ClinicalTrials.gg
CompletedNCT06972524Updated Nov 9, 2026

Effects of Probiotics and Plant Extracts Supplementation on Glycemic Control in Adults With Prediabetes: A Randomized, Double-Blind, Placebo-Controlled Trial

An interventional study of probiotics and plant extracts supplementation and The placebo consisted of microcrystalline cellulose in Pre-biabetes, sponsored by Huilian Zhu. Completed at 1 site in China. Open to participants aged 40 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-11-09.

Sponsored by Huilian Zhu · Not applicable, Interventional, and Basic science

Updated Nov 9, 2026Now CompletedFirst site in China+9 moreGo to Updates ↓
Phase
Not applicable
Study type
Interventional
Enrollment
110
Allocation
Randomized
Ages
40 Years to 75 Years
Sex
All
01

Study summary

This study aimed to investigate the effects of probiotics and plant extracts supplementation on glucose control in adults with prediabetes.

02

Conditions studied

  • Pre-biabetes

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Keywords

  • prediabetes; probiotics; gut microbiota; plant extracts; continuous glucose monitoring
03

In context

Prediabetic State

918 studies on the registry are indexed under Prediabetic State; 232 are open to participants now.

This study's enrollment of 110 is above the median of 62 across 762 interventional studies indexed under Prediabetic State.

Browse Prediabetic State studies →

Lead sponsor

Huilian Zhu is the lead sponsor of 8 studies on the registry; 3 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

The criteria were revised on the registry on Nov 9, 2026. See what changed

Ages eligible
40 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

Participants were eligible for inclusion if they were aged 40-75 years and had impaired fasting glucose (5.6 mmol/L ≤ FBG \< 6.9 mmol/L) or an level of 5.7-6.4%.

Key exclusion criteria were: 1) diagnosed diabetes or use of glucose-lowering medications; 2) oral antibiotic use within the preceding 2 weeks or inability or unwillingness to discontinue fiber, prebiotic, probiotic, or synbiotic supplements; 3) gastrointestinal disorders affecting digestion or absorption, or severe endocrine, cardiovascular, cerebrovascular, malignant, or other metabolic diseases; 4) pregnancy, breastfeeding, or planned pregnancy within the following 3 months; 5) weight change of >5% within the preceding 3 months or planned weight loss or dietary modification; 6) alcohol consumption >40 g/day; 7) cognitive impairment, communication difficulties, or other conditions preventing trial completion; and 8) participation in another clinical trial within the preceding 3 months or during the study.

Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
110 participants (actual)

Study arms

  • Experimental
    Probiotic and Plant Extracts Group

    The probiotics and plant extract supplementation was provided as a powder in individual sachets, each containing 1.5 g. Each sachet contained 5 × 10¹⁰ colony forming units of two probiotic strains, including Lacticaseibacillus paracasei LC-19 and Bifidobacterium animalis subsp. lactis MN-Gup, and mixed plant extracts, consisting of white kidney bean extract, mulberry leaf extract, and bitter melon extract.

    Dietary Supplement: probiotics and plant extracts supplementation

  • Placebo comparator
    placebo group

    The placebo consisted of microcrystalline cellulose without probiotic strains or plant extracts.

    Dietary Supplement: The placebo consisted of microcrystalline cellulose

Interventions

  • Dietary supplementprobiotics and plant extracts supplementation

    The probiotics and plant extracts supplementation was provided as a powder in individual sachets, each containing 1.5 g. Each sachet contained 5 × 10¹⁰ colony forming units of two probiotic strains, including Lacticaseibacillus paracasei LC-19 and Bifidobacterium animalis subsp. lactis MN-Gup, and mixed plant extracts, consisting of white kidney bean extract, mulberry leaf extract, and bitter melon extract.

  • Dietary supplementThe placebo consisted of microcrystalline cellulose

    The placebo consisted of microcrystalline cellulose and was matched to the active intervention in appearance, taste, and dosage. Participants received two sachets daily for 8 weeks, following the same administration schedule as the intervention group.

