Avocado a day may keep cellular aging at bay for breast cancer survivors
NCT ID NCT07097155
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tests whether eating one avocado daily for 4 months can slow biological aging in 120 female breast cancer survivors. The researchers will measure changes in telomere length (a marker of cellular aging) and other health indicators like inflammation and heart disease risk. Participants will either eat an avocado each day or follow their usual diet with fewer than two avocados per week.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- avocado
- What this could lead to
- If it works, this could point toward a simple dietary change to help breast cancer survivors age more slowly and reduce long-term health risks.
- What could go wrong
- This is a small, early-phase trial (120 people) testing a biomarker, not a direct health outcome. Results may not lead to a proven treatment or apply to everyone.
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 120 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2026
- Expected to finish
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Aug 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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40 to 65 years
- Sex
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Female participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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: * Women diagnosed with primary breast cancer in stages I, II or III; * 40-65 years old at screening; * Cancer treatment (radiotherapy and chemotherapy) completed ≥ 6 months but not more than 10 years at the time of recruitment; * Currently consuming less than 2 avocados per week; * Signed the informed consent letter. Exclusion Criteria: * Metastasis; * Ductal carcinoma or lobular carcinoma in situ; * Breast cancer recurrence; * Cancer diagnosis other than breast cancer or non-melanoma skin cancer; * Body mass index ≥40kg/m2; * Currently pregnant or breastfeeding, or planning pregnancy in the following 6 months; * Allergy to latex; * Unwilling to consume avocado; * Immunodeficiency or HIV-positive status; * Alcohol abuse (\>50g/day); * Unstable use of plant sterols, mineral supplements, use of fibre supplements, fish oil, or antioxidants in the 4 weeks prior to enrolment, or plans to change this during the study; * Currently participating in any other randomized controlled trial; * Difficulty or impossibility of an adequate follow-up; * Inability or unwillingness to give written informed consent or to communicate with study personnel, or illiteracy; * Patients with an acute infection or inflammation (e.g., pneumonia) will be allowed to participate in the study 3 months after recovery.
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Conditions
The condition(s) this trial relates to.
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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Unit for Public Health and Nutritional Epidemiology, Faculty of Medicine and Health Sciences, Universitat Rovira i Virgili
RECRUITINGReus, Tarragona, 43201, Spain
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