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Effects of Konjac Glucomannan Noodle Intervention in Subjects With Metabolic Syndrome

Office of Human Research, Taipei Medical University

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02711306
Enrollment
36
Registered
2016-03-17
Start date
2013-05-31
Completion date
2014-03-31
Last updated
2019-10-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Metabolic Syndrome

Brief summary

Metabolic syndrome (MS) is a complex disease with a cluster of risk factors and clinical features, which includes central or abdominal obesity, atherogenic dyslipidemia, impaired glucose regulation, hyperinsulinemia, high blood pressure, and concomitance of pro-inflammatory cytokine and insulin resistance. Glucomannan (GM) is a water-soluble dietary fiber derived from the root of Amorphophallus konjac that can improve blood sugar, blood fat concentration, and weight management, and has other health benefits.The purposes of this study are going to investigate the effects of KGM noodle (KGN) as stable food to MS and diabetic patients.

Detailed description

The KGN diet was composed of well-cooked noodle with 2 g of KGM in a dosage of 200 g/piece twice daily to substitute the daily carbohydrate for 4 weeks, with a 2-week washout period between alternative diets. All 33 subjects received two servings of either GMNs or PNs (400 g) per day, which replaced the main carbohydrate in two daily meals for 4 weeks. After a 2-week washout period, the subjects received the other type of noodle for 4 weeks. The body weight, BMI, waist circumference, fasting blood glucose and lipid profile, as well as serum vitamin A, E, β-carotene and high sensitivity C-reactive protein (hs-CPR) were measured by HPCL.

Interventions

DIETARY_SUPPLEMENTGlucomannan noodle

The participants received two servings (400 g) of GMN every day to replace their daily carbohydrate intake for 4 weeks.

DIETARY_SUPPLEMENTPlacebo noodle

In the placebo noodle diet, the participants received the same amount of noodles without glucomannan for 4 weeks.

Sponsors

Taipei Medical University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
PREVENTION
Masking
SINGLE (Subject)

Eligibility

Sex/Gender
ALL
Age
20 Years to 64 Years
Healthy volunteers
No

Inclusion criteria

Adults with metabolic syndrome Subjects were considered to have metabolic syndrome if subjects had 3 of the following 5 characteristics: 1. Abdominal obesity (waist circumference \>= 90 cm in men and \>= 80 cm in women) 2. Impaired fasting glucose ( \>= 5.6 mmol/L) 3. Hypertriglyceridemia ( \>= 1.7 mmol/L) 4. Low HDL-C (\< 1.0 mmol/L in men and \< 1.3 mmol/L in women) 5. Increased blood pressure (SBP \>= 130 mmHg and DBP \>= 85 mmHg).

Exclusion criteria

1. Liver and renal diseases 2. Undergoing statin therapy 3. Pregnancy women 4. Taking antioxidant vitamins supplements

Design outcomes

Primary

MeasureTime frameDescription
Body Weight4 weeksBody weight by weighting scale (kilogram). Lower scores mean a better outcome in subjects.

Secondary

MeasureTime frameDescription
Glycemic Index4 weeksHbA1c (glycated hemoglobin) analysis
Lipid Index4 weeksLDL-C (low density lipoprotein cholesterol) analysis
Waist Circumference4 weeksBody waist by tape in centimeter

Participant flow

Participants by arm

ArmCount
First GMN Then PN
First Intervention (4 weeks, GMN), Washout (2 weeks) and Second Intervention (4 weeks, PN)
16
First PN Then GMN
First Intervention (4 weeks, PN), Washout (2 weeks) and Second Intervention (4 weeks, GMN)
16
Total32

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyWithdrawal by Subject22

Baseline characteristics

CharacteristicFirst GMN Then PNFirst PN Then GMNTotal
Age, Continuous57.75 years
STANDARD_DEVIATION 4.96
49.82 years
STANDARD_DEVIATION 12.59
50.79 years
STANDARD_DEVIATION 10.78
Sex: Female, Male
Female
8 Participants8 Participants16 Participants
Sex: Female, Male
Male
8 Participants8 Participants16 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 320 / 32
other
Total, other adverse events
0 / 320 / 32
serious
Total, serious adverse events
0 / 320 / 32

Outcome results

Primary

Body Weight

Body weight by weighting scale (kilogram). Lower scores mean a better outcome in subjects.

Time frame: 4 weeks

ArmMeasureGroupValue (MEAN)Dispersion
GMN DietBody WeightBaseline75.2 kgStandard Deviation 10.86
GMN DietBody WeightEnd74.41 kgStandard Deviation 10.49
PN DietBody WeightBaseline74.97 kgStandard Deviation 11.44
PN DietBody WeightEnd74.39 kgStandard Deviation 11.27
Secondary

Glycemic Index

HbA1c (glycated hemoglobin) analysis

Time frame: 4 weeks

ArmMeasureGroupValue (MEAN)Dispersion
GMN DietGlycemic IndexBaseline7.28 percentageStandard Deviation 1.65
GMN DietGlycemic IndexEnd7.08 percentageStandard Deviation 1.54
PN DietGlycemic IndexBaseline7.21 percentageStandard Deviation 1.69
PN DietGlycemic IndexEnd7.12 percentageStandard Deviation 1.6
Secondary

Lipid Index

LDL-C (low density lipoprotein cholesterol) analysis

Time frame: 4 weeks

ArmMeasureGroupValue (MEAN)Dispersion
GMN DietLipid IndexBaseline133.86 mg/dLStandard Deviation 32.54
GMN DietLipid IndexEnd137.24 mg/dLStandard Deviation 33.99
PN DietLipid IndexBaseline135.39 mg/dLStandard Deviation 28.02
PN DietLipid IndexEnd130.53 mg/dLStandard Deviation 33.63
Secondary

Waist Circumference

Body waist by tape in centimeter

Time frame: 4 weeks

ArmMeasureGroupValue (MEAN)Dispersion
GMN DietWaist CircumferenceBaseline92.03 cmStandard Deviation 6.69
GMN DietWaist CircumferenceEnd90.17 cmStandard Deviation 6.8
PN DietWaist CircumferenceBaseline91.14 cmStandard Deviation 7.26
PN DietWaist CircumferenceEnd90.15 cmStandard Deviation 7.11

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026