06

What researchers measure

Primary outcomes

  1. fasting blood glucose

    At baseline, and 8 weeks, investigators will use automatic electrochemiluminescence analyzer to examine fasting blood glucose.

    Time frame: Baseline to Week 8

  2. 2h-piAUC after standardized OGTT

    the positive increment of area under curve in 2 hours after OGTT, measured by continuous glucose monitoring at baseline, and 8 weeks.

    Time frame: Baseline to Week 8

  3. TIR (time in range)

    TIR refers to the time when blood glucose is controlled within a reasonable ( target ) range (3.9\~10.0 mmol/L), measured by continuous glucose monitoring at baseline and 8 weeks.

    Time frame: Baseline to Week 8

Secondary outcomes

  1. HbA1c

    At baseline, and 8 weeks, investigators will use automatic electrochemiluminescence analyzer to examine HbA1c.

    Time frame: Baseline to Week 8

  2. weight

    at baseline, and 8 weeks, investigators will examine weight.

    Time frame: Baseline to Week 8

  3. intestinal bacteria

    At baseline, and 8 weeks, investigators will use 16S rRNA pyrosequencing to examine intestinal bacteria.

    Time frame: Baseline to Week 8

  4. lipid metabolism

    At baseline, and 8 weeks, investigators will use automatic electrochemiluminescence analyzer to examine total cholesterol, low density lipoprotein, high density lipoprotein, triglyceride.

    Time frame: Baseline to Week 8

  5. blood pressure

    At baseline, and 8 weeks, investigators will test the systolic blood pressure and diastolic blood pressure using automatic digital blood pressure monitor

    Time frame: Baseline to Week 8

  6. Continuous Glucose Monitoring (CGM) Data

    At baseline, and 8 weeks, investigators will using Continuous Glucose Monitoring (CGM) to monitor the glucose level of participants

