U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Northeast Area Beltsville, Maryland (BHNRC) Beltsville Human Nutrition Research Center Food Components and Health Laboratory Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Baer, Daviditem
                                            STOTE, KIM - State University Of New York (SUNY)item
                                            Henderson, Theresaitem
                                            PAUL, DAVID - University Of Idahoitem
                                            OKUMA, KAZUHIRO - Matsutani Chemical Industry Company, Ltditem
                                            TAGAMI, HIROYUKI - Matsutani Chemical Industry Company, Ltditem
                                            KANAHORI, SUMIKO - Matsutani Chemical Industry Company, Ltditem
                                            GORDON, DENNIS - Matsutani Chemical Industry Company, Ltditem
                                            Rumpler, Williamitem
                                            UKHANOVA, MARIA - University Of Floridaitem
                                            CULPEPPER, TYLER - University Of Floridaitem
                                            WANG, XIAOYU - University Of Floridaitem
                                            MAI, VOLKER - University Of Florida
  Submitted to: Journal of Nutrition
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 3/17/2014
                                    Publication  Date: 4/17/2014
                                    Citation: Baer, D.J., Stote, K.S., Henderson, T.R., Paul, D.R., Okuma, K., Tagami, H., Kanahori, S., Gordon, D.T., Rumpler, W.V., Ukhanova, M., Culpepper, T., Wang, X., Mai, V. 2014. The metabolizable energy of dietary resistant maltodextrin is variable and alters fecal microbiota composition in adult men. Journal of Nutrition. 114:1023-1029.Interpretive Summary: Resistant maltodextrin (RM) is a soluble, nonviscous fiber that is resistant to digestion but fermentable by microorganisms in the large intestine.  In order to properly label foods and understand the impact of RM on the energy value of foods that contain this fiber, it is necessary to determine its metabolizable (ME) and net (NE) energy values.  These values were determined in fourteen healthy male subjects by combining data from nutrient balance and calorimetry studies.  In addition, data on the effects of consuming resistant maltodextrin on bowel habits and protein, fat, and carbohydrate digestion were evaluated.  A randomized controlled, double blind, crossover study was conducted.  Each subject was assigned to a treatment sequence that consisted of three amounts of resistant maltodextrin as part of a controlled diet: 0 g/d resistant maltodexrtin + 50 g/d maltodextrin, 25 g/d resistant maltodextrin + 25 g/d maltodextrin, and 50 g/d resistant maltodextrin + 0 g/d maltodextrin.  Subjects consumed their treatment divided into two daily doses, one consumed with breakfast and the other with dinner.  After an appropriate adaptation period, urine and feces were collected during a 7-d period.  Following the collection period, energy expenditure of each subject was measured in a room-sized calorimeter.  Amounts of dry mass, energy, nitrogen, resistant maltodextrin, and total carbohydrate in the feces each increased with the increasing dose of resistant maltodextrin.  Fat excretion did not differ among treatments.  The measured metabolizable energy value of this fiber was 8.2 kJ (2 kcal)/g and 10.4 kJ (2.5 kcal)/g, and the net energy value of RM was -8.2 kJ (-2.0 kcal)/g and 2.0 kJ (0.5 kcal)/g, for the 25 g/d and 50 g/d doses, respectively.  These results are important for the food manufacturing industry, especially companies interested in increasing fiber content of foods, regulatory agencies involved with food labeling, and health professionals and policy makers who provide recommendations concerning fiber consumption.
                                Technical Abstract: Resistant maltodextrin (RM) is a novel soluble, nonviscous dietary fiber. Its metabolizable energy (ME) and net energy (NE) values derived from nutrient balance studies are unknown, as is the effect of RM on fecal microbiota. A randomized, placebo-controlled, double-blind crossover study was conducted (n = 14 men) to determine the ME and NE of RM and its influence on fecal excretion of macronutrients and microbiota. Participants were assigned to a sequence consisting of 3 treatment periods [24 d each: 0 g/d RM + 50 g/d maltodextrin and 2 amounts of dietary RM (25 g/d RM + 25 g of maltodextrin/d and 50 g/d RM + 0 g/d maltodextrin)] and were provided all the foods they were to consume to maintain their body weight. After an adaptation period, excreta were collected during a 7-d period. After the collection period, 24-h energy expenditure was measured. Fluorescence in situ hybridization, quantitative polymerase chain reaction, and 454 titanium technology–based 16S rRNA sequencing were used to analyze fecal microbiota composition. Fecal amounts of energy (544, 662, 737 kJ/d), nitrogen (1.5, 1.8, 2.1 g/d), RM (0.3, 0.6, 1.2 g/d), and total carbohydrate (11.1, 14.2, 16.2 g/d) increased with increasing dose (0, 25, 50 g) of RM (P < 0.0001). Fat excretion did not differ among treatments. The ME value of RM was 8.2 and 10.4 kJ/g, and the NE value of RM was -8.2 and 2.0 kJ/g for the 25 and 50 g/d RM doses, respectively. Both doses of RM increased fecal wet weight (118, 148, 161 g/d; P < 0.0001) and fecal dry weight (26.5, 32.0, 35.8 g/d; P < 0.0001) compared with the maltodextrin placebo. Total counts of fecal bacteria increased by 12% for the 25 g/d RM dose (P = 0.17) and 18% for the 50 g/d RM dose (P = 0.019). RM intake was associated with statistically significant increases (P < 0.001) in various operational taxonomic units matching closest to ruminococcus, eubacterium, lachnospiraceae, bacteroides, holdemania, and faecalibacterium, implicating RM in their growth in the gut. Our findings provide empirical data important for food labeling regulations related to the energy value of RM and suggest that RM increases fecal bulk by enhancing the excretion of nitrogen and carbohydrate and the growth of specific microbial populations.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov