Tiny citrus fruit tested for blood sugar benefits
NCT ID NCT07587905
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times
Summary
This study is testing whether taking calamansi (a small citrus fruit) powder capsules for 12 weeks can change blood glucose and insulin levels in healthy young adults aged 18-30. Fifty-four participants will be randomly assigned to receive either calamansi capsules or a placebo. Researchers will measure blood sugar, insulin, and other health markers at the start, after a single dose, and after 12 weeks of daily supplementation.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Calamansi (Citrus x macrocarpa) powder capsule
- What this could lead to
- If it works, this could point toward a natural supplement that helps manage blood sugar levels in healthy people.
- What could go wrong
- This is a small, early-stage study in healthy volunteers only, so results may not apply to people with diabetes or other conditions. The effect may be small or nonexistent.
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
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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
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About 54 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2026
- Expected to finish
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Jan 2027
An estimate. End dates often move.
- Lead sponsor
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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
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18 to 30 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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 individuals who have not been diagnosed with diabetes or prediabetes, with a fasting blood glucose level (after 8 hours of fasting) of less than 100 mg/dL. * Aged between 18-30 years, both male and female * Body Mass Index (BMI) between 18.5 and 22.9 kg/m² * No diseases affecting blood sugar levels, such as liver or pancreatic diseases Exclusion Criteria: * Pregnant or breastfeeding women * Regular smokers * Regular alcohol consumers * Individuals with a history of allergies to citrus fruits or citrus-derived ingredients * Individuals taking medications that affect glucose metabolism and fat distribution in the body, including steroids, protease inhibitors, and psychiatric medications. These refer to drugs that act on the central nervous system and may affect blood sugar levels or energy metabolism, such as antidepressants, antipsychotics, and mood stabilizers.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Piyapong Prasertsri
RECRUITINGMueang, Burapha University, 20131, Thailand