Randomized, Double-Blind Placebo-Controlled Trial to Assess Overall User Experience of a Synbiotic Vaginal Suppository

A Randomized, Double-Blind Placebo-Controlled Trial to Assess The Overall User Experience of a Synbiotic Vaginal Suppository

The purpose of this study is to assess the impact of a personal care product on vaginal health in individuals with a self-reported history of vaginal discomforts such as malodor, bothersome discharge, itching, irritation, and dryness. The personal care product, VH-01 contains a prebiotic and three distinct strains of Lactobacillus crispatus, a microbe commonly found in healthy vaginal microbiomes. The study will be a randomized, placebo-controlled trial where the test product will be compared to a placebo in a 2:1 manner. Participants will be asked to complete online questionnaires and provide vaginal samples to assess microbial communities.

The aims of this study are to assess:

1. The user experience and acceptability of VH-01 vaginal suppository vs. placebo.
2. Attitudes and perceptions of VH-01 vaginal suppository usage vs. placebo.
3. Health-related quality of life during the use of VH-01 vaginal suppository vs. placebo.
4. Changes in self-perceived vaginal discomforts during the use of VH-01 vaginal suppository vs. placebo.

Study Overview

• Status: Completed
• Conditions: Vaginal Personal Care
• Intervention / Treatment: Other: Placebo vaginal suppository tablet; Other: VH-01 vaginal suppository tablet

Detailed Description

The vaginal microbiome is a community of microorganisms that live inside of the vagina. Studies have shown that vaginal microbiomes can be classified into one of five community state types (CSTs) known as: CST I, II, III, IV, and V. CSTs are determined based on the taxonomic composition of the vaginal microbiome. CST I, dominated by Lactobacillus crispatus, is considered optimal and is significantly associated with vaginal health.

Lactobacillus crispatus produces lactic acid and other compounds that maintain an optimal vaginal pH, which discourages the growth of harmful microbes that lead to disruptions in the vaginal microbial ecosystem. These disruptions may increase vaginal discomforts such as vaginal malodor, discharge, itching, irritation, and dryness.

VH-01 is a multi-strain vaginal synbiotic designed to seed and sustain an optimal and protective CST I vaginal ecology. The product delivers an ecology of complimentary Lactobacillus crispatus and synbiotic ingredients to promote an optimal vaginal ecology. The strains were selected to confer maximal vaginal microbiome stability in response to potential perturbations such as menstruation, sex, exercise, medication and other environmental influences.

The purpose of this study is to determine whether vaginal health can be influenced by a novel personal care product comprised of a prebiotic, and multiple strains of Lactobacillus crispatus associated with a stable vaginal microbiome.

• Study Type: Interventional
• Enrollment (Actual): 200
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • California
    • Santa Monica, California, United States, 90404
      • Citruslabs

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Individuals with a vagina 18 - 55 years old at time of electronic consent
• Sex assigned female at birth
• Self-reported history of any of the following vaginal discomforts occurring recently and regularly, including but not limited to: Vaginal malodor, Bothersome vaginal discharge, Vaginal itching, Vaginal irritation, Vaginal dryness
• Willing to use an intra-vaginal suppository during the study and not knowing the product identity (active or placebo)
• Willing to complete questionnaires, which include questions related to vaginal health and sexual history/behavior
• Able to read and comprehend English and provide written informed consent
• Have reliable access to the internet

Exclusion Criteria:

• In menopause or experiencing menopausal symptoms
• History of irregular menses; defined as less than 25 day or more than 35 day cycle or length of time between cycles varies by more than 9 days
• Planned insertion or replacement of IUD in next 3 months (if applicable)
• Active pelvic or vaginal infection (i.e., active urinary tract infection, active bacterial vaginosis, active yeast infection). NOTE: Eligible to re-screen 4 weeks after completion of treatment for an active infection.
• Current or anticipated oral or vaginal antibiotic/antifungal treatment in the next 3 months (e.g., preoperative antibiotics for upcoming elective procedure). NOTE: Eligible to re-screen 4-weeks after completion of treatment
• Unwilling to discontinue the use of specified intra-vaginal products during the study including the following: vaginal probiotic suppositories, vaginal moisturizers, boric acid suppositories, pH balancing wipes, intravaginal gel, external vaginal itch relief cream, odor control sprays, vaginal steam products, vaginal cleansing douche, feminine/vaginal cleanser, vaginal preventive deodorant, gel/cream treatments for feminine odor
• Orally administered probiotics for vaginal health. NOTE: Oral probiotics for non-vaginal conditions (e.g., gastrointestinal health) are permitted. Eligible to re-screen 1-week after discontinuing orally administered probiotics for vaginal health
• Pregnant, breastfeeding or trying to conceive during the course of the study
• Active abnormal uterine/vaginal bleeding
• Receiving chronic oral steroid therapy (excluding those for skin, eyes, nose, or inhaled) or have received such therapy within 4 weeks of screening
• Surgery, immunotherapy, chemotherapy, radiation or biological cancer therapy within 30 days of enrollment and/or planned during the next 3 months
• Allergy to any components of the supporting or excipient ingredients in test formulation tablets/placebo
• Active serious medical condition requiring current treatment including but not limited to: Cancer, Autoimmune diseases (lupus, rheumatoid arthritis, Crohn's disease), Chronic infections (e.g., HIV, Hepatitis B, Hepatitis C), Serious cardiac, liver, or kidney disease, Psychiatric conditions/substance use disorders,
• Any condition which in the investigator's opinion may jeopardize the individual's safety or interfere with the ability to comply with the study
• Lives in the state of Alaska, Louisiana, New Jersey or New York

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo vaginal suppository tablet; Participants will be instructed to take the placebo vaginal suppository tablet as directed. The placebo vaginal suppositories do not contain active ingredients and are identical in appearance to the active product.	Other: Placebo vaginal suppository tablet; Participants will be instructed to take the placebo on Days 1, 4, 7, 14, and 21 of Month 1 and Days 1 and 14 of Months 2 and 3.
Experimental: VH-01 vaginal suppository tablet; Participants will be instructed to take VH-01 vaginal suppository tablet (active product) as directed.	Other: VH-01 vaginal suppository tablet; Participants will be instructed to take VH-01 Days 1, 4, 7, 14, and 21 of Month 1 and Days 1 and 14 of Months 2 and 3.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To evaluate user experience of VH-01 vaginal suppository vs. placebo.	Self-reported rate of product acceptance to support vaginal health through month 3.	From enrollment through three complete menstrual cycles or approximately 3 months.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To evaluate attitudes and perceptions of VH-01 vaginal suppository usage vs. placebo.	Self-reported change in perception of vaginal state through month 3 [5-point Likert scale].	From enrollment through three complete menstrual cycles or approximately 3 months.
To evaluate health-related quality of life during the use of VH-01 vaginal suppository vs. placebo.	Self-reported change in vaginal health-related quality of life through month 3 [5-point Likert scale].	From enrollment through three complete menstrual cycles or approximately 3 months.

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
To evaluate changes in self-perceived vaginal discomforts during the use of VH-01 vaginal suppository vs. placebo.	Self-reported change in specific vaginal discomforts through month 3 [10-point linear scale].	From enrollment through three complete menstrual cycles or approximately 3 months.

Collaborators and Investigators

• Sponsor: Seed Health
• Investigators: Study Director: Dirk Gevers, PhD

Study record dates

Study Major Dates

• Study Start (Actual): January 29, 2024
• Primary Completion (Actual): July 31, 2024
• Study Completion (Actual): July 31, 2024

Study Registration Dates

• First Submitted: January 24, 2024
• First Submitted That Met QC Criteria: January 24, 2024
• First Posted (Actual): February 1, 2024

Study Record Updates

• Last Update Posted (Actual): May 31, 2025
• Last Update Submitted That Met QC Criteria: May 27, 2025
• Last Verified: May 1, 2025

More Information

Terms related to this study

• Keywords: vaginal dryness; vaginal discharge; Lactobacillus crispatus; vaginal itching; vaginal malodor; vaginal irritation
• Other Study ID Numbers: 20260

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No