Clinical trial Recruiting at 1 site Interventional Ages 18 to 35 Women only

Protein boost during the luteal phase to help protect muscle

Official title: Protein Supplementation During Luteal Phase

Run by Sam Houston State University · NCT07843095 · Data updated 2026-11-12

This study tests whether increasing daily protein intake by 12% during the luteal phase can help prevent muscle breakdown in premenopausal women aged 18–35.

Quick facts

Study typeInterventional
Ages18 Years to 35 Years
SexWomen only
Enrollment34 (estimated)
SponsorSam Houston State University
Academic / other
Locations2 sites (Conroe, Texas and 1 other locations)
StatusRecruiting
StartedAugust 4, 2026
Main results expectedDecember 17, 2026
Study endsJanuary 29, 2027
Registry record updatedSeptember 25, 2026
Trial IDNCT07843095 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are healthy, eumenorrheic women aged 18–35 with regular cycles.

Probably not a fit

Individuals with irregular cycles, hormonal contraceptive use, or conditions affecting muscle metabolism may not benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Researchers will compare protein supplementation to placebo over about four months in women with regular menstrual cycles. The aim is to see if a higher protein intake during the luteal phase reduces markers of muscle protein breakdown. The study design uses two groups and focuses on real-world dietary changes during the luteal phase of the menstrual cycle. Findings could inform dietary guidance for preserving skeletal muscle in at-risk populations.

Why it matters

Potential benefit: If successful, participants and others could benefit from guidelines that help preserve skeletal muscle during the luteal phase.

How similar studies have gone: There is limited prior human research directly testing protein supplementation specifically during the luteal phase, making this a relatively novel approach.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Eumenorrheic
* 18 to 35 years old

Exclusion Criteria:

* Pregnant or lactating (These individuals will not have a regular menstrual cycle) in the previous six months
* Vegetarian (protein supplementation is from animal origin)
* Contraceptive use, any hormone based contraceptive use for 6 months prior to enrollment
* Use of illicit drugs in previous 6 months.
* Non-tobacco user
* Gasterointestinal disorders, liver disease, infectious disease, cardiovascular, pulmonary, renal, immune, metabolic, cancer
* Medications: corticosteroids, chronic NSAIDS, high strength acne, testosterone
* Diagonsed PCOS, endometrosis, ovarian insufficency, or other menstrual cycle disorder.

Where it's running

  • SHSU College of Osteopathic Medicine
    Conroe, Texas, United States
    Recruiting
  • SHSU Physician's Clinic
    Conroe, Texas, United States
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.