-
1.
Evaluation of the relative available energy of several dietary fiber preparations using breath hydrogen evolution in healthy humans.
Oku, T, Nakamura, S
Journal of nutritional science and vitaminology. 2014;(4):246-54
Abstract
A standardized simple, indirect method for assessing the relative energy of dietary fiber carbohydrates is not yet established. There is a need for a standardized in vivo assay. The objective of the present study was to evaluate the relative available energy (RAE) for 9 major dietary fiber materials (DFMs) based on fermentability from breath hydrogen excretion (BHE) in subjects. Fructooligosaccharide (FOS) was used as a reference. The study was conducted using a within-subject, repeated measures design and approved by the Ethical Committee of University of Nagasaki. After DFM ingestion, end-expiratory gas (750-mL) was collected at 1-h intervals for 8 h, as well as at 2-h intervals between 8 h and 14 h, and 30 min after waking up and 24 h after DFM ingestion. Breath hydrogen concentration was assessed with a gas chromatograph. The RAE of DFMs tested was evaluated based on the area under the curve (AUC) of BHE of FOS. Based on the ratio of AUC for 8 h, the RAE of polydextrose, partially hydrolysed guar gum, resistant maltodextrin and partially hydrolysed alginate was 1 kcal/g, and that of glucomannan, heat-moisture treatment and high-amylose cornstarch and cellulose was 0 kcal/g, while the RAE of all tested DEMs including cellulose and glucomannan was 1 kcal/g in the calculation based on AUCs for 14 h and 24 h in subjects. We suggest that a breath hydrogen collection period of 14 h or more could be used to measure RAE for a range of fiber preparations in vivo.
-
2.
Impact of glycaemic index and dietary fibre on insulin sensitivity during the refeeding phase of a weight cycle in young healthy men.
Lagerpusch, M, Enderle, J, Later, W, Eggeling, B, Pape, D, Müller, MJ, Bosy-Westphal, A
The British journal of nutrition. 2013;(9):1606-16
Abstract
Previous studies suggest that a low-glycaemic index (LGI) diet may improve insulin sensitivity (IS). As IS has been shown to decrease during refeeding, we hypothesised that an LGI- v. high-GI (HGI) diet might have favourable effects during this phase. In a controlled nutritional intervention study, sixteen healthy men (aged 26·8 (SD 4·1) years, BMI 23·0 (SD 1·7) kg/m2) followed 1 week of overfeeding, 3 weeks of energy restriction and of 2 weeks refeeding at ^50% energy requirement (50% carbohydrates, 35% fat and 15% protein). During refeeding, subjects were divided into two matched groups receiving either high-fibre LGI or lower-fibre HGI foods (GI 40 v. 74, fibre intake 65 (SD 6) v. 27 (SD 4) g/d). Body weight was equally regained in both groups with refeeding (mean regain 70·5 (SD 28·0)% of loss). IS was improved by energy restriction and decreased with refeeding. The decreases in IS were greater in the HGI than in the LGIgroup (group £ time interactions for insulin, homeostasis model assessment of insulin resistance (HOMAIR), Matsuda IS index (MatsudaISI);all P,0·05). Mean interstitial glucose profiles during the day were also higher in the HGI group (DAUCHGI-LGI of continuous interstitial glucose monitoring: 6·6 mmol/l per 14 h, P¼0·04). At the end of refeeding, parameters of IS did not differ from baseline values in either diet group (adiponectin, insulin, HOMAIR, Matsuda ISI, M-value; all P.0·05). In conclusion, nutritional stress imposed by dietary restriction and refeeding reveals a GI/fibre effect in healthy non-obese subjects. LGI foods rich in fibre may improve glucose metabolism during the vulnerable refeeding phase of a weight cycle.
-
3.
Beverages containing soluble fiber, caffeine, and green tea catechins suppress hunger and lead to less energy consumption at the next meal.
