The Effects of Postbiotic Supplementation in Female Athletes (GIJane)
2026年5月29日 更新者：SPSKJOHN@ljmu.AC.UK、Liverpool John Moores University
The Effect of Daily Supplementation With Humiome® Post LB on Gastrointestinal Symptoms in Female Athletes. A Double-blinded Randomised Controlled Trial.
The goal of this clinical trial is to learn if a postbiotic supplement can reduce stomach and gut symptoms in physically active women.
The main questions it aims to answer are:
Does the supplement reduce gut symptoms during the menstrual cycle? Does it improve symptoms related to exercise?
Researchers will compare the postbiotic supplement to a placebo (a look-alike capsule that contains no active ingredient) to see if the supplement works.
Participants will be physically active, premenopausal female athletes.
Participants will:
Take either the postbiotic supplement or a placebo each day for two menstrual cycles Track their menstrual cycle and training Report gut symptoms using regular questionnaires Provide stool samples to assess gut health
This study will help researchers understand whether postbiotic supplements can improve gut health and reduce symptoms that may affect training and performance in female athletes.
調査の概要
詳細な説明
Female athletes commonly report gastrointestinal (gut) symptoms, particularly during exercise and at certain phases of the menstrual cycle. These symptoms can negatively affect comfort, training, and performance. Despite this, there is limited research examining strategies to reduce these symptoms in physically active women.
Postbiotics are non-living microbial products that may support gut health by improving the function of the gut barrier and influencing the gut microbiota. While previous research suggests that similar products may reduce gut symptoms in clinical and general populations, their effects in female athletes, particularly across the menstrual cycle, are not well understood.
This study is a randomized, placebo-controlled clinical trial designed to investigate the effects of daily postbiotic supplementation on gut symptoms in physically active, premenopausal female athletes. Participants will be randomly assigned to receive either a postbiotic supplement (Humiome® Post LB) or a placebo for two consecutive menstrual cycles.
Throughout the study, participants will record gut symptoms using validated questionnaires, with a focus on symptoms experienced during menstruation and across the menstrual cycle. Additional measures will include subtypes of gut symptoms (such as abdominal pain, diarrhoea, and constipation), training behaviour, and stool samples to assess gut microbiota composition and diversity.
The primary aim is to determine whether postbiotic supplementation reduces overall gut symptom severity during menstruation compared to placebo. Secondary analyses will explore changes in specific symptom types, gut microbiota outcomes, and training-related measures.
This research will provide new insight into the role of postbiotic supplementation in supporting gut health in female athletes and may help inform strategies to reduce symptoms that can impact training and performance.
研究の種類
介入
入学 (推定)
100
段階
- 適用できない
連絡先と場所
このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。
研究連絡先
- 名前：Kelsie Johnson, PhD
- 電話番号：+44 0151 231 2121
- メール：k.o.johnson@ljmu.ac.uk
研究連絡先のバックアップ
- 名前：Samantha Moss, PhD
- 電話番号：0151 231 2121
- メール：S.L.Moss@ljmu.ac.uk
研究場所
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Merseyside
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Liverpool、Merseyside、イギリス、L3 3AF
- 募集
- Tom Reilley Building
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コンタクト：
- Elizabeth Mahon, PhD
- メール：e.mahon@ljmu.ac.uk
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コンタクト：
- Samanvita Ravikanti, PhDc
- メール：s.ravikanti@2021.ljmu.ac.uk
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副調査官：
- Samanvita Ravikanti, PhDc
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副調査官：
- Maxine Gaivizo, BSc
-
-
参加基準
研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
はい
説明
Inclusion Criteria:
- Female, cisgender, premenopausal.
- Minimum age 18 years.
- Regular, natural menstrual cycle (21-35 days in duration), with 9 or more consecutive periods per year, if possible documented with tracker apps, calendars, or other tools
- Ability to give informed consent.
