ClinicalTrials.gg
CompletedNCT05363618Updated Jul 18, 2023

Tolerability Study of Panosyl-Isomaltooligosaccharides (PIMO) and a Placebo in Subjects With Heartburn

An interventional study of Panosyl-isomaltooligosaccharides (PIMO) 1g (1.4 ml) and Placebo 1.4 ml in Heartburn, sponsored by Microbiome Health Sciences. Completed at 1 site in United States. Open to participants aged 18 Years to 75 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-07-18.

Sponsored by Microbiome Health Sciences · Not applicable, Interventional, and Other

Phase
Not applicable
Study type
Interventional
Enrollment
211
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
01

Study summary

Remote un-controlled trial to evaluate the tolerability of MHS-1031 and separately the tolerability of the formulated placebo in subjects with heartburn. Candidates will have heartburn and be taking daily PPIs at up to twice the standard OTC or prescription dosage. Approximately 400 subjects (men and women of all races and ethnicities) will be randomly enrolled in a 1:1 ratio to receive Product or Placebo (1.4 ml) per day.

Read the detailed description

This study will be conducted as a remote un-controlled trial to evaluate the tolerability of MHS-1031 and separately the tolerability of the formulated placebo in two similar subject groups with heartburn. Candidates will have heartburn and be taking daily PPIs at up to twice the standard OTC or prescription dosage.

Approximately 400 subjects (men and women of all races and ethnicities) will be randomly enrolled in a 1:1 ratio to receive Product or Placebo (1.4 ml) per day.

Screening phase: 14 days

Product/Placebo phase: 56 days. From Day 1 through Day 28 each subject will continue taking their usual daily PPI. Beginning on Day 29 and through Day 56 subjects will be requested to not take a PPI. Subjects may re-start taking a PPI at any time.

Product Phase: 28 days. All subjects will receive MHS-1031.

Follow-Up Phase: Subjects who complete the Product Phase of the study will enter into a 14-day Follow-up Phase, during which subjects will take neither placebo nor MHS-1031.

For entry into the Screening Phase, subjects must have the following history: Heartburn experienced at least 1 day per week while taking a PPI.

During the study, tolerability will be assessed via on-line validated PRO questionnaires and assessment of adverse events. Tolerability is defined as no overall worsening of heartburn measurement scores after 8 weeks of taking the product or the placebo compared to baseline scores.

02

Conditions studied

  • Heartburn

Keywords

  • Heartburn
  • microbiome
  • acid reflux
  • PIMO
  • indigestion
03

In context

Heartburn

154 studies on the registry are indexed under Heartburn; 12 are open to participants now.

This study's enrollment of 211 is above the median of 100 across 127 interventional studies indexed under Heartburn.

Browse Heartburn studies →

Lead sponsor

Microbiome Health Sciences is the lead sponsor of 3 studies on the registry; none are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

For Screening Phase inclusion, subjects must meet all the following inclusion criteria to be eligible for enrollment into the study:

  1. Subject is willing and able to participate in the study for the required duration, understand and provide signed , and agrees to undergo all protocol activities.
  2. Subject is proficient in reading, writing, and speaking English.
  3. Subject is able to complete all required electronic Daily RESQ-eD questionnaires, daily medication questionnaires (Screening Phase, Product/Placebo Phase, Product Phase, and Follow-up Phase), daily General Well-being questionnaire (Screening Phase Only), 4-item Patient Health Questionnaire for Depression and Anxiety (PHQ-4) (Screening Phase Day 14), and monthly Participant Global Assessment questionnaire (Product/Placebo Phase, Product Phase).
  4. Have access to a computer/tablet/phone with internet access and active e-mail account in order to complete electronic surveys daily throughout study participation.
  5. Males or females between 18 and 75 years of age (inclusive), with a ≥ 19 and \< 35 kg/m2.
  6. Females must not be pregnant or lactating.
  7. Female Subjects of non- whether surgically sterile or
  8. Female Subjects of childbearing potential must agree to use adequate from the time of informed consent to the last dose of study product or placebo.
  9. Must be on stable doses of medications, if any, prescribed for chronic conditions.
  10. Subject must be taking daily PPI (defined as 5 to 7 days per week) of no more than one type (see "a" through "f" below) at no more than twice the standard prescription dose for their specific PPI type, for 4 consecutive weeks prior to the Screening Call, selected from the following list of medications:

    1. omeprazole (no more than 40 mg/day)
    2. esomeprazole (no more than 40 mg/day)
    3. lansoprazole (no more than 60 mg/day)
    4. dexlansoprazole (no more than 60 m/dayg)
    5. pantoprazole (no more than 80 mg/day)
    6. rabeprazole (no more than 40 mg/day)
  11. History of a minimum of 3 months of heartburn (ie, "burning feeling behind the breastbone" and/or "pain behind your breastbone" and/or "heartburn" per questions 1, 2 or 3 of RESQ-eD).

