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Bean study aims to unlock better mineral absorption

NCT ID NCT06327529

Knowledge-focused Sponsor: University of California, Davis Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at how well the body absorbs zinc and iron from four types of common beans that have different levels of natural compounds called phytate and polyphenols. Fifteen healthy young women will eat each bean variety in a random order, and researchers will measure mineral absorption from blood samples. The goal is to learn which bean types might offer better nutrition.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Common beans (Phaseolus vulgaris) with varying phytate and polyphenol levels
What this could lead to
If successful, this could help identify bean varieties that provide more zinc and iron, potentially improving nutrition for populations that rely on beans as a staple food.
What could go wrong
This is a small, early-stage study with only 15 participants, so results may not apply broadly. It measures absorption in a lab setting, not long-term health outcomes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 15 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2024

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

19 to 24 years

Sex

Female participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Healthy eumenorrheic (regular monthly menstrual cycles of 25-30-days in length) * BMI 18.5 - 30 kg/m2 * Regular consumer of beans, i.e. ≥ 4 servings per month * Usual iron intake estimated by Food Frequency Questionnaire to be less than the Recommended Daily Allowance (RDA) of 18 mg/d (8) * Subject is willing and able to comply with the study protocols. * Subject is willing to participate in all study procedures. Exclusion Criteria: * Dislike or allergy to beans * Self-reported current or recent pregnancy (within the past 12 months) * Self-reported recent termination of pregnancy (3 months if abortion in 1st or 2nd trimester, or 12 months if in 3rd trimester) * Self-reported plans to become pregnant during the study period * Self-reported cancer * Self-reported surgery without the past 12 months * Currently taking prescription drugs, other than for contraception, or any nutritional supplements * Any daily iron supplementation within the past 12 months. * Currently breastfeeding * Any medical conditions affecting iron or zinc metabolism (such as hemochromatosis or sickle cell disease)

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Iron absorption Zinc absorption

How to take part

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  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

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Contacts and locations

Locations

  • Department of Nutrition

    RECRUITING

    Davis, California, 95616, United States

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