Danielle Anderson

U.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts, United States

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Publications (4)3.6 Total impact

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    ABSTRACT: Probiotics may enhance gastrointestinal health and immune function. The efficacy of different probiotic dosing strategies on colonization and persistence of probiotics is undefined. The authors assessed colonization and persistence of Lactobacillus reuteri (L. reuteri) DSM17938 (BioGaia AB, Stockholm, Sweden) after daily or alternate-day dosing. Volunteers ate pudding with L. reuteri (10(9) CFU) daily (n = 9) or on alternate days (n = 9) over 7 days. Fecal samples were collected on dosing days (D1-7) and after dosing ended (D13-15 and D20-22) and were analyzed for the presence of L. reuteri. Results are reported in 3-day increments (D2-4, D5-7, D13-15, and D20-22). L. reuteri count rose in response to daily supplementation ([mean ± SD] D2-4: 4 × 10⁴ ± 2 × 10⁴ CFU, p < 0.01; D5-7: 10 × 10⁴ ± 9 × 10⁴ CFU, p < 0.01) and alternate-day supplementation (D2-4: 21 × 10⁴ ± 20 × 10⁴ CFU, p < 0.01; D5-7: 11 × 10⁴ ± 15 × 10⁴ CFU, p = 0.06) and fell in both groups 1 week after dosing ended (p < 0.01). Total volunteers with detectable L. reuteri 1 and 2 weeks after dosing ended was similar in response to daily feeding (4/9 and 2/9, respectively) and alternate-day feeding (3/9 and 2/9, respectively). L. reuteri count was higher D2-4 in response to alternate-day vs daily feeding (p < 0.05) but similar thereafter. Alternate-day probiotic intake achieves equivalent colonization to daily intake, but colonization declines rapidly once dosing stops. It is possible that, initially, responsiveness to probiotics may differ between individuals, but those differences do not persist with longer consumption.
    Journal of the American College of Nutrition 08/2011; 30(4):259-64. · 1.74 Impact Factor
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    ABSTRACT: To examine how different proteins in a carbohydrate-protein beverage affect postprandial amino acid (AA), glucose, and insulin responses. Two randomized, repeated-measures experiments were performed. In one, 10 volunteers drank 3 carbohydrate-protein beverages (380 kcal, 76 g carbohydrate, 19 g protein, 2 g fat) in separate (>7 days) trials, each differing in protein type. All drinks consisted of cocoa (4 g) and nonfat dry milk (1 g) supplemented with casein (CAS), whey (WP), or a casein and whey blend (CAS-WP). Ten additional volunteers consumed the same drinks after 60 min of varying-intensity exercise (60% and 85% VO2peak). Blood glucose, insulin, glucose-dependent insulinotrophic polypeptide (GIP), and AAs were measured every 15-30 min for 4 hr after beverage consumption. Branched-chain AA concentrations peaked at 30 min and did not differ between beverages at rest (0.69 +/- 0.12 mmol/L) or postexercise (0.70 +/- 0.07 mmol/L). There were no significant differences between beverages with respect to initial (time 0-60) or total area under the curve (time 0-240) for any outcome measures at rest or postexercise. High-carbohydrate beverages containing various proportions of milk proteins procured from a supplier to the commercial industry had no impact on AA concentration. Retrospective chemical analysis of commercial proteins showed that casein was partially hydrolyzed; therefore, consumers should carefully consider the manufacturer (to ensure that the product contains intact protein) or other factors (i.e., cost or taste) when procuring these beverages for their purported physiological effects.
    International journal of sport nutrition and exercise metabolism 02/2009; 19(1):1-17. · 1.86 Impact Factor
  • Medicine and Science in Sports and Exercise - MED SCI SPORT EXERCISE. 01/2008; 40.
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    ABSTRACT: The objective of this study was to determine if the combination of volatile oil of mustard (VOM) vanillin is an effective food preservation system for molds and yeast. Four bread spoilage organisms were evaluated in the study Penicillium notatum, Rhizopus stolonifer, Aspergillus niger, and Saccharomycopsis fibuligera. The VOM/vanillin preservation system was evaluated in an impermeable packaging material developed by the military. Challenge studies were done in both potato dextrose agar (PDA) and military bread. The effectiveness of the preservation system was determined by growth/no growth criteria. The concentration of vanillin or VOM needed to inhibit each spoilage organism varied. Aspergillus niger was the most resistant organism to vanillin, >2000 ppm was needed for inhibition. In contrast, Rhizopus stolonifer was resistant to VOM. However, when the combination of VOM/vanillin was used together there was an additive effect or possibly a synergistic effect on both organisms. It was determined that 1500 ppm of vanillin in bread and 155 ug/L of VOM in the headspace of the packaging inhibited the outgrowth of both organisms for greater than three months. These results suggest that the preservation system of VOM/vanillin can effectively replace the oxygen scavenger.
    09/2006;

Publication Stats

7 Citations
3.60 Total Impact Points

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Institutions

  • 2009–2011
    • U.S. Army Research Institute of Environmental Medicine
      Natick, Massachusetts, United States