Gastrointestinal and Fluid Retention Symptoms Associated With Creatine Monohydrate With and Without Loading Dose Over 28 Days of Supplementation

NCT07176325 | Completed

• 1 other identifier: VIRUSE1R
• Study Type: observational
• Target: 24
• Locations: 1 country
• Sites: 1

Brief Summary

This study aimed to investigate the incidence and severity of GI symptoms associated with daily CM supplementation, with and without a loading phase, in healthy male and female adults.

Conditions

Side Effects of Creatine Monohydrate Dosing

Keywords

creatine monohydrate, gastrointestinal symptoms, supplementation, dosing regimen, tolerability, compliance, loading dose

Outcome Measures

Primary Outcomes (1)

• Gastrointestinal distress

  Gastrointestinal effects are well known, particularly at higher doses.

  28 days

Study Arms (2)

Group A (5 g/day CM)

No Loading Group

Other: Creatine Monohydrate

Group B (20 g/day loading dose for 14 days followed by 5 g/day maintenance)

Loading Group

Other: Creatine Monohydrate

Interventions

Creatine Monohydrate OTHER

Creatine Monohydrate was dosed based on industry recommendations, with and without a loading dose

Group A (5 g/day CM); Group B (20 g/day loading dose for 14 days followed by 5 g/day maintenance)

Eligibility Criteria

• Age: 18 Years - 60 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Probability Sample

Study Population

healthy male and females ages 18-60

You may qualify if:

• ○ Subjects must be healthy males or females, aged 18 to 60 inclusive at the time of screening.
• Subjects must be able to understand the study, agree to the requirements and restrictions, and be willing to give voluntary consent to participate in the study.
• Subjects are willing to have up to two (2) blood collections, one at Visit 2 and Visit 3.
• Subjects are willing to provide a urine sample that is collected over 24 hours. This entails collecting all urine in a 24-hour period in a container.
• Subject is willing to fast for 12 hours before the Baseline visit (second visit). Water is permitted.
• Subject is willing to have waist measurements taken with calipers and willing to wear clothing that allows easy access to their waist.
• Female subjects of childbearing potential must agree to one of the following methods of birth control through the duration of the study. Acceptable methods include: abstinence, same-sex partner, double barrier (condom, diaphragm, or cervical cap with spermicidal foam, gel, or cream); intra-uterine device (IUD) with or without hormones in place or hormonal contraception (oral, injectable, implantable, transdermal, or vaginal) used consecutively for at least 3 month prior to screening visit; vasectomized partner or bilateral insertion of Essure® implants (or analogous) for at least 6 months prior to the screening visit; to be considered a female of non- childbearing potential, subject must have had a bilateral tubal ligation, hysterectomy or bilateral oophorectomy; or postmenopausal status with amenorrhea (no menstruation) for at least 1 year prior to the screening visit.
• Subject is willing to comply with the study restrictions.
• Subjects is willing to maintain their current exercise regimen and their current diet while on the study.

You may not qualify if:

• ○ Subjects who are participating in another Clinical Trial.
• Subjects who faint during blood collection, or who have a phobia of needles, or a phobia of blood.
• Subjects who are weightlifters.
• Females who are pregnant or lactating (verbal confirmation only).
• Subject who has taken any creatine supplements in the last 30 days.
• Subjects with history of cancer (except localized skin cancer without metastases) within 5 years prior to the screening visit.
• Subject has diabetes (insulin dependent or not) or any immune deficiency disease such as HIV/AIDS, etc.
• Subject has any medical condition whether treating with mediation or not including hypertension (high blood pressure), hepatitis, any kidney disease or disorders, or musculoskeletal disorders. Note: if there are any significantly abnormal results for the BUN/creatinine screening labs the subject will be dropped.
• Subject is taking a medication that would preclude participation in the study per the Principal Investigator.
• Subjects with recent or current medical condition that may significantly impact the subject or the validity of the study results in the opinion of the Investigator.
• Subjects who have a known or suspected allergy or sensitivity to creatine.
• Chronic use of NSAIDs (e.g., Ibuprofen, Advil), or use of NSAIDs at one-week prior to each study visit.

Sponsors & Collaborators

• Vireo Systems, Inc.: lead

Study Sites (1)

Princeton Consumer Research

Raritan, New Jersey, 08869, United States

Location

MeSH Terms

Conditions

Patient Compliance

Interventions

Creatine

Condition Hierarchy (Ancestors)

Patient Acceptance of Health Care; Treatment Adherence and Compliance; Health Behavior; Behavior

Intervention Hierarchy (Ancestors)

Guanidines; Amidines; Organic Chemicals; Amino Acids; Amino Acids, Peptides, and Proteins

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: September 8, 2025
• First Posted: September 16, 2025
• Study Start: May 30, 2024
• Primary Completion: July 3, 2024
• Study Completion: July 3, 2024
• Last Updated: September 16, 2025

Record last verified: 2025-09

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)