RESULTS The present study indicated that the efficacy of various fiber supplements on losing weight is variable .
Several mechanisms related to physicochemical properties of fibers such as solubility , fermentability and viscosity rates can be involved in their anti-obesity effects .
Dextrin , Mannan ( gum Arabic ) and pectin-rich fiber ( lupin kernel ) with no dietary interventions indicated a reduction in body weight and energy intake , while from clinical point of view , their effects were not considerable .
Overall , findings indicated that the efficacy of fiber supplements on obesity management is dependent on their contents and physicochemical properties .
It seems that fiber supplements with no weight-loss interventions did not have considerable antiobesity effects .
BACKGROUND Previous trials have reported beneficial effects of isolated and complex fiber supplements in obesity treatment .
However , recommending fiber supplements in obese subjects remains controversial .
To the best of our knowledge , no systematic review has up date d the data on the effects of fiber supplements on obesity since 2010 and the need exists for a systematic review on this topic .
Accordingly , a systematic review was undertaken to summarize the efficacy of different types of fiber supplements as a complementary treatment for weight management .
Acute effect of alginate-based preload on satiety feelings, energy intake, and gastric emptying rate in healthy subjects.
Viscous dietary fibers such as sodium alginate extracted from brown seaweed have received much attention lately for their potential role in energy regulation through the inhibition of energy intake and increase of satiety feelings . The aim of our study was to investigate the effect on postpr and ial satiety feelings , energy intake , and gastric emptying rate ( GER ) , by the paracetamol method , of two different volumes of an alginate-based preload in normal-weight subjects . In a four-way placebo-controlled , double-blind , crossover trial , 20 subjects ( age : 25.9 ± 3.4 years ; BMI : 23.5 ± 1.7 kg/m(2 ) ) were r and omly assigned to receive a 3 % preload concentration of either low volume ( LV ; 9.9 g alginate in 330 ml ) or high volume ( HV ; 15.0 g alginate in 500 ml ) alginate-based beverage , or an iso-volume placebo beverage . The preloads were ingested 30 min before a fixed breakfast and again before an ad libitum lunch . Consumption of LV-alginate preload induced a significantly lower ( 8.0 % ) energy intake than the placebo beverage ( P = 0.040 ) at the following lunch meal , without differences in satiety feelings or paracetamol concentrations . The HV alginate significantly increased satiety feelings ( P = 0.038 ) , reduced hunger ( P = 0.042 ) and the feeling of prospect i ve food consumption ( P = 0.027 ) , and reduced area under the curve ( iAUC ) paracetamol concentrations compared to the placebo ( P = 0.05 ) . However , only a 5.5 % reduction in energy intake was observed for HV alginate ( P = 0.20 ) . Although they are somewhat contradictory , our results suggest that alginate consumption does affect satiety feelings and energy intake . However , further investigation on the volume of alginate administered is needed before inferring that this fiber has a possible role in short-term energy regulation
RESULTS The present study indicated that the efficacy of various fiber supplements on losing weight is variable .
Several mechanisms related to physicochemical properties of fibers such as solubility , fermentability and viscosity rates can be involved in their anti-obesity effects .
Dextrin , Mannan ( gum Arabic ) and pectin-rich fiber ( lupin kernel ) with no dietary interventions indicated a reduction in body weight and energy intake , while from clinical point of view , their effects were not considerable .
Overall , findings indicated that the efficacy of fiber supplements on obesity management is dependent on their contents and physicochemical properties .
It seems that fiber supplements with no weight-loss interventions did not have considerable antiobesity effects .
BACKGROUND Previous trials have reported beneficial effects of isolated and complex fiber supplements in obesity treatment .
However , recommending fiber supplements in obese subjects remains controversial .
To the best of our knowledge , no systematic review has up date d the data on the effects of fiber supplements on obesity since 2010 and the need exists for a systematic review on this topic .
Accordingly , a systematic review was undertaken to summarize the efficacy of different types of fiber supplements as a complementary treatment for weight management .