Multi-strain Probiotic Effects on Self-Reported Constipation

Recruiting now · Not applicable

Conditions studied: Constipation, Probiotic, Probiotic Intervention

In brief

Constipation is a prevalent gastrointestinal condition. Beyond simple lifestyle measures (e.g. increasing fibre intake, hydration, levels of exercise), medical therapies are available for management. However, a sizeable number of sufferers are dissatisfied with drug treatments (either over-the-counter or prescribed), meaning there is an unmet need for alternative therapeutic strategies. Pre, pro- and synbiotics have emerged as one alternative treatment, and a growing body of evidence now supports their use in a proportion of individuals with mild constipation. However, it is currently not possible to predict which individuals may benefit. A better understanding of an individuals' symptoms and underlying pathophysiology may allow for more targeted treatment. The multistrain live bacterial food product (probiotic) being tested contains billions of live and active bacteria that has been shown to improve symptoms in the irritable bowel syndrome (IBS: which is 'constipation-predominant' in many). Notably, improvements ('completely resolved' or 'some positive difference') in bowel habit satisfaction, abdominal pain, bloating and urgency, as well as on quality of life have been shown after 4 or more weeks of this probiotc. This study aims to have 20 participants with self-reported constipation to assess improvements in constipation symptoms, quality of life and measures of gut function.

Key facts

Study ID

NCT07275866

Run by

Dr Anthony Hobson

People needed

20

Starts

2025-10-03

Expected to finish

2026-04-01

Last updated by the study team

2025-12-18

Who can join

Age: 18 and older, up to 70. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Participant has provided written informed consent before participating in the study after being given a full description of the study and prior to any study-specific procedures being performed.
• Participant has Cleveland Clinic constipation score (CCCS) of 9-16 at screening call
• Participant is willing to discontinue all other therapies for constipation and undergo washout where applicable.
• Participant is a male or non-pregnant female and is 18-70 years of age
• If WOCBP participant is willing to adhere to one of the following methods of contraception:
• i) Hormonal contraception e.g. the 'pill' or an implant ii) Intrauterine device (IUD) iii) Intrauterine hormone-releasing system (IUS) vi) Sexual abstinence (if it is in line with participants' preferred and usual lifestyle).
• or has had a: v) Hysterectomy or has a: vi) Vasectomised partner
• Participant can communicate well with the Investigator and to comply with the requirements for the entire study.
• Participant has capacity to understand written English.
• Participant has a body mass index (BMI) of 18.5 - 39.9kg/m2 (bounds included).
• Participant agrees to follow all pre-test preparation for the ATMO capsule transit study.

You may not qualify if…

• Women who are pregnant and/or breastfeeding.
• Participants who are planning to significantly change their diet (e.g. weight loss program, becoming vegetarian) during the study period.
• Participant has had diarrhoea within 7 weeks of screening period.
• Prior abdominal surgery involving resection of the small or large bowel.
• Prior bariatric surgery involving resection of the stomach or by-pass procedures.
• Type 1 diabetes mellitus.
• Known organic or structural GI disease including:
• Coeliac disease
• Inflammatory bowel disease
• Diverticulitis
• Small bowel strictures
• Irritable bowel syndrome where the predominant symptom is pain (assessed via screening questions).
• Oropharyngeal dysphagia or difficulty swallowing capsules.
• Any other medical condition that the investigator deems may confound results or affect participants' safety in the study.
• Any use of prohibited medication that the participant cannot complete appropriate washout for.
• Insufficient knowledge of English to complete the daily bowel diary.
• Allergy to any component of the supplement, motility bar, lactulose or Zoe blue cookie.
• Participant is involved in this study as an investigator, sub-Investigator, study coordinator, other study staff, or Sponsor member.
• Previous use of the probiotic Symprove.

Where it is running

• The Functional Gut Clinic — London, United Kingdom (enrolling)

Full record on ClinicalTrials.gov

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