Health BehaviorNCT02163928
Evaluation of Changes in Skin Carotenoid Scores in Medical Students Following Dietary Interventions
An observational study of Health Behavior, run by Texas Tech University Health Sciences Center at 1 site in United States.
Trial summary
Skin Carotenoid Scores (SCS) are a biomarker of overall antioxidant status. This study will use Raman Spectroscopy to examine the ability of increased dietary intake of fruits and vegetables to increase SCS in medical students. Read more about this study
- Who is it for?
- Ages 18 to 89 yearsHealthy volunteers can take part
- Conditions the study is for
- Health Behavior
- What is being tested?
- Food-based intervention; increased fruits and vegetables
- How many people
- 40 participants
- Where
- 1 siteUnited States
- Study dates
- Jun 2014to 14 Dec 2016
- Phase
- Observational
- Are there results?
- None posted in the registry
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 89 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Medical students from Texas Tech University School of Medicine.
Who may be able to join
- Medical student from any year at Texas Tech University School of Medicine willing to maintain the increased consumption of fruits and vegetables for the entire eight-week experimental period, to maintain logs and to report at each of the times that measurements will be taken.
Who cannot join
- Pregnancy
- Smoker
- BMI =/> 30
- Chronic disease such as diabetes, heart disease, or metabolic disorder
Trial locations and contacts
1 site in 1 country.
United States1 site
Texas Tech University Health Sciences Center
Lubbock, Texas, 79430
About this study
Skin Carotenoid Scores (SCS) are a biomarker of overall antioxidant status. This study will use Raman Spectroscopy to examine the ability of increased dietary intake of fruits and vegetables to increase SCS in medical students. This will be an observational, non-invasive study examining skin carotenoid levels over time in individuals who have increased their intake by dietary adjustments. Thirty medical students meeting study inclusion criteria will be asked to increase their intake of high antioxidant fruits and vegetables to 4-6 cups per day over an eight week period of time. Students will self-select their fruits and vegetables from a given list and will receive supermarket gift cards to offset the cost of the increased food. Students will be asked to follow their usual diet for one week. Then increase their intake of high antioxidant fruit and vegetable to 4-6 cups per day for eight weeks. Then return to their usual diet for 2 weeks. SCS scores will be taken at baseline and week 1. At the beginning of week 2, students will be asked to increase fruit and vegetable intake to 4-6 cups per day. SCS will be measured every two weeks during the 8-week intervention phase. Students will return to their usual diet for 2 weeks and SCS will be measured at the end of that 2-week period.
Read the detailed description
Inclusion criteria:
- Medical students (any year) from Texas Tech School of Medicine
- BMI between 20-29
- Non-smoker, non-pregnant
Exclusion criteria:
- Individuals suffering from a chronic disease such as diabetes, heart disease, or other metabolic disorder
- Pregnant women
- Smokers
- Individuals with BMI > or = 30 or < or = 19
- Conditions
- Health Behavior
- Being tested
- Food-based intervention; increased fruits and vegetables
- Keywords
- Antioxidants, Carotenoids, Diet
- Medical subject headings
- Health Behavior
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Food-based intervention; increased fruits and vegetablesOther
Also called Whole-diet intervention
4-6 cups of fruits and vegetables daily for 8-weeks
What is being measured
The primary outcome is the main question the study is designed to answer.
Skin Carotenoid Scores (SCS)
Skin Carotenoid Scores (SCS) are a biomarker of overall antioxidant status. The purpose of this study is to measure changes in SCS in medical students when fruit and vegetable consumption is increased. SCS will measured using a Bio-photonic Scanner. This scanner non-invasively measures carotenoid levels in the skin using optical signals. By placing the palm of the hand in front of a low-energy blue light for less than two minutes, the scanner can determine the SCS.
Measured: Baseline, 2,4,6,8,10,12 weeks
Secondary outcomes (1)
Body weight
Weight will be measured on a calibrated balance scale. Subjects will remove shoes, keys, cellphones, or other objects from their person before being weighed.