Exclusion criteria

Exclusion Criteria:

  1. Subject has not maintained a stable diet for ≥ 30 days prior to the Screening Call or is unwilling to maintain a stable diet during the study.
  2. Subject has had a surgical procedure requiring general anesthesia \< 60 days prior to the Screening Call.
  3. Subject has had a colonoscopy in the past 30 days or is scheduled for colonoscopy within the next 4 months and is unable/unwilling to postpone until the completion of study participation.
  4. Subject has a history of cancer (other than basal cell carcinoma of the skin) unless the has been in a complete remission without maintenance therapy (eg, chemotherapy, radiation, surgery) for ≥ 5 years prior to the Screening Call.
  5. Subject has any acute or chronic illness that could confound outcome assessments for this study, including, but not limited to:

    1. Known history of untreated peptic or gastric ulcer or Helicobacter pylori (H pylori) positivity without a history of successful treatment.
    2. Known history of ulcerative colitis, Crohn's disease, colon cancer, current stomach ulcers, pancreatitis, diverticulitis
    3. Known history of acute or chronic virus (HBV), virus (HCV), or (HIV) infection
    4. Known or suspected alcoholism, drug addiction, or significant drug abuse within 1 year of the Screening Call
  6. Subject has any known medical condition, clinical signs and symptoms, vital signs, abnormal laboratory, or other testing, considered by the Investigator, that could interfere with the subject's participation in and completion of the study including, but not limited to:

    1. Uncontrolled hypertension
    2. Diabetes uncontrolled by diet (ie, requiring oral medication or insulin)
    3. Previous anaphylactic reaction to any medication
    4. History of adrenal disease, diabetic nephropathy, or gastroparesis
    5. Uncontrolled hypothyroidism
    6. Untreated mental disorder
    7. Spinal cord injury
  7. Subject has had a cerebrovascular event (stroke) or myocardial infarction (MI) in the last 6 months
  8. Subject has a physiologic or structural abnormality of the GI tract, or disease or condition that can affect GI motility, or defecation
  9. Subject has plans to travel outside the USA during the study period
  10. Subject has a current COVID19 infection, or a history of a prior COVID19 infection with ongoing symptoms suggestive of "Long COVID"
  11. History of scleroderma, Barrett's esophagus, esophageal cancer, esophageal stricture, or esophageal scarring
  12. History of endoscopically determined erosive esophagitis of all classes (eg, LA grade A through D)
  13. Known hiatal hernia > 2cm
  14. History of surgery or endoscopic treatment including fundoplication and dilation for esophageal stricture
  15. History of gastric surgery (except for endoscopic removal of benign polyps) or bariatric surgery
  16. Subject has had a barium enema within 30 days of the Screening Call
  17. Subject has had a fecal impaction that required hospitalization or emergency room treatment within 3 months of the Screening Call
  18. Subject has a history diagnosis of an eating disorder in the last 5 years
  19. Subject has a history of substantiated (documented by computed tomography (CT) scan or hospitalization) diverticulitis, or any ongoing chronic condition (eg, polycystic kidney disease, endometriosis, ovarian cysts, or other) that may be associated with chronic abdominal pain or discomfort and might confound the assessments in this study during the 2 years prior to the Screening Call
  20. Subject has had surgery that meets any of the following criteria:

