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 .
White Rice Consumption and CVD Risk Factors among Iranian Population
Association between white rice intake and risk factors of cardiovascular diseases remained uncertain . Most of the previous published studies have been done in western countries with different lifestyles , and scant data are available from the Middle East region , including Iran . This cross-sectional study was conducted in the structure of Isfahan Healthy Heart Program ( IHHP ) to assess the association between white rice consumption and risk factors of cardiovascular diseases . In the present study , 3,006 men were included from three counties of Isfahan , Najafabad , and Arak by multistage cluster r and om-sampling method .  Dietary intake was assessed with a 49-item food frequency question naire ( FFQ ) . Laboratory assessment was done in a st and ardized central laboratory . Outcome variables were fasting blood glucose , serum lipid levels , and anthropometric variables . Socioeconomic and demographic data , physical activity , and body mass index ( BMI ) were considered covariates and were adjusted in analysis . In this study , Student 's t-test , chi-square test , and logistic regression were used for statistical analyses . Means of BMI among those subjects who consumed white rice less than 7 times per week and people who consumed 7 - 14 times per week were almost similar—24.8±4.3 vs 24.5±4.7 kg/m2 . There was no significant association between white rice  consumption and risk factors of cardiovascular diseases , such as fasting blood sugar and serum lipid profiles . Although whole grain consumption has undeniable effect on preventing cardiovascular disease risk , white rice consumption was not associated with cardiovascular risks among Iranian men in the present study . Further prospect i ve studies with a semi-quantitative FFQ or dietary record question naire , representing type and portion-size of rice intake as well as cooking methods and other foods consumed with rice that affect glycaemic index ( GI ) of rice , are required to support our finding and to illustrate the probable mechanism
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 .