Radicle Spark for Men 24: A Study of Health and Wellness Products on Sexual Health and Related Health Outcomes

Radicle Spark for Men™ 24: A Randomized, Double-Blind, Placebo-Controlled Direct-to-Consumer Study Assessing the Impact of Health and Wellness Products on Sexual Health and Related Health Outcomes

A randomized, double-blind, placebo-controlled study assessing the impact of health and wellness products on sexual health and related health outcomes

Study Overview

• Status: Completed
• Conditions: Sexual Function; Sexual Satisfaction
• Intervention / Treatment: Dietary supplement: Spark Placebo Control Form 1; Dietary supplement: Spark Active Study Product 1.1 Usage; Dietary supplement: Spark Placebo Control Form 2; Dietary supplement: Spark Active Study Product 2.1 Usage

Detailed Description

This is a randomized, double-blind, placebo-controlled study conducted with adult participants. residing in the United States.

Eligible participants will (1) endorse a desire for improved libido, sexual satisfaction and/or function, (2) have the opportunity for meaningful improvement (at least 30%) in their primary health outcome, and (3) express acceptance in taking a product and not knowing its formulation until the end of the study.

Participants that report a known cardiac dysfunction, liver or kidney disease may be excluded. Participants that report a known contraindication or with well-established, significant safety concerns due to illness will be excluded. Heavy drinkers will be excluded. Participants that report taking medications with a known contraindication or with well-established, significant safety concerns will be excluded

Self-reported data are collected electronically from eligible participants for 7 weeks. Participant reports of health indicators will be collected at baseline, throughout the active period of study product use, and in a final survey. All study assessments will be electronic; there are no in-person visits or assessments for this real-world evidence study.

• Study Type: Interventional
• Enrollment (Actual): 1202
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • California
    • Del Mar, California, United States, 92014
      • Radicle Science, Inc

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

• Adults, at least 21 years of age at the time of electronic consent, inclusive of all ethnicities, races, and gender identities: Assigned sex at birth is male
• Resides in the United States
• Endorses as improved libido (sex drive), sexual satisfaction and/or function as a primary desire
• Has the opportunity for at least 30% improvement in their primary health outcome
• Expresses a willingness to take a study product and not know the product identity (active or placebo) until the end of the study

Exclusion Criteria:

• Unable to provide a valid US shipping address and mobile phone number
• Reports current enrollment in another clinical trial
• Reports being a heavy drinker (defined as drinking 3 or more alcoholic beverages per day)
• Unable to read and understand English
• Reports a current and/or recent (up to 3 months ago) major illness and/or surgery that poses a known, significant safety risk
• Reports a diagnosis of cardiac dysfunction, liver or kidney disease that presents a known contraindication and/or a significant safety risk with any of the study product ingredients: NYHA (New York Heart Health) Class Ill or IV congestive heart failure, atrial fibrillation, uncontrolled arrhythmias, cirrhosis, end-stage liver disease, stage 3b or 4 chronic kidney disease, or kidney failure
• Reports taking medications that have a well-established moderate or severe interaction, posing a substantial safety risk with any of the study product ingredients. Anticoagulants, antihypertensives, anxiolytics, antidepressants, chemotherapy. immunotherapy, sedative hypnotics, seizure medications, medications that warn against grapefruit consumption, corticosteroids at doses greater than 5 mg per day, diabetic medications, oral anti-infectives (antibiotics, antifungals, antivirals) to treat an acute infection, antipsychotics, MAOls (monoamine oxidase inhibitors), or thyroid products
• Reports current use of the primary ingredient(s) and/or similar product(s) to the active study product(s) that may limit the effects of the study products
• Lack of reliable daily access to the internet

Study Plan

How is the study designed?

Design Details

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

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo Control 1; Spark Product Form 1 - control	Dietary supplement: Spark Placebo Control Form 1; Participants will use their Radicle Spark Placebo Control Form 1 as directed for a period of 6 weeks.
Experimental: Active Product 1.1; Spark Product Form 1 - active product 1	Dietary supplement: Spark Active Study Product 1.1 Usage; Participants will use their Radicle Spark Active Study Product 1.1 as directed for a period of 6 weeks.
Placebo Comparator: Placebo Control 2; Spark Product Form 2 - control	Dietary supplement: Spark Placebo Control Form 2; Participants will use their Radicle Spark Placebo Control Form 2 as directed for a period of 6 weeks.
Experimental: Active Product 2.1; Spark Product Form 2 - active product 1	Dietary supplement: Spark Active Study Product 2.1 Usage; Participants will use their Radicle Spark Active Study Product 2.1 as directed for a period of 6 weeks.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in sexual health	Difference between rates of change over time in sexual health score as assessed by Patient Reported Outcome Measurement System (PROMIS) Brief Profile Sexual Function and Satisfaction Survey [male version consists of 4 health domains assessed only among participants with sexual activity in the 30 days prior: erectile function (score range = 2-10; higher scores indicate better erectile function), orgasm ability (score range = 1-5; higher scores indicate more ability), orgasm pleasure (score range = 1-5; higher scores indicate more pleasure), satisfaction with sex life (score range = 2-10; higher scores indicate more satisfaction)]	6 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in feelings of stress	Mean difference in feelings of stress score as assessed by Perceived Stress Scale 4 (PSS-4) (scale 0-16; where lower scores correspond to less stress)	6 weeks
Change in fatigue	Mean difference in fatigue as assessed by Patient Reported Outcome Measurement System (PROMIS) Fatigue 4A (scale 4-20; where higher scores correspond to more severe fatigue)	6 weeks
Change in mood (emotional distress-depression)	Mean difference in mood score as assessed by PROMIS Emotional Distress- Depression 4A (scale 4-20; where higher scores correspond to more severe emotional distress-depression)	6 weeks
Minimal clinical importance difference (MCID) in feelings of stress	Likelihood of achieving a MCID in feelings of stress score as assessed by Perceived Stress Scale 4 (PSS-4) (scale 0-16; where lower scores correspond to less stress)	6 weeks
Minimal clinical importance difference (MCID) in fatigue	Likelihood of achieving a MCID in feelings of fatigue score as assessed by Patient Reported Outcome Measurement System (PROMIS) Fatigue 4A (scale 4-20; where higher scores correspond to more severe fatigue)	6 weeks
Minimal clinical importance difference (MCID) in mood (emotional distress-depression)	Likelihood of achieving a MCID in mood score as assessed by PROMIS Emotional Distress- Depression 4A (scale 4-20; where higher scores correspond to more severe emotional distress-depression)	6 weeks
Minimal clinical importance difference (MCID) in sexual health	Likelihood of achieving a MCID in sexual health score as assessed by Patient Reported Outcome Measurement System (PROMIS) Brief Profile Sexual Function and Satisfaction Survey [male version consists of 4 health domains assessed only among participants with sexual activity in the 30 days prior: erectile function (score range = 2-10; higher scores indicate better erectile function), orgasm ability (score range = 1-5; higher scores indicate more ability), orgasm pleasure (score range = 1-5; higher scores indicate more pleasure), satisfaction with sex life (score range = 2-10; higher scores indicate more satisfaction)]	6 weeks

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in saliva concentration of at-home (direct-to-consumer) specimen assay (2)	Mean difference in saliva concentration as assessed by saliva-based cytokines (Interleukin 1 beta, Interleukin 8, Tumor necrosis factor-alpha, and Interleukin 6) biomarker. (Optional; among consented participants only).	6 weeks
Change in saliva concentration of at-home (direct-to-consumer) specimen assay (3)	Mean difference in saliva concentration as assessed by saliva-based dehydroepiandrosterone sulfate (DHEA-S) biomarker. (Optional; among consented participants only).	6 weeks
Change in saliva concentration of at-home (direct-to-consumer) specimen assay (4)	Mean difference in saliva concentration as assessed by saliva-based estradiol biomarker. (Optional; among consented participants only).	6 weeks
Change in saliva concentration of at-home (direct-to-consumer) specimen assay (5)	Mean difference in saliva concentration as assessed by saliva-based progesterone biomarker. (Optional; among consented participants only).	6 weeks
Change in saliva concentration of at-home (direct-to-consumer) specimen assay (6)	Mean difference in saliva concentration as assessed by saliva-based testosterone biomarker. (Optional; among consented participants only).	6 weeks
Change in saliva concentration of at-home (direct-to-consumer) specimen assay (7)	Mean difference in saliva concentration as assessed by saliva-based cortisol biomarker. (Optional; among consented participants only).	6 weeks
Change in saliva concentration of at-home (direct-to-consumer) specimen assay (8)	Mean difference in saliva concentration as assessed by saliva-based melatonin biomarker. (Optional; among consented participants only).	6 weeks
Change in saliva concentration of at-home (direct-to-consumer) specimen assay (9)	Mean difference in saliva concentration as assessed by saliva-based C-Reactive Protein (CRP) biomarker. (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (1)	Mean difference in blood concentration as assessed by blood-based cortisol biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (2)	Mean difference in blood concentration as assessed by blood-based homocysteine biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (3)	Mean difference in blood concentration as assessed by blood-based ferritin biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (4)	Mean difference in blood concentration as assessed by blood-based thyroid stimulating hormone (TSH) biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (5)	Mean difference in blood concentration as assessed by blood-based hemoglobin A1C (HbA1c) biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (6)	Mean difference in blood concentration as assessed by blood-based insulin biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (7)	Mean difference in blood concentration as assessed by blood-based vitamin D biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (10)	Mean difference in blood concentration as assessed by blood-based estradiol biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in stool concentration of at-home (direct-to-consumer) specimen assay	Mean difference in stool concentration as assessed by a stool sample (microbial diversity) (Optional; among consented participants only).	6 weeks
Change in saliva concentration of at-home (direct-to-consumer) specimen assay (1)	Mean difference in saliva concentration as assessed by saliva-based IgG (Immunoglobulin) biomarker (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (8)	Mean difference in blood concentration as assessed by blood-based dehydroepiandrosterone sulfate (DHEA-S) biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (9)	Mean difference in blood concentration as assessed by blood-based testosterone biomarker (1 drop) (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (11)	Mean difference in blood concentration as assessed by blood-based total cholesterol (high-density lipoproteins (HDL) and low-density lipoproteins (LDL)) biomarker (1 drop). (Optional; among consented participants only).	6 weeks
Change in blood concentration of at-home (direct-to-consumer) specimen assay (12)	Mean difference in blood concentration as assessed by blood-based triglycerides (apolipoprotein A1 (ApoA1) and apolipoprotein B (ApoB)) (1 drop). (Optional; among consented participants only).	6 weeks

Collaborators and Investigators

• Sponsor: Radicle Science
• Investigators: Principal Investigator: Emily K. Pauli, PharmD, Radicle Science

Publications and helpful links

Helpful Links

• Radicle Science, Inc

Study record dates

Study Major Dates

• Study Start (Actual): October 7, 2024
• Primary Completion (Actual): January 1, 2025
• Study Completion (Actual): January 1, 2025

Study Registration Dates

• First Submitted: August 23, 2024
• First Submitted That Met QC Criteria: September 5, 2024
• First Posted (Actual): September 19, 2024

Study Record Updates

• Last Update Posted (Actual): November 28, 2025
• Last Update Submitted That Met QC Criteria: November 23, 2025
• Last Verified: November 1, 2024

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Behavior; Sexual Behavior; Orgasm
• Other Study ID Numbers: RADX-P-2413

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
• product manufactured in and exported from the U.S.: No