- Body mass index (BMI) ≥ 18.5 and < 24.9 kg/m²
- Agreeing to maintain lifestyle habits during the study (same dietary and physical activity habits)
- Having a smartphone and a history of consistent tracking of training and health records via apps.
- Having regular GI issues during exercise, and during menstruation. During pre-screening, this will be assessed with a shortened GSRS questionnaire, where participants need to have had, in the month preceding pre-screening, the equivalent of at least a score of 2 in a GSRS focus area (diarrhoea, pain, indigestion).
- No relevant self-reported abnormalities from medical history.
- Trained athlete (trains at least 3 times per week for more than 1 hour per day and who has been involved in endurance training for at least 2 years in alignment with previous research (Pfeiffer et al., 2010). This will be evaluated by assessing training records (Strava or similar applications, certificates of attendance at athletic events, club membership, etc.).
- Access to a health-care provider, who can be contacted by the CRO, and who reside in areas with available emergency health services.
Exclusion Criteria:
- Individuals who are pregnant, lactating, or plan to become pregnant before study end.
- Individuals with secondary amenorrhea.
- Individuals who use hormonal contraceptives during the last 6 months before (and during) the trial.
- Individuals who are currently participating in another clinical trial or have participated in a trial within the last two months prior to enrolment.
- Tobacco smokers and vapers.
- Individuals with acute illnesses.
- Individuals with a current musculoskeletal injury or one within the last month.
- Individuals taking probiotic supplements or have taken probiotics two weeks prior to enrolment.
- Individuals controlling chronic diseases with treatments known to alter the intestinal microbiome or to alter GI symptoms, such as certain pain killers, antacids, proton pump inhibitors, anti-diarrhoeal medication or supplements, and laxatives.
- Individuals having received antibiotics treatments within three months of trial start.
- Individuals having planned major changes in lifestyle (i.e. diet, weight loss program, exercise level, travelling) during the duration of the study.
- Individuals who have hypersensitivity/allergy to any of the components of the test product.
- Individuals who have planned major elective surgery during the study period.
研究計画
このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。
研究はどのように設計されていますか？
デザインの詳細
- 主な目的：処理
- 割り当て：ランダム化
- 介入モデル：並列代入
- マスキング：トリプル
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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実験的：Postbiotic Supplementation
All participants complete a one menstrual cycle placebo run-in phase before randomisation.
Participants in this arm then receive the postbiotic supplement daily for two consecutive menstrual cycles.
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Postbiotic supplement (Humiome® Post LB) administered as two oral capsules daily, providing 340 mg of postbiotic per day.
The supplement contains heat-inactivated microbial strains and fermentation products.
Participants will take the supplement daily for two consecutive menstrual cycles following a one-cycle placebo run-in phase.
Placebo capsules containing microcrystalline cellulose, matched in appearance to the postbiotic supplement.
Participants will take two capsules daily during a one-cycle placebo run-in phase and, if randomized to the placebo group, continue for two additional menstrual cycles.
|
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プラセボコンパレーター：Placebo
All participants complete a one menstrual cycle placebo run-in phase before randomisation.
Participants in this arm then continue taking placebo daily for two consecutive menstrual cycles.
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Placebo capsules containing microcrystalline cellulose, matched in appearance to the postbiotic supplement.
Participants will take two capsules daily during a one-cycle placebo run-in phase and, if randomized to the placebo group, continue for two additional menstrual cycles.
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この研究は何を測定していますか？
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Gastrointestinal Symptom Severity During Menstruation
時間枠：At the post menstruation assessment following completion of cycle 4 ~84-147 days depending on individual cycle and menstruation duration
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To assess the effect of daily consumption of Humiome® Post LB (HPLB) on menstrual cycle-related gastrointestinal symptoms (total amended Gastrointestinal Symptom Rating Scale scores; aGSRS) during the final intervention menstrual cycle (Phase 3) in physically active, premenopausal female athletes.
