CarotenoidsNCT07606001
Yellow Potatoes and Carotenoids
A study testing Yellow-flesh potatoes and White-flesh potatoes in people with Carotenoids, run by University of Florida at 1 site in United States.
Trial summary
This study will assess the effects of daily intake of yellow and white potatoes on plasma lutein and zeaxanthin concentrations. Skin carotenoid levels will be assessed using the Veggie Meter. Read more about this study
- Who is it for?
- Ages 18 to 80 yearsHealthy volunteers can take part
- Conditions the study is for
- Carotenoids
- What is being tested?
- Yellow-flesh potatoes and White-flesh potatoes
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 30 participants
- Where
- 1 siteUnited States
- Study dates
- 28 May 2026to 15 Dec 2026
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 80 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Adults ≥ 18 years of age
- Able to provide written consent in English
- Baseline Veggie Meter score of ≤ 300
- Willing to adhere to study procedures
Who cannot join
- Baseline Veggie Meter score of >300
- Potato allergy
- Previously or currently being treated for intestinal disease, including irritable bowel syndrome, Crohn's disease, ulcerative colitis, celiac disease, or gastrointestinal cancer
- Previous gastrointestinal surgery (e.g., gastric bypass, fundoplication, bowel resection)
- Current cancer treatment
- Current pregnancy; Vegetarian diet
- Elite athletes or long-distance runners
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effects of Yellow Flesh Potatoes on Carotenoid Status
This study will assess the effects of daily intake of yellow and white potatoes on plasma lutein and zeaxanthin concentrations. Skin carotenoid levels will be assessed using the Veggie Meter.
- Conditions
- Carotenoids
- Being tested
- Yellow-flesh potatoes, White-flesh potatoes
- Keywords
- lutein, zeaxanthin, carotenoid, potatoes
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Yellow-flesh potatoesOther
Participants will consume 250 g daily of yellow-flesh potatoes.
White-flesh potatoesOther
Participants will consume 250 g daily of white-flesh potatoes.
| Study group | Role | What they receive |
|---|---|---|
| Yellow-flesh potatoes | Experimental | 250 g of yellow-flesh potatoes Receives: Other: Yellow-flesh potatoes |
| White-flesh potatoes | Placebo comparator | 250 g of white-flesh potatoes Receives: Other: White-flesh potatoes |
What is being measured
The primary outcome is the main question the study is designed to answer.
Plasma zeaxanthin
Plasma concentration of zeaxanthin
Measured: 28 days
Secondary outcomes (2)
Plasma lutein
Plasma concentration of lutein
Measured: 28 days
Skin carotenoid content
Skin carotenoid content by reflection spectroscopy
Measured: 28 days
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 May 2026
- Study start28 May 2026
- Primary completion31 Aug 2026 (estimated)
- Study completion15 Dec 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for CarotenoidsStudies of the same condition, open and under way.
- More trials run by University of FloridaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 30 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University of Florida
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07606001
- Sponsor's protocol ID
- IRB202600662
- Status last verified
- May 2026
- First submitted
- 18 May 2026
- Last updated
- 20 Jul 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Study at a glance
From the registry record, last updated by the sponsor on 20 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Yellow Flesh Potatoes on Carotenoid Status
- ClinicalTrials.gov ID
- NCT07606001
- Acronym / sponsor ID
- IRB202600662
- Conditions
- Carotenoids
- Keywords
- lutein, zeaxanthin, carotenoid, potatoes
- Study type
- Interventional
- Recruitment status
- Active, not recruiting
- Enrolment
- 30 participants (estimated)
- Lead sponsor
- University of FloridaUniversity, hospital or other
- Study start
- 28 May 2026 (actual)
- Primary completion
- 31 Aug 2026 (estimated)
- Study completion
- 15 Dec 2026 (estimated)
- First posted
- 26 May 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will assess the effects of daily intake of yellow and white potatoes on plasma lutein and zeaxanthin concentrations. Skin carotenoid levels will be assessed using the Veggie Meter.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Yellow-flesh potatoes | Experimental | Other: Yellow-flesh potatoes250 g of yellow-flesh potatoes |
| White-flesh potatoes | Placebo comparator | Other: White-flesh potatoes250 g of white-flesh potatoes |
Who may qualify
- Ages
- 18 to 80 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Adults ≥ 18 years of age
- Able to provide written consent in English
- Baseline Veggie Meter score of ≤ 300
- Willing to adhere to study procedures
Key exclusion criteria (7 listed)
- Baseline Veggie Meter score of >300
- Potato allergy
- Previously or currently being treated for intestinal disease, including irritable bowel syndrome, Crohn's disease, ulcerative colitis, celiac disease, or gastrointestinal cancer
- Previous gastrointestinal surgery (e.g., gastric bypass, fundoplication, bowel resection)
- Current cancer treatment
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Yellow-flesh potatoesParticipants will consume 250 g daily of yellow-flesh potatoes. | Other | Yellow-flesh potatoes |
| White-flesh potatoesParticipants will consume 250 g daily of white-flesh potatoes. | Other | White-flesh potatoes |
Primary outcome
Plasma zeaxanthin
Time frame: 28 days
Plasma concentration of zeaxanthin
2 secondary outcomes
Plasma lutein
Time frame: 28 days
Skin carotenoid content
Time frame: 28 days
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Jul 2026.
- Individual participant dataSharing planned: Undecided
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Bite Sized Biomarkers
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Yellow-flesh potatoes and White-flesh potatoes in people with Carotenoids, run by University of Florida at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: under way, not looking for participants, as of the sponsor's last update on 20 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Plasma zeaxanthin (time frame: 28 days). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Jul 2026.