Carter, BE, Drewnowski, A
Appetite. 2012;(3):755-61
Abstract
Previous research has shown that beverages containing soluble fibers can decrease energy intake at the next meal among normal weight participants. Caffeine and green tea catechins have separately been associated with increased satiety. The present study examined the satiating power of a beverage containing soluble fiber as well as a beverage containing the same fiber, caffeine and green tea catechins. These two test beverages were evaluated in comparison to an equal calorie control beverage as well as a no-beverage control condition. All beverage preloads were presented three times for a total of 0.28-0.35MJ and 0-30g fiber. Dependent measures were appetite ratings and calorie intake at a test meal. The no-beverage condition was associated with the highest ratings for hunger and the lowest ratings for fullness when compared to the other three beverage conditions. Of the three beverage conditions, the beverage containing the fiber, green tea catechins, and caffeine created the lowest hunger and the highest fullness ratings. That condition was also associated with the lowest energy intake at the next meal. The present findings indicate that the beverage containing caffeine and green tea catechins in combination with soluble fiber decrease appetite and energy intake relative to a beverage with equal caloric content.
-
4.
Impact of dietary fibre-enriched ready-to-eat extruded snacks on the postprandial glycaemic response of non-diabetic patients.
Brennan, MA, Derbyshire, EJ, Brennan, CS, Tiwari, BK
Molecular nutrition & food research. 2012;(5):834-7
Abstract
Food intervention is a financially sensible way for prevention and treatment of diabetes. Extruded snack foods are considered high glycaemic products. Our previous research illustrated that postprandial glycaemic responses to snacks are manipulated by altering dietary fibre and starch contents. The current research assessed the effect of psyllium and oat bran on postprandial glycaemia and in vitro digestibility. Addition of psyllium fibre to extruded snack products significantly reduced both the in vitro and in vivo glycaemic responses of products compared to a control snack product recipe. Oat bran inclusion reduced in vitro starch digestibility but not in vivo glycaemic response. The inclusion of oat bran into the snack products appeared to extend the glycaemic response of individuals compared to the control snack, suggesting a possibility of prolonging glucose release and potentially affecting satiety responses. The positive effect in attenuating glucose response means that psyllium fibre could be a target for inclusion by the snack food industry to effectively manipulate postprandial glucose response of individuals.
-
5.
A program consisting of a phytonutrient-rich medical food and an elimination diet ameliorated fibromyalgia symptoms and promoted toxic-element detoxification in a pilot trial.
Lamb, JJ, Konda, VR, Quig, DW, Desai, A, Minich, DM, Bouillon, L, Chang, JL, Hsi, A, Lerman, RH, Kornberg, J, et al
Alternative therapies in health and medicine. 2011;(2):36-44
Abstract
BACKGROUND An effective treatment for fibromyalgia (FM) has yet to become available. OBJECTIVE To assess the efficacy ofa lifestyle program consisting of a modified elimination diet and a supplemental medical food on clinical symptoms of FM assessed by the Fibromyalgia Impact Questionnaire (FIQ), FibroQuest Symptoms Survey (FibroQuest), Medical Symptoms Questionnaire (MSQ), metallothionein mRNA expression, and urinary toxic element excretion. METHODS Eight women (aged 48-74 years) were enrolled in an 8-week pilot trial employing a sequential design. During the initial 4-week Program A (control), participants consumed a modified US Department of Agriculture food pyramid diet and a rice protein powder supplement that provided basic macronutrient support. During the second 4-week Program B (intervention), participants consumed a modified elimination diet and a phytonutrient-rich medical food. RESULTS Compared to baseline, both programs showed trends toward lower mean FIQ total score, MSQ total score, and FibroQuest total score, FIQ stiffness score, and FibroQuest headaches score. Compared to Program A, Program B resulted in a significant decrease (P< .05) in the FIQpain score and stiffness score. Participants also had better pain tolerance at five tender points during Program B than during Program A. Higher metallothionein mRNA expression was observed during Program B. An increase in creatinine-adjusted mercury excretion and suggestive increase in creatinine-adjusted arsenic excretion were noted when Program B was compared to baseline. Urinary mercury/arsenic concentrations were inversely associated with FIQand FibroQuest scores. CONCLUSIONS Program B was shown to be a safe and efficacious botanically derived medical food treatment program for the amelioration of FM symptoms.
-
6.
Soluble fiber dextrin enhances the satiating power of beverages.