    Time frame: Baseline to Week 8

07

Study locations

1 site
  • Zhongshan People's Hospital
    Zhongshan, Guangdong 528403, China
08

Updates

1 registry update since Sep 25, 2026
Status
Not yet recruiting→Completed
changed Nov 9, 2026
Sites
1 site added — first site in China
Show site
  • Zhongshan People's Hospital · Zhongshan, China
Nov 9, 2026
Start date
Dec 1, 2025→Nov 1, 2025 (actual)
Nov 9, 2026
Primary completion
May 30, 2026→Mar 30, 2026 (actual)
Nov 9, 2026
Study completion
Jun 30, 2026→Mar 30, 2026 (actual)
Nov 9, 2026
Eligibility
3 inclusion criteria removed; 9 exclusion criteria removed; 1 criterion edited, 1 added
What changed in the criteria
  • EditedImpairedParticipants were eligible for inclusion if they were aged 40-75 years and had impaired fasting glucose (5.6 mmol/L ≤ FPGFBG < 6.9 mmol/L) or glycated hemoglobin (HbA1c) betweenan HbA1c level of 5.7-6.4% (39-47 mmol/mol).
  • AddedKey exclusion criteria were: 1) diagnosed diabetes or use of glucose-lowering medications; 2) oral antibiotic use within the preceding 2 weeks or inability or unwillingness to discontinue fiber, prebiotic, probiotic, or synbiotic supplements; 3) gastrointestinal disorders affecting digestion or absorption, or severe endocrine, cardiovascular, cerebrovascular, malignant, or other metabolic diseases; 4) pregnancy, breastfeeding, or planned pregnancy within the following 3 months; 5) weight change of >5% within the preceding 3 months or planned weight loss or dietary modification; 6) alcohol consumption >40 g/day; 7) cognitive impairment, communication difficulties, or other conditions preventing trial completion; and 8) participation in another clinical trial within the preceding 3 months or during the study.
Inclusion criteria
  • RemovedAge between 40 and 75 years, regardless of gender.
  • RemovedResided in Guangzhou for the past six months and no plans to relocate or travel outside the city in the next month.
  • RemovedSigned informed consent form and voluntarily agreed to participate in the project.
Exclusion criteria
  • RemovedPatients with a confirmed diagnosis of diabetes who are currently taking glucose-lowering medications (e.g., insulin, GLP-1 receptor agonists, or SGLT2 inhibitors).
  • RemovedIndividuals with lactose intolerance or dairy product intolerance.
  • RemovedPregnant, planning to become pregnant within the next three months, or currently breastfeeding.
  • RemovedWeight change > 5% in the past three months or plans to lose weight or change dietary habits.
  • RemovedAlcohol consumption > 40g/day.
  • RemovedIndividuals with communication barriers, cognitive impairments, or other conditions that may prevent them from completing the study procedures.
  • RemovedSevere diseases that may affect participation in the study, including but not limited to endocrine disorders, severe cardiovascular or cerebrovascular diseases, cancer, metabolic diseases, etc.
  • RemovedParticipation in or current involvement in other clinical trials within the past three months.
  • RemovedNo use of antibiotic medications within the past three months.
Nov 9, 2026
Interventions
Added Dietary supplement: probiotics and plant extracts supplementation·Dietary supplement: The placebo consisted of microcrystalline cellulose; removed Dietary supplement: a special probiotics from Mengniu Group, supplemented with milk powder·Dietary supplement: regular milk powder does not contain any additional supplementation, and the color, flavor, shape, taste, and weight are same with the probiotic milk powder. Arms added: Probiotic and Plant Extracts Group; arms removed: probiotics group
Nov 9, 2026
Primary outcomes
1 edited, 2 time frame changed
What changed in the outcomes
  • Edited2h-piAUC after standardized breakfastOGTTTime frame: up to 8 weeks → Baseline to Week 8
  • Time framefasting blood glucoseup to 8 weeks → Baseline to Week 8
  • Time frameTIR (time in range)up to 8 weeks → Baseline to Week 8
Nov 9, 2026
Secondary outcomes
6 time frame changed, 1 removed, 1 description edited
What changed in the outcomes
  • Removedsleep qualityTime frame: up to 8 weeks
  • Time frameHbA1cup to 8 weeks → Baseline to Week 8
  • Time frameweightup to 8 weeks → Baseline to Week 8
  • Time frameintestinal bacteriaup to 8 weeks → Baseline to Week 8
  • Time framelipid metabolismup to 8 weeks → Baseline to Week 8
  • Time frameblood pressureup to 8 weeks → Baseline to Week 8
  • Time frameContinuous Glucose Monitoring (CGM) Dataup to 8 weeks → Baseline to Week 8
  • Descriptionweight: how it is measured was reworded
Nov 9, 2026
Title
Effects of Milk Probiotics Intervention on Blood Glucose Control Middle-aged and Elderly People With Pre-diabetes→Effects of Probiotics and Plant Extracts Supplementation on Glycemic Control in Adults With Prediabetes: A Randomized, Double-Blind, Placebo-Controlled Trial
Nov 9, 2026
Show all 1 update
  1. Nov 9, 2026
    Not yet recruiting→Completed
    1 site added — first site in China
    Show site
    • Zhongshan People's Hospital · Zhongshan, China
