Evaluation of RSB11-HI Postbiotic Supplementation for Supporting Weight Management, Metabolic Wellness, and Quality of Life in Healthy Adults

August 26, 2026 updated by: Able Biolabs, LLC

A Randomized, Double-Blind, Placebo-Controlled Clinical Trial to Evaluate the Safety and Efficacy of RSB11-HI Postbiotic Supplementation for Supporting Weight Management, Metabolic Wellness, and Quality of Life in Healthy Adults

This randomized, double-blind, placebo-controlled clinical trial will evaluate the safety, tolerability, and efficacy of RSB11-HI, a heat-inactivated postbiotic, in healthy adults over an 8-week intervention period. Participants will be classified into one of three predefined study populations-General Healthy, Perimenopausal, or Mild Inflammation-and will then be randomized within their assigned population to receive either RSB11-HI or placebo. The study will evaluate the effects of supplementation on healthy weight management, metabolic wellness, gastrointestinal health, and quality of life, while also exploring whether responses differ among the predefined study populations.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This 8-week, randomized, double-blind, placebo-controlled, decentralized clinical trial will evaluate the safety, tolerability, and efficacy of RSB11-HI, a heat-inactivated postbiotic derived from *Lactiplantibacillus plantarum* RSB11, in healthy adults. Following eligibility screening, participants will be classified into one of three predefined study populations-General Healthy, Perimenopausal, or Mild Inflammation-and randomized within their assigned population to receive RSB11-HI or placebo. The study will evaluate potential effects on healthy weight management, metabolic wellness, gastrointestinal health, and quality of life, while exploratory analyses will assess treatment responses across the predefined study populations.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
120

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Male or female, 18 to 55 years of age.
  • Body Mass Index (BMI) between 23 and 32 kg/m² at screening.
  • Able and willing to provide electronic informed consent.
  • Willing and able to comply with all study procedures and scheduled assessments.
  • Willing to maintain usual dietary habits and physical activity throughout the study period.
  • Access to a smartphone, tablet, or computer with reliable internet connectivity to complete remote study assessments.
  • Willing to refrain from initiating new dietary supplements, structured weight management programs, or significant lifestyle modifications intended to influence study outcomes during study participation.

Exclusion Criteria:

  • Participation in another interventional clinical study within 30 days prior to screening.
  • Current use of prescription medications intended for weight management.
  • Current use of probiotic or postbiotic supplements that cannot be discontinued at least 4 weeks prior to enrollment.
  • Antibiotic use within 4 weeks prior to screening.
  • Pregnancy, planned pregnancy during the study period, or breastfeeding.
  • Known allergy or hypersensitivity to any component of the investigational product or placebo.
  • History of any gastrointestinal condition, metabolic disorder, or other clinically significant medical condition that, in the opinion of the investigator, could interfere with study participation or interpretation of study results.
  • Any physical, psychological, or behavioral condition that, in the opinion of the investigator, would make participation unsafe or compromise compliance with the study protocol.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: RSB11-HI Heat-Inactivated Postbiotic
Participants assigned to this arm will receive RSB11-HI Heat-Inactivated Postbiotic orally once daily for 8 consecutive weeks according to the study dosing instructions.
Dietary supplement: RSB11-HI Heat-Inactivated Postbiotic
RSB11-HI is a heat-inactivated postbiotic derived from Lactiplantibacillus plantarum RSB11. Participants will receive the assigned study product orally once daily for 8 consecutive weeks according to the study dosing instructions.
Placebo Comparator: Placebo
Participants assigned to this arm will receive the matched placebo orally once daily for 8 consecutive weeks according to the study dosing instructions. The placebo is identical in appearance, packaging, labeling, and administration schedule to the RSB11-HI study product to maintain blinding.
Other: Placebo
Matched placebo administered orally once daily for 8 consecutive weeks. The placebo is identical in appearance, packaging, labeling, and administration schedule to the RSB11-HI study product to maintain blinding.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change in Body Weight From Baseline to Week 8
Time Frame: Baseline to Week 8
Change in body weight, measured in kilograms (kg), from Baseline (Week 0) to End of Study (Week 8). The change in body weight will be compared between the RSB11-HI and placebo groups.
Baseline to Week 8

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change in Body Mass Index (BMI)
Time Frame: Baseline, Week 4, and Week 8
Change in BMI (kg/m²) from Baseline to Weeks 4 and 8.
Baseline, Week 4, and Week 8
Change in Waist Circumference
Time Frame: Baseline, Week 4, and Week 8
Change in waist circumference from Baseline to Weeks 4 and 8.
Baseline, Week 4, and Week 8
Change in Appetite and Satiety
Time Frame: Baseline, Week 4, and Week 8
Change in appetite and satiety as assessed using the Appetite Visual Analog Scale (VAS). The assessment includes four items evaluating current hunger, fullness, desire to eat, and prospective food consumption. Each item is rated from 0 to 100, with higher scores indicating a greater level of the sensation being assessed (e.g., greater hunger, greater fullness, greater desire to eat, or greater perceived capacity to eat).
Baseline, Week 4, and Week 8
Change in General Well-Being
Time Frame: Baseline, Week 4, and Week 8
Change in general well-being as assessed using the World Health Organization Five Well-Being Index (WHO-5). The questionnaire consists of 5 items, each scored from 0 (At no time) to 5 (All of the time), resulting in a raw total score ranging from 0 to 25. Higher scores indicate better well-being.
Baseline, Week 4, and Week 8
Change in Perceived Stress
Time Frame: Baseline, Week 4, and Week 8
Change in perceived stress as assessed using the 10-item Perceived Stress Scale (PSS-10). Each item is rated from 0 (Never) to 4 (Very Often). The total score ranges from 0 to 40, with higher scores indicating greater perceived stress.
Baseline, Week 4, and Week 8
Change in Gastrointestinal Symptoms
Time Frame: Baseline, Week 4, and Week 8
Change in gastrointestinal symptoms as assessed using the Gastrointestinal Symptom Rating Scale (GSRS). The questionnaire contains 15 gastrointestinal symptom items, each rated from 1 (No discomfort) to 7 (Very severe discomfort). Item scores range from 1 to 7, with higher scores indicating greater gastrointestinal symptom severity.
Baseline, Week 4, and Week 8
Change in Menopause-Related Quality of Life
Time Frame: Baseline, Week 4, and Week 8
Change in menopause-related quality of life as assessed using the Menopause-Specific Quality of Life Questionnaire (MENQOL) in participants assigned to the Perimenopausal Wellness Population. The questionnaire assesses symptoms across vasomotor, psychosocial, physical, and sexual domains. For symptoms experienced, bother is rated from 0 (Not bothersome) to 6 (Extremely bothersome); participants may also indicate that a symptom was not experienced. Higher scores indicate greater symptom bother and worse menopause-related quality of life.
Baseline, Week 4, and Week 8

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Able Biolabs, LLC

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Omkara Sai Kiran Pala, PharmD, Able Biolabs

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 1, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
November 1, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 24, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 24, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 27, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 28, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 26, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
August 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • RSB11-HI-001

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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