Monsivais, P, Carter, BE, Christiansen, M, Perrigue, MM, Drewnowski, A
Appetite. 2011;(1):9-14
Abstract
This study compared the effects of four types of fiber on satiety and energy intakes at the next meal using a standard double-blinded preload study design. Study participants (14 men and 22 women) each took part in 6 study sessions. Study preloads were a combination of a solid snack and a liquid beverage (energy range 0.78-0.83 MJ) containing four different types of fiber: soluble fiber dextrin (12 g), soluble corn fiber (11.8 g), polydextrose (11.8 g), and resistant starch (11.2g). All four fibers were compared to two control conditions of equal volume: an isoenergetic, low-fiber preload and a lower-energy, low-fiber preload. All preloads were presented twice for a total of 0.35-1.65 MJ and 1-24 g fiber. Satiety ratings were collected for 20 min intervals for 220 min during the morning testing session. A test meal was served at 1200 h and plate waste measured. The five higher-energy preloads led to higher fullness and lower hunger ratings compared to the low-energy control but were not significantly different from each other. Relative to the isoenergetic control, only soluble fiber dextrin significantly suppressed energy intakes (p=0.023). Supplementing beverages with soluble fiber dextrin affects short term energy intake and may have implications for weight control.
-
7.
The addition of fiber and the use of continuous infusion decrease the incidence of diarrhea in elderly tube-fed patients in medical wards of a general regional hospital: a controlled clinical trial.
Shimoni, Z, Averbuch, Y, Shir, E, Gottshalk, T, Kfir, D, Niven, M, Moshkowitz, M, Froom, P
Journal of clinical gastroenterology. 2007;(10):901-5
Abstract
GOALS To determine if feeds high in fiber continuously administered might minimize diarrhea. BACKGROUND The addition of soluble fiber to enteral feedings has not consistently decreased diarrhea in controlled clinical trials, and the effect of the use of intermittent or continuous infusions on the rate of diarrhea is similarly controversial. STUDY We studied 148 of 160 selected elderly well-nourished patients with acute disease prohibiting oral intake in a controlled clinical trial in the setting of an internal medicine departments in a regional hospital who were divided into 4 groups and fed according to combinations of intermittent or continuous systems, with fiber-free or fiber rich formulas. The 5-day rate of diarrhea was defined as 2 liquid stools or 3 or more semisolid or liquid bowel movements during a 24-hour period. Other outcome variables included mortality, hospital days, prolonged hospitalization (over 20 d), fever, and stools positive for Clostridium difficile cytotoxin A/B. RESULTS The increased relative risk of the continuous/fiber-free, intermittent/fiber, and intermittent/fiber-free groups compared with the continuous/fiber group was 2.8 [95% confidence interval (CI)=1.0-8.1], 2.5 (95% CI=0.9-7.1), and 5.0 (95% CI=1.9-13.2), respectively. These findings were independent of age (>80 y), female sex, being treated with antibiotics for respiratory or urinary infections, receiving respiratory support, or being fully conscious. There were no significant differences in the other outcomes. CONCLUSIONS We conclude that in elderly well-nourished hospitalized patients with acute diseases prohibiting oral intake, continuous and closed enteral feedings with the addition of fiber is effective in reducing the rate of diarrhea.
-
8.
Effectiveness of bran supplement in older orthopaedic patients with constipation.
Kaçmaz, Z, Kaşiçi, M
Journal of clinical nursing. 2007;(5):928-36
Abstract
AIM: The purpose of the study was to evaluate the effectiveness of planned nursing interventions, including bran supplement, on the bowel management of older orthopaedic patients. BACKGROUND Constipation is prevalent among older people. Constipation is also well-known to be a problem for a range of orthopaedic patients. Orthopaedic diseases or conditions may, because of the specific problems, cause this. The problem may also arise as a result of the orthopaedic treatment options undertaken by patients. DESIGN A quasiexperimental design was employed. METHODS The patients were recruited from an orthopaedic clinic at a university hospital in Erzurum, eastern Turkey. Descriptive statistics, independent sample test t-test, chi-square and McNemar test were used to analyse the data. Constipation problems were identified through interviews by using the Constipation Diagnosis Form. Interviews were performed within the fourth postoperative day. After that, while the patients in the control group received routine nursing care according to clinic routine, the patients in the experimental group received bran supplement together with planned nursing interventions. The patents in both groups were followed by using the Constipation Follow Form. RESULTS While patients in the experimental group showed significant improvements in most characteristics of bowel elimination such as time of defecation, intensity of faeces, colour of faeces and amount of faeces, the control group showed a significant improvement in only duration of defecation. CONCLUSIONS The results of the study indicate planned nursing interventions including bran supplement are more effective than routine nursing interventions for management of constipation problems in older orthopaedic patients. RELEVANCE TO CLINICAL PRACTICE Nurses have an important part to play in both prevention and management of constipation. Constipation is a problem especially for older orthopaedic patients. Planned nursing interventions that include bran supplements may be more effective than routine nursing interventions for management of constipation problems in older orthopaedic patients.