    Start date Dec 1, 2025→Nov 1, 2025 (now actual)
    Primary completion May 30, 2026→Mar 30, 2026 (now actual)
    Study completion Jun 30, 2026→Mar 30, 2026 (now actual)
    Eligibility 3 inclusion criteria removed; 9 exclusion criteria removed; 1 criterion edited, 1 added
    What changed in the criteria
    • EditedImpairedParticipants were eligible for inclusion if they were aged 40-75 years and had impaired fasting glucose (5.6 mmol/L ≤ FPGFBG < 6.9 mmol/L) or glycated hemoglobin (HbA1c) betweenan HbA1c level of 5.7-6.4% (39-47 mmol/mol).
    • AddedKey exclusion criteria were: 1) diagnosed diabetes or use of glucose-lowering medications; 2) oral antibiotic use within the preceding 2 weeks or inability or unwillingness to discontinue fiber, prebiotic, probiotic, or synbiotic supplements; 3) gastrointestinal disorders affecting digestion or absorption, or severe endocrine, cardiovascular, cerebrovascular, malignant, or other metabolic diseases; 4) pregnancy, breastfeeding, or planned pregnancy within the following 3 months; 5) weight change of >5% within the preceding 3 months or planned weight loss or dietary modification; 6) alcohol consumption >40 g/day; 7) cognitive impairment, communication difficulties, or other conditions preventing trial completion; and 8) participation in another clinical trial within the preceding 3 months or during the study.
    Inclusion criteria
    • RemovedAge between 40 and 75 years, regardless of gender.
    • RemovedResided in Guangzhou for the past six months and no plans to relocate or travel outside the city in the next month.
    • RemovedSigned informed consent form and voluntarily agreed to participate in the project.
    Exclusion criteria
    • RemovedPatients with a confirmed diagnosis of diabetes who are currently taking glucose-lowering medications (e.g., insulin, GLP-1 receptor agonists, or SGLT2 inhibitors).
    • RemovedIndividuals with lactose intolerance or dairy product intolerance.
    • RemovedPregnant, planning to become pregnant within the next three months, or currently breastfeeding.
    • RemovedWeight change > 5% in the past three months or plans to lose weight or change dietary habits.
    • RemovedAlcohol consumption > 40g/day.
    • RemovedIndividuals with communication barriers, cognitive impairments, or other conditions that may prevent them from completing the study procedures.
    • RemovedSevere diseases that may affect participation in the study, including but not limited to endocrine disorders, severe cardiovascular or cerebrovascular diseases, cancer, metabolic diseases, etc.
    • RemovedParticipation in or current involvement in other clinical trials within the past three months.
    • RemovedNo use of antibiotic medications within the past three months.
    Primary outcomes 1 edited, 2 time frame changed
    What changed in the outcomes
    • Edited2h-piAUC after standardized breakfastOGTTTime frame: up to 8 weeks → Baseline to Week 8
    • Time framefasting blood glucoseup to 8 weeks → Baseline to Week 8
    • Time frameTIR (time in range)up to 8 weeks → Baseline to Week 8
    Secondary outcomes 6 time frame changed, 1 removed, 1 description edited
    What changed in the outcomes
    • Removedsleep qualityTime frame: up to 8 weeks
    • Time frameHbA1cup to 8 weeks → Baseline to Week 8
    • Time frameweightup to 8 weeks → Baseline to Week 8
    • Time frameintestinal bacteriaup to 8 weeks → Baseline to Week 8
    • Time framelipid metabolismup to 8 weeks → Baseline to Week 8
    • Time frameblood pressureup to 8 weeks → Baseline to Week 8
    • Time frameContinuous Glucose Monitoring (CGM) Dataup to 8 weeks → Baseline to Week 8
    • Descriptionweight: how it is measured was reworded
    Interventions Added Dietary supplement: probiotics and plant extracts supplementation·Dietary supplement: The placebo consisted of microcrystalline cellulose; removed Dietary supplement: a special probiotics from Mengniu Group, supplemented with milk powder·Dietary supplement: regular milk powder does not contain any additional supplementation, and the color, flavor, shape, taste, and weight are same with the probiotic milk powder. Arms added: Probiotic and Plant Extracts Group; arms removed: probiotics group
    Title Effects of Milk Probiotics Intervention on Blood Glucose Control Middle-aged and Elderly People With Pre-diabetes→Effects of Probiotics and Plant Extracts Supplementation on Glycemic Control in Adults With Prediabetes: A Randomized, Double-Blind, Placebo-Controlled Trial
    + 4 other changes: index terms, verification date, description and conditions

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

09

Registry details

Key details

Study ID
NCT06972524
Lead sponsor
Huilian Zhu
Responsible party
Huilian Zhu (Professor, Sun Yat-sen University) — Sponsor-investigator
First posted
May 15, 2025
Start date
Nov 1, 2025
Primary completion
Mar 30, 2026
Completion
Mar 30, 2026
Last update
Nov 9, 2026

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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