumulation following ingestion of different carbohydrate beverages

AUTHOR(S)
Currell, Kevin; Urch, Joanna; Cerri, Erika; Jentjens, Roy L. P.; Blannin, Andy K.; Jeukendrup, Asker E.
PUB. DATE
December 2008
SOURCE
Applied Physiology, Nutrition & Metabolism;Dec2008, Vol. 33 Issue 6, p1067
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Optimal fluid delivery from carbohydrate solutions such as oral rehydration solutions or sports drinks is essential. The aim of the study was to investigate whether a beverage containing glucose and fructose would result in greater fluid delivery than a beverage containing glucose alone. Six male subjects were recruited (average age (±SD): 22 ± 2 y). Subjects entered the laboratory between 0700h and 0900h after an overnight fast. A 600 mL bolus of 1 of the 3 experimental beverages was then given. The experimental beverages were water (W), 75 g glucose (G), or 50 g glucose and 25 g fructose (GF); each beverage also contained 3.00 g of D2O. Following administration of the experimental beverage subjects remained in a seated position for 180 min. Blood and saliva samples were then taken every 5 min in the first hour and every 15 min thereafter. Plasma and saliva samples were analyzed for deuterium enrichment by isotope ratio mass spectrometry. Deuterium oxide enrichments were compared using a 2-way repeated measures analysis of variance. The water trial (33 ± 3 min) showed a significantly shorter time to peak than either G (82 ± 40 min) or GF (59 ± 25 min), but the difference between G and GF did not reach statistical significance. There was a significantly greater AUC for GF (55 673 ± 10 020 δ‰ vs. Vienna Standard Mean Ocean Water (VSMOW).180min) and W (60 497 ± 9864 δ‰ vs. VSMOW.180min) compared with G (46 290 ± 9622 δ‰ vs. VSMOW.180min); W and GF were not significantly different from each other. These data suggest that a 12.5% carbohydrate beverage containing glucose and fructose results in more rapid fluid delivery in the first 75 min than a beverage containing glucose alone.
ACCESSION #
35731949

 

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