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Glucomannan's effects on weight reduction have been evaluated in children. Research conducted in 60 children younger than 15 years (mean age, years; mean overweight, 46%) found that glucomannan given 1 g twice daily for 2 months to 30 children reduced mean weight from % to 41% ( P < ). Similarly, 30 children received placebo and the mean weight decreased from % to % ( P < ). However, there were no statistically significant differences between the treatment and placebo groups. 24 , 25 Another study found that when compared with a control group, glucomannan given at dosages of 2 to 3 g daily for 4 months reduced excess body weight, total cholesterol, and triglycerides in obese children. 25 , 26