A Trial to Assess the Pharmacokinetics and Pharmacodynamics of a Novel Synbiotic Oral Supplement for Vaginal Health

A Randomized, Placebo-Controlled Trial to Assess the Pharmacokinetics and Pharmacodynamics of a Novel Synbiotic Oral Supplement for Vaginal Health

A randomized, placebo-controlled trial to assess the Pharmacokinetics and Pharmacodynamics of a novel synbiotic dietary supplement for vaginal health.

Study Overview

• Status: Active, not recruiting
• Conditions: Vaginal Health
• Intervention / Treatment: Dietary supplement: Vaginal Health Active VV-01; Dietary supplement: Vaginal Health Placebo Control

Detailed Description

This is a randomized, double-blind, placebo-controlled, decentralized clinical trial that will enroll approximately 200 healthy women aged 21-60 years old who meet all eligibility criteria. Eligible participants will be stratified based on key factors.

Following stratification, participants will be randomized to one of the study arms (placebo or VV-01 product) using block randomization. Participants will have a 1:1 chance of receiving the active study product or the placebo.

Participants will receive study kits containing the study product, administration supplies, biomarker self-collection materials, and comprehensive instructions for product use and sample collection.

The duration of the study for each participant will be approximately 2 weeks following enrollment.

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

Contacts and Locations

Study Locations

• United States
  • California
    • Del Mar, California, United States, 92014-2605
      • Radicle Science Inc.

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion criteria

Participants must meet all the following criteria:

• Healthy women with a vagina 21 - 60 years old at the time of electronic consent
• Sex assigned female at birth

• Eligible menstrual status:

  • Pre-menopausal is defined as women in their childbearing years who must have a regular menstrual cycle (consistently average cycle length of 21 to 35 days) Note: Women in their childbearing years who do not have a regular menstrual cycle due to a hormone-based intrauterine device are eligible
  • Peri-menopausal is defined as women who report irregular periods (differences in menstruation compared with their typical cycle in their 20s), with at least 1 period in the last 12 months AND report mild menopausal symptoms (e.g., vasomotor symptoms such as hot flashes, night sweats)
  • Post-menopausal is defined as women with an absence of menstrual cycle for the last 12 consecutive months or longer
• Willing to ingest an oral capsule during the study and be blinded to product identity (active or placebo)
• Willing to self-collect vaginal swabs and pH samples
• Willing to abstain from the use of intravaginal products during the study period (e.g., vaginal suppositories, vaginal moisturizers including hyaluronic acid, boric acid suppositories, pH balancing wipes, douching, vaginal creams/gels), as well as lubrication and spermicides
• Able to read and comprehend English and provide electronic informed consent
• Resides in the United States

Exclusion criteria

• Active vaginal, pelvic, or urogenital infection (e.g., UTI, BV, yeast infection)
• Chronic vulvar and vaginal conditions (e.g., vulvodynia, lichen sclerosis and lichen planus, desquamative inflammatory vaginitis)
• Unexplained vaginal bleeding

• Use of copper-based intrauterine devices

  • Note: Hormone-based intrauterine devices are permitted (e.g., Mirena®)
• For peri-menopausal and post-menopausal individuals, use of estrogen-based vaginal cream/gel or suppositories
• Women who have undergone surgical menopause (e.g., bilateral oophorectomy with or without hysterectomy)
• Current or recent use (< 3 months prior to enrollment) of antibiotics or antifungals, or anticipated use during study period (e.g., perioperative antibiotics for upcoming elective procedures)

• Current or recent use (<4 weeks prior to enrollment) of any other probiotic, prebiotic or synbiotic-containing products

  • Note: Individuals who undergo a washout of 4-weeks prior to enrollment and are willing to abstain from consuming such products during the study are permitted. Food-based probiotics, prebiotics, and synbiotics are permitted (e.g., kimchi, yoghurt, kefir, kombucha)
• Pregnant, breastfeeding, or actively trying to conceive during the study period.
• Allergy to any ingredients in the investigational or placebo product.
• Receiving chronic oral steroid therapy (excluding those for skin, eyes, nose, or inhaled) or have received such treatment within 4 weeks of enrollment
• Surgery, immunotherapy, chemotherapy, radiation, or biological cancer therapy within 4 weeks of enrollment and/or planned during the next 2 weeks
• Diagnosed and active serious medical condition requiring current treatment (e.g., cancer; autoimmune diseases [lupus, rheumatoid arthritis, Crohn's disease]; serious cardiac, liver, endocrine (insulin-dependent diabetes and/or on SGLT2 inhibitors such as Jardiance®/Empagliflozin, Farxiga®/Dapagliflozin) or kidney disease; psychiatric conditions / substance use disorders; chronic infections [HIV, Hepatitis B/C], any condition which in the investigator's opinion may jeopardize the individual's safety or interfere with the ability to comply with the study
• Participation in another clinical trial within 90 days of screening
• International travel during the study period

Study Plan

How is the study designed?

Design Details

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

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo Control; Vaginal Health Placebo Control	Dietary supplement: Vaginal Health Placebo Control; Vaginal Health Placebo Control Participants will orally ingest Vaginal Health Placebo Control once daily as directed for a period of 2 weeks
Active Comparator: Active VV-01; Vaginal Health Active VV-01	Dietary supplement: Vaginal Health Active VV-01; Product 1 Participants will orally ingest Vaginal Health Active Product 1 once daily as directed for a period of 2 weeks.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Colonization of VV-01 probiotic strains in the vagina	Colonization of VV-01 probiotic strains in the vagina assessed using strain-specific qPCR from vaginal swabs	Baseline to Day 14

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Vaginal microbial ecosystem structure	Structure of the vaginal microbiome assessed by metagenomic sequencing of vaginal swabs	Baseline to Day 14
Biogenic amines production capability in the vaginal microbiome	Biogenic amines production capability assessed by metagenomic sequencing (functional genomics) of vaginal swabs	Baseline to Day 14
Safety and tolerability	Safety and tolerability assessed through observation of serious adverse events	Baseline to Day 14

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Vaginal pH	pH measurements of vaginal fluid using pH strips	Baseline to Day 14

Collaborators and Investigators

• Sponsor: Radicle Science
• Investigators: Principal Investigator: Susan Hewlings, Radicle Science

Publications and helpful links

Helpful Links

• Related Info

Study record dates

Study Major Dates

• Study Start (Actual): February 26, 2026
• Primary Completion (Estimated): February 26, 2027
• Study Completion (Estimated): February 26, 2027

Study Registration Dates

• First Submitted: February 20, 2026
• First Submitted That Met QC Criteria: February 20, 2026
• First Posted (Actual): February 27, 2026

Study Record Updates

• Last Update Posted (Actual): April 22, 2026
• Last Update Submitted That Met QC Criteria: April 17, 2026
• Last Verified: February 1, 2026

More Information

Terms related to this study

• Other Study ID Numbers: RADX_C026_DSH

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO
• IPD Plan Description: Data will not be shared with researchers outside of Radicle Collaborators on this study.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No