Measured: Baseline, 2,4,6,8,10,12 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Jun 2014 (estimated)
- Study startJun 2014
- Primary completion14 Dec 2016
- Study completion14 Dec 2016
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (5)Papers the sponsor has linked to this study.
- Other trials for Health BehaviorStudies of the same condition, open and under way.
- 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
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 40 participants (actual)
Sponsor and investigators
- Lead sponsor
- Texas Tech University Health Sciences Center
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Kathy Chauncey, PhD, RDN, Principal investigator, Texas Tech University Health Sciences Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02163928
- Sponsor's protocol ID
- L14-128
- Other IDs
- CRI14-042 Skin Carotenoids
- Status last verified
- Jan 2020
- First submitted
- 12 Jun 2014
- Last updated
- 5 Feb 2020
- Results posted
- No
- Data monitoring committee
- No
Publications
Ermakov IV, Ermakova MR, McClane RW, Gellermann W. Resonance Raman detection of carotenoid antioxidants in living human tissues. Opt Lett. 2001 Aug 1;26(15):1179-81. doi: 10.1364/ol.26.001179.
PubMed 18049555Ermakov IV, Gellermann W. Validation model for Raman based skin carotenoid detection. Arch Biochem Biophys. 2010 Dec 1;504(1):40-9. doi: 10.1016/j.abb.2010.07.023. Epub 2010 Aug 1.
PubMed 20678465Mayne ST, Cartmel B, Scarmo S, Lin H, Leffell DJ, Welch E, Ermakov I, Bhosale P, Bernstein PS, Gellermann W. Noninvasive assessment of dermal carotenoids as a biomarker of fruit and vegetable intake. Am J Clin Nutr. 2010 Oct;92(4):794-800. doi: 10.3945/ajcn.2010.29707. Epub 2010 Aug 4.
PubMed 20685953Mayne ST, Cartmel B, Scarmo S, Jahns L, Ermakov IV, Gellermann W. Resonance Raman spectroscopic evaluation of skin carotenoids as a biomarker of carotenoid status for human studies. Arch Biochem Biophys. 2013 Nov 15;539(2):163-70. doi: 10.1016/j.abb.2013.06.007. Epub 2013 Jun 30.
PubMed 23823930Meinke MC, Darvin ME, Vollert H, Lademann J. Bioavailability of natural carotenoids in human skin compared to blood. Eur J Pharm Biopharm. 2010 Oct;76(2):269-74. doi: 10.1016/j.ejpb.2010.06.004. Epub 2010 Jun 15.
PubMed 20558286
Study at a glance
From the registry record, last updated by the sponsor on 5 Feb 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of Changes in Skin Carotenoid Scores in Medical Students Following Dietary Interventions
- ClinicalTrials.gov ID
- NCT02163928
- Acronym / sponsor ID
- L14-128
- Conditions
- Health Behavior
- Keywords
- Antioxidants, Carotenoids, Diet
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 40 participants (actual)
- Lead sponsor
- Texas Tech University Health Sciences CenterUniversity, hospital or other
- Study start
- Jun 2014 (actual)
- Primary completion
- 14 Dec 2016 (actual)
- Study completion
- 14 Dec 2016 (actual)
- First posted
- 16 Jun 2014 (estimated)
- 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.
Skin Carotenoid Scores (SCS) are a biomarker of overall antioxidant status. This study will use Raman Spectroscopy to examine the ability of increased dietary intake of fruits and vegetables to increase SCS in medical students. This will be an observational, non-invasive study examining skin carotenoid levels over time in individuals who have increased their intake by dietary adjustments. Thirty medical students meeting study inclusion criteria will be asked to increase their intake of high antioxidant fruits and vegetables to 4-6 cups per day over an eight week period of time. Students will self-select their fruits and vegetables from a given list and will receive supermarket gift cards to offset the cost of the increased food. Students will be asked to follow their usual diet for one week. Then increase their intake of high antioxidant fruit and vegetable to 4-6 cups per day for eight weeks. Then return to their usual diet for 2 weeks. SCS scores will be taken at baseline and week 1. At the beginning of week 2, students will be asked to increase fruit and vegetable intake to 4-6 cups per day. SCS will be measured every two weeks during the 8-week intervention phase. Students will return to their usual diet for 2 weeks and SCS will be measured at the end of that 2-week period.
