Determining leucine needs during the menstrual cycle

Leucine Requirements During Different Phases of the Menstrual Cycle in Eumenorrheic Women

Not applicable Interventional University of British Columbia · NCT06533501

This study is testing how much leucine, an important nutrient, healthy women aged 20-35 need during different parts of their menstrual cycle to see how it affects their health and protein use.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment15 (estimated)
Ages20 Years to 35 Years
SexFemale
SponsorUniversity of British Columbia Academic / other
Locations1 site (Vancouver, British Columbia)
Trial IDNCT06533501 on ClinicalTrials.gov

What this trial studies

This study investigates the dietary leucine requirements for healthy women aged 20-35 during different phases of their menstrual cycle. Using a non-invasive method that includes pre-determined diets and breath collection, the study aims to establish how leucine intake affects protein synthesis and overall health. A minimum of 15 participants will be recruited to assess their leucine needs across various intake levels during the follicular and luteal phases. The findings could help refine dietary guidelines specifically for women, addressing the inadequacies of current recommendations based on male physiology.

Who should consider this trial

Good fit: Ideal candidates are healthy women aged 20-35 with regular menstrual cycles and a BMI between 18 and 28.

Not a fit: Patients using hormonal birth control or those with abnormal menstrual cycles or certain health conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to more accurate dietary guidelines for women, improving their health and nutritional outcomes.

How similar studies have performed: While this approach is innovative, previous studies have successfully used similar methods to investigate amino acid requirements in women, suggesting potential for success.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* People with menstrual cycles
* Between the ages of 20 to 35y
* Regular menstrual cycle (21-35 day cycle) for the past 12 months
* Body mass index (BMI) of between 18 and 28 kg/m2
* Free from pre-existing health conditions

Exclusion Criteria:

* People who are currently using hormonal birth control or any contraceptive that would affect sex hormones
* People on hormone therapy
* People with an abnormal menstrual cycle history
* People with non-traditional dietary practices
* Recent weight loss/weight gain
* People with a history of endocrine disorders
* People who are pregnant
* People who are breastfeeding
* People who have given birth in the last 18 months
* People who depend on medication that affects normal metabolism. Any medication that alters normal body metabolism would skew the results and compromise the validity of the data set.
* People with a metabolic, neurological, genetic, or immune disorder likely to affect nutritional requirements or overall body metabolism.

Where this trial is running

Vancouver, British Columbia

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Menstrual Cycle
Last reviewed 2026-06-09 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.