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PrediabetesFAMNCT07624500

Food and Metabolism Study

A study testing Avocado meal plan in people with Prediabetes and Insulin Resistance, run by Clinical Nutrition Research Center, Illinois Institute of Technology at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

In this study, Investigators are interested in looking at the influence of eating avocados regularly, which are rich in healthy fats, fibers, and unique carbohydrates, on triglyceride and glucose metabolism in people with prediabetes and insulin resistance. Read more about this study

Who is it for?
Ages 40 to 70 yearsHealthy volunteers can take part
Conditions the study is for
Prediabetes, Insulin Resistance, Triglycerides
What is being tested?
Avocado meal plan
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
82 participants
Where
1 siteUnited States
Study dates
3 Jun 2026to 31 Dec 2027
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 40 to 70 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Men or women, 40-70 years of age.
  • Fasting triglycerides (TG) >115 mg/dL.
  • Insulin resistance as measured by Homeostatic Model Assessment for Insulin Resistance (HOMA-IR) >2.5.
  • Able to provide informed consent.
  • Able to comply with and perform the procedures requested by the protocol, specifically eat all the meals and snacks provided by the study which will be almost all your food (~ 80% of calories per day).
  • Able to come to the clinic up to 6 times during the study.
  • Able to maintain usual physical activity pattern.
  • Able to avoid/abstain from alcohol and vigorous physical activity for 24 hours prior to and during study visit.

Who cannot join

  • Men and women with known or suspected intolerance, allergies or hypersensitivity to study foods or interventions.
  • Fasting blood sugar ≥125 mg/dL. Men and women with blood pressure >160 mmHg (systolic) / 100 mmHg (diastolic) at the screening visit.
  • Men and women with history of diabetes cardiovascular events, respiratory, renal, gastrointestinal, hepatic or eye disease or surgery- within a year.
  • Men and women who have or had cancer other than non-melanoma skin cancer in the past 5 years.
  • Men and women taking over the counter or prescription medications or dietary supplements that may interfere with study procedures or endpoints.
  • Men and women who are on a specialized diet (vegan, vegetarian, keto, etc.). - - Men and women who consume nuts or peanuts daily or most days of the week.
Show all 16Show fewer
  • Men and women who are not weight stable (+/-10lbs in previous 2 months). Men and women who have excessive use of drugs or alcohol (ie., addictions) within the past 2 years.
  • Men and women with documented physical or mental disease/condition, which might limit participation in or completion of the study or, that, in the opinion of the investigator, could interfere with the interpretation of the study results.
  • Women who are known to be pregnant or who are intending to become pregnant over the course of the study.
  • Women who are lactating.
  • Major trauma or a surgical event within 2 months (or longer depending on trauma or event) and after consultation with PI. Has used antibiotics within the previous 2 months.
  • History of an eating disorder (e.g., anorexia nervosa, bulimia nervosa, or binge eating) diagnosed by a health professional.
  • Excessive coffee and tea consumers (> 4 cups/d).
  • Donated blood within the last 3 months.
  • Women who are taking an unstable dose and brand of hormonal contraceptives and/or a stable dose and brand for less than 6 months.
  • Unusual working hours (working overnight).

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Chelsea Preiss, MS contact

312-567-5300

cpreiss@illinoistech.edu

Indika Edirisinghe, PhD contact

708-563-8178

iedirisi@illinoistech.edu

United States1 site, 1 recruiting
  • Clinical Nutrition Research Center at IIT

    Chicago, Illinois, 60616

    Recruiting

Other trials in United States

About this study

Official title: Effects of Avocado on Triglyceride Metabolism in Individuals With Insulin Resistance

In this study, Investigators are interested in looking at the influence of eating avocados regularly, which are rich in healthy fats, fibers, and unique carbohydrates, on triglyceride and glucose metabolism in people with prediabetes and insulin resistance.

Read the detