MedTrace Logo

Acute Vitamin D Supplementation on Testosterone in Females

NCT06610968 · Status: ACTIVE_NOT_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2026-03-25

No results posted yet for this study

Summary

Participation will take place over two visits to the Clinical Exercise Research Center (CERC) at the University of Southern California Health Sciences Campus.

On the first visit, height, weight, and body composition by bioelectrical impedance are recorded. Questionnaires and withdrawal of a sample of blood (1 tablespoon) are also completed. The intervention begins the day following the first visit. The intervention protocol consists of three weeks of consuming either a placebo capsule or a 5000 IU Vitamin D capsule daily and completing a daily survey.

The second visit to CERC immediately follows the 3-weeks intervention. In this visit, the same blood sampling protocol will be completed. The assignment of the intervention will be randomized (i.e., rolling a die), and participants are blinded to group assignment.

Conditions

  • Female Hormone Profile

Interventions

DIETARY_SUPPLEMENT

Vitamin D (Cholecalciferol )

5000 IU Vitamin D (as cholecalciferol) capsules (Vitamin D3 125 mcg \[5,000 IU\], Pure Encapsulation, LLC) daily

DIETARY_SUPPLEMENT

Placebo Group

One placebo capsule (Zeebo Imagine, Zeebo) daily.

Sponsors & Collaborators

  • University of Southern California

    lead OTHER

Principal Investigators

  • Giuliet L Kibler · University of Southern California - Division of Biokinesiology and Physical Therapy

Study Design

Allocation
RANDOMIZED
Purpose
HEALTH_SERVICES_RESEARCH
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
35 Years
Sex
FEMALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-07-01
Primary Completion
2026-03-05
Completion
2026-09-30

Countries

  • United States

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06610968 on ClinicalTrials.gov