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At the post menstruation assessment following completion of cycle 4 ~84-147 days depending on individual cycle and menstruation duration
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Total Gastrointestinal Symptom Rating Scale (GSRS) score assessed weekly across the two intervention menstrual cycles.
時間枠：Weekly from the start of Cycle 2 through completion of Cycle 4 (up to 147 days from baseline; cycles range 21-35 days
|
To assess the effect of daily consumption of HPLB on menstrual cycle-related gastrointestinal symptoms (GSRS) during the second intervention menstrual cycle (Phase 2) in physically active, premenopausal female athletes, by comparing the HPLB group to the placebo group.
This is a 7-point Likert scale with 1 indicating "no discomfort at all" and 7 indicating "very severe discomfort".
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Weekly from the start of Cycle 2 through completion of Cycle 4 (up to 147 days from baseline; cycles range 21-35 days
|
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Total Gastrointestinal Symptom Rating Scale Score
時間枠：Weekly from the start of the start of the first intervention cycle (Cycle 2) through completion of the final intervention cycle (Cycle 4), up to 147 days from baseline
|
Between-group difference (HPLB vs placebo) in total Gastrointestinal Symptom Rating Scale (GSRS) score assessed weekly across the two intervention menstrual cycles.
This is a 7-point Likert scale with 1 indicating "no discomfort at all" and 7 indicating "very severe discomfort".
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Weekly from the start of the start of the first intervention cycle (Cycle 2) through completion of the final intervention cycle (Cycle 4), up to 147 days from baseline
|
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GSRS Sub-Category Scores
時間枠：Weekly from the start of the start of the first intervention cycle (Cycle 2) through completion of the final intervention cycle (Cycle 4), up to 147 days from baseline
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Between-group difference (HPLB vs placebo) in Gastrointestinal Symptom Rating Scale (GSRS) sub-category scores assessed weekly across the two intervention menstrual cycles, including reflux, abdominal pain, indigestion, diarrhoea, and constipation.
This is a 7-point Likert scale with 1 indicating "no discomfort at all" and 7 indicating "very severe discomfort".
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Weekly from the start of the start of the first intervention cycle (Cycle 2) through completion of the final intervention cycle (Cycle 4), up to 147 days from baseline
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Wilson Gastrointestinal Symptom Score
時間枠：Daily during menstruation on Day 1 (±1 day) of Cycle 2 (phase 2), Cycle 3 and Cycle 4 (phase 3). Up to 147 days from baseline.
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Between-group difference (HPLB vs placebo) in Wilson Gastrointestinal Symptom scores recorded daily during menstruation across both intervention cycles.
Gastrointestinal symptoms will be rated on a 0-10 Likert scale for that day.
The scale has descriptors of "no discomfort," "moderate discomfort," and "unbearable discomfort" at 0, 5, and 10, respectively.
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Daily during menstruation on Day 1 (±1 day) of Cycle 2 (phase 2), Cycle 3 and Cycle 4 (phase 3). Up to 147 days from baseline.
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Faecal microbial composition
時間枠：Menstruation on Day 1 (±1 day) of Cycle 2 (phase 2) and Cycle 4 (phase 3). Approximately 28-140 days from baseline depending on individual menstrual cycle duration.
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Between-group difference (HPLB vs placebo) in faecal microbial composition at phylum, genus, and species level measured using metagenomic sequencing.
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Menstruation on Day 1 (±1 day) of Cycle 2 (phase 2) and Cycle 4 (phase 3). Approximately 28-140 days from baseline depending on individual menstrual cycle duration.
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Faecal Microbial Diversity
時間枠：Menstruation on Day 1 (±1 day) of Cycle 2 (phase 2) and Cycle 4 (phase 3). Approximately 28-140 days from baseline depending on individual menstrual cycle duration.
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Between-group difference (HPLB vs placebo) in faecal microbial diversity at species level measured using metagenomic sequencing.