Detailed description
Inclusion criteria:
- Medical students (any year) from Texas Tech School of Medicine
- BMI between 20-29
- Non-smoker, non-pregnant
Exclusion criteria:
- Individuals suffering from a chronic disease such as diabetes, heart disease, or other metabolic disorder
- Pregnant women
- Smokers
- Individuals with BMI > or = 30 or < or = 19
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 to 89 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Medical students from Texas Tech University School of Medicine.
Key inclusion criteria (1 listed)
- Medical student from any year at Texas Tech University School of Medicine willing to maintain the increased consumption of fruits and vegetables for the entire eight-week experimental period, to maintain logs and to report at each of the times that measurements will be taken.
Key exclusion criteria (4 listed)
- Pregnancy
- Smoker
- BMI =/> 30
- Chronic disease such as diabetes, heart disease, or metabolic disorder
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 |
|---|---|---|
| Food-based intervention; increased fruits and vegetablesAlso: Whole-diet intervention4-6 cups of fruits and vegetables daily for 8-weeks | Other | – |
Primary outcome
Skin Carotenoid Scores (SCS)
Time frame: Baseline, 2,4,6,8,10,12 weeks
Skin Carotenoid Scores (SCS) are a biomarker of overall antioxidant status. The purpose of this study is to measure changes in SCS in medical students when fruit and vegetable consumption is increased. SCS will measured using a Bio-photonic Scanner. This scanner non-invasively measures carotenoid levels in the skin using optical signals. By placing the palm of the hand in front of a low-energy blue light for less than two minutes, the scanner can determine the SCS.
1 secondary outcome
Body weight
Time frame: Baseline, 2,4,6,8,10,12 weeks
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 5 Feb 2020.
- Background: PubMed 18049555Ermakov IV, Ermakova MR, McClane RW, Gellermann W. Resonance Raman detection of carotenoid antioxidants in living human tissues. Opt Lett. 2001 Aug 1;26(15):1179-81. doi: 10.1364/ol.26.001179.
- Background: PubMed 20678465Ermakov IV, Gellermann W. Validation model for Raman based skin carotenoid detection. Arch Biochem Biophys. 2010 Dec 1;504(1):40-9. doi: 10.1016/j.abb.2010.07.023. Epub 2010 Aug 1.
- Background: PubMed 20685953Mayne ST, Cartmel B, Scarmo S, Lin H, Leffell DJ, Welch E, Ermakov I, Bhosale P, Bernstein PS, Gellermann W. Noninvasive assessment of dermal carotenoids as a biomarker of fruit and vegetable intake. Am J Clin Nutr. 2010 Oct;92(4):794-800. doi: 10.3945/ajcn.2010.29707. Epub 2010 Aug 4.
- Background: PubMed 23823930Mayne ST, Cartmel B, Scarmo S, Jahns L, Ermakov IV, Gellermann W. Resonance Raman spectroscopic evaluation of skin carotenoids as a biomarker of carotenoid status for human studies. Arch Biochem Biophys. 2013 Nov 15;539(2):163-70. doi: 10.1016/j.abb.2013.06.007. Epub 2013 Jun 30.
- Background: PubMed 20558286Meinke MC, Darvin ME, Vollert H, Lademann J. Bioavailability of natural carotenoids in human skin compared to blood. Eur J Pharm Biopharm. 2010 Oct;76(2):269-74. doi: 10.1016/j.ejpb.2010.06.004. Epub 2010 Jun 15.
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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.
Kathy Chauncey, PhD, RDN principal investigator
Texas Tech University Health Sciences Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Health Behavior, run by Texas Tech University Health Sciences Center 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 1 inclusion and 4 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: finished, as of the sponsor's last update on 5 Feb 2020. 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. 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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
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?
Skin Carotenoid Scores (SCS) (time frame: Baseline, 2,4,6,8,10,12 weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02163928, which also lists 5 linked publications.
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 5 Feb 2020.