-
9.
Gastric emptying effects of dietary fiber during 8 hours at two simulated cabin altitudes.
Hinninghofen, H, Musial, F, Kowalski, A, Enck, P
Aviation, space, and environmental medicine. 2006;(2):121-3
Abstract
BACKGROUND In a questionnaire survey, long-distance flying staff of a charter airline reported significantly more dyspeptic symptoms than did short-haul crewmember and ground personnel (belching: 57% vs. 37%, bloating: 51% vs. 36%). To elucidate the reason for increased frequency of gastrointestinal symptoms during long-distance flights, we investigated the effects of altitude and diet on gastric emptying, cardiovascular function, and bodily complaints. METHODS In a 2 x 2 repeated measurement design we simulated an 8-h flight in a hypobaric chamber in 16 healthy men subjected to 2 meal conditions (high fiber vs. low fiber) on separate days, and assigned to either a flight altitude of 2500 m (8200 ft) or 1000 m (3280 ft). The subjects were blinded toward altitude. Heart rate and gastrointestinal symptoms were taken every hour, and gastric emptying was assessed by 13C-octanoic acid breath-test. In a separate experiment, we examined the effect of the two test meals (2 g vs. 20 g of fiber) in 30 healthy men under conventional laboratory conditions and found no significant differences. RESULTS At an altitude of 2500 m, heart rate was significantly increased independent of the dietary condition. Gastric emptying (T1/2) was significantly delayed at 2500 m (8200 ft) when a high-fiber meal was given (146.3 +/- 58.4 min low fiber vs. 193.9 +/- 54.3 min high fiber). The symptom score for gastric distension (mean: 1.33 +/- 0.3 vs. mean: 1.07 +/- 0.15) and bloating (mean: 1.82 +/- 0.47 vs. mean: 1.34 +/- 0.35) were also significantly increased at 2500 m for the high-fiber meal compared with the low-fiber meal. CONCLUSIONS Flight altitude is a physiological load. In combination with a high-fiber diet, this induces significant delays in gastric emptying that may explain symptoms of cabin and cockpit crew and passengers on long-distance flights.
-
10.
Oral administration of hydrolyzed rice bran prevents the common cold syndrome in the elderly based on its immunomodulatory action.
Maeda, H, Ichihashi, K, Fujii, T, Omura, K, Zhu, X, Anazawa, M, Tazawa, K
BioFactors (Oxford, England). 2004;(1-4):185-7
Abstract
The preventive effect of Hydrolyzed Rice Bran against the common cold syndrome was examined in elderly people. Arabinoxylan derivatives of Hydrolyzed Rice Bran (HRB) were prepared from water-soluble rice bran through partial processing using a carbohydrate complex. Using the water-soluble Rice Bran (RB) as a control, a cross over double-blind study was conducted on both substances over a 6-week administration period. Fifty elderly people aged from 70 to 95 years participated in the study and the comparative data from 36 participants were analyzed. There were no withdrawals from in the study due to the side effects of the experimental foods. Symptoms were observed and scored. The total symptom score for the RB treatment group was three times higher than that for the HRB treatment group. The average duration of symptoms was 2.6 days for RB whereas it was only 1.2 days for HRB. Furthermore, some immunomodulatory action was observed in laboratory tests. HRB was shown to be useful in reducing the physical stress associated with acute respiratory tract infection.