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Menstruation on Day 1 (±1 day) of Cycle 2 (phase 2) and Cycle 4 (phase 3). Approximately 28-140 days from baseline depending on individual menstrual cycle duration.
|
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Faecal Microbial Metabolites
時間枠：Menstruation on Day 1 (±1 day) of Cycle 2 (phase 2) and Cycle 4 (phase 3). Approximately 28-140 days from baseline depending on individual menstrual cycle duration.
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Between-group difference (HPLB vs placebo) in faecal microbial metabolites, including short-chain fatty acids.
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Menstruation on Day 1 (±1 day) of Cycle 2 (phase 2) and Cycle 4 (phase 3). Approximately 28-140 days from baseline depending on individual menstrual cycle duration.
|
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Adherence to Planned Training
時間枠：Weekly from the start of the first intervention cycle (Cycle 2) through completion of the final intervention cycle (Cycle 4), up to 147 days from baseline.
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Between-group difference (HPLB vs placebo) in adherence to physical activity training schedules, measured as the percentage of planned training sessions completed across the two intervention menstrual cycles.
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Weekly from the start of the first intervention cycle (Cycle 2) through completion of the final intervention cycle (Cycle 4), up to 147 days from baseline.
|
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Weekly Duration of Physical Training
時間枠：Weekly from the start of the first intervention cycle (Cycle 2) through completion of the final intervention cycle (Cycle 4), up to 147 days from baseline.
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Between-group difference (HPLB vs placebo) in average weekly minutes of physical training completed across the two intervention menstrual cycles.
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Weekly from the start of the first intervention cycle (Cycle 2) through completion of the final intervention cycle (Cycle 4), up to 147 days from baseline.
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Weeks With Moderately Severe or Worse Gastrointestinal Symptoms
時間枠：Weekly across the two intervention menstrual cycles
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Between-group difference (HPLB vs placebo) in the number of weeks with moderately severe or worse gastrointestinal symptoms, defined as a GSRS score of 4 or higher in any of the five symptom categories: reflux, abdominal pain, indigestion, diarrhoea, or constipation.
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Weekly across the two intervention menstrual cycles
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Gastrointestinal-Symptom-Free Weeks
時間枠：Weekly cross the two intervention menstrual cycles
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Between-group difference (HPLB vs placebo) in the number of gastrointestinal-symptom-free weeks, defined as a GSRS score of 1 in all five symptom categories: reflux, abdominal pain, indigestion, diarrhoea, and constipation.
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Weekly cross the two intervention menstrual cycles
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協力者と研究者
ここでは、この調査に関係する人々や組織を見つけることができます。
捜査官
- 主任研究者：Kelsie Johnson, PhD、Liverpool John Moores University
出版物と役立つリンク
研究に関する情報を入力する責任者は、自発的にこれらの出版物を提供します。これらは、研究に関連するあらゆるものに関するものである可能性があります。
一般刊行物
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研究記録日
これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。
主要日程の研究
研究開始 (実際)
2026年5月5日
一次修了 (推定)
2027年3月30日
研究の完了 (推定)
2027年5月30日
試験登録日
最初に提出
2026年4月22日
QC基準を満たした最初の提出物
2026年5月5日
最初の投稿 (実際)
2026年5月12日
学習記録の更新
投稿された最後の更新 (実際)
2026年6月2日
QC基準を満たした最後の更新が送信されました
2026年5月29日
最終確認日
2026年5月1日
詳しくは
本研究に関する用語
その他の研究ID番号
- 25/SPS/057_2026
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
はい
IPD プランの説明
De-identified individual participant data that underlie the results reported in this study will be made available upon reasonable request to the principal investigator following publication.
IPD 共有時間枠
Data will be available following publication for a period of up to 5 years.
IPD 共有アクセス基準
Data will be available to researchers who provide a methodologically sound proposal, subject to approval by the principal investigator.
Requests should be directed to the principal investigator.
IPD 共有サポート情報タイプ
- STUDY_PROTOCOL
- CSR
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
いいえ
米国FDA規制機器製品の研究
いいえ
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。