    1. Gastric bypass surgery or invasive procedure for the treatment of obesity or surgery to remove a segment of the GI tract at any time prior to the Screening Call
    2. Subjects who have had a gastric band unless the band has been completely removed > 60 days prior to the Screening Call
    3. Open surgery of the abdomen, pelvis, or retroperitoneal structures within 6 months prior to the Screening Call
    4. Laparoscopic appendectomy or cholecystectomy or other instrumentation of the bowel \< 60 days prior to the Screening Call
  21. Prior use of the Study Product MHS-1031
  22. History of any the following diseases that can cause heartburn (ie, "burning feeling behind the breastbone" and/or "pain behind your breastbone" and/or "heartburn" per RESQ-eD question 1, 2, or 3): eosinophilic esophagitis, angina, esophageal spasm, achalasia, rumination, or other conditions involving the mouth, throat, dysphagia, or dyspnea
  23. Active history of nicotine use, cannabis use, or alcohol abuse (defined as: > 14 drinks/week or 4 drinks/day for men, 7 drinks/week or 3 drinks/day for women). Has used any tobacco, nicotine, or cannabis products (of any type) in the last 6 months or has abused alcohol in the last 6 months
  24. Taking any excluded medications listed in the protocol (eg, metformin, antibiotics within the prior 6 months, and during the study)
  25. If female, is pregnant, lactating, or intending to become pregnant before or while participating in this study or intending to donate ova during such time period
  26. Use of colon prep or high colonic within 30 days prior to the Screening Call
  27. Narcotic (eg, opiate) use within 60 days of the Screening Call
  28. Antibiotic use within 60 days of the Screening Call
  29. Use of any product within 3 months or five half-lives (whichever is longer) prior to study entry
  30. Participation in another investigation (clinical trial) during the course of this study
  31. Participation in a rigorous weight loss program or have any planned changes in diet or lifestyle, such as getting married, change in residence, change in job, or other highly stressful event
  32. Diagnosis of inflammatory bowel disease, irritable bowel syndrome (IBS-D and IBSC), Chronic Idiopathic Constipation
  33. Regular use (ie, >=4 times per month) of antibacterial mouthwash (eg, Listerine, Scope, others) and unwilling to stop use for the duration of the study
  34. Subject previously took PPIs daily for heartburn, for at least 7 consecutive days in the past, and experienced no improvement
  35. Subject is employed by (or is a relative of an employee) or is involved in any way with Microbiome Health Sciences
  36. Other conditions or situations that, in the investigator's opinion, may put the subject at significant risk, may confound the study results, or may interfere significantly with the subject's participation in the study
Terms in these criteria, in plain language(11)

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.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
211 participants (actual)

Study arms

  • Active comparator
    Product Tolerability Arm

    Study Product MHS-1031 1g (1.4 ml) per day

    Dietary Supplement: Panosyl-isomaltooligosaccharides (PIMO) 1g (1.4 ml)

  • Placebo comparator
    Placebo Tolerability Arm

    Placebo (Neotame 7.92 mcg/g, phosphoric acid, and sterile water) 1.4 ml per day

    Other: Placebo 1.4 ml

Interventions

  • Dietary supplementPanosyl-isomaltooligosaccharides (PIMO) 1g (1.4 ml)

    Active study product

  • OtherPlacebo 1.4 ml

    Placebo

06

What researchers measure

Primary outcomes

  1. Tolerability as recorded via RESQ-eD (online PRO) questions

    Tolerability is defined as the proportion of subjects at day 56 with number of days reporting heartburn no greater than baseline. The number of "heartburn days" is defined as the number of days where an answer of \>0 (ie, Not "0 - Did not have") is recorded for any of the RESQ-eD questions: "burning feeling behind your breastbone", "pain behind your breastbone", and "heartburn". Subjects who are missing at day 56 will be considered to have not tolerated the study product or to have not tolerated the placebo.

    Time frame: 8 weeks

07

Study locations

1 site
  • Microbiome Health Sciences
    Manassas, Virginia 20109, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Feb 2022 to primary completion in May 2023, 15 months.

Of 26 interventional studies with no phase under Heartburn, half reached primary completion within 15 months of starting (the median), counting those still running; a quarter within 10 and three quarters within 35. This study's 15 months is close to that.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 27, 2022
First posted
May 6, 2022
StartActual
Feb 10, 2022
Primary completionActual
May 30, 2023
CompletionActual
May 30, 2023
Last update
Jul 18, 2023
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jul 18, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05363618
Lead sponsor
Microbiome Health Sciences
Responsible party
Sponsor
First posted
May 6, 2022
Start date
Feb 10, 2022
Primary completion
May 30, 2023
Completion
May 30, 2023
Last update
Jul 18, 2023

Study contacts

Peter Swann, MD
principal investigator · Microbiome Health Sciences

Oversight

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

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This study is completed, as verified in Jul 2023. You cannot join it, but the record below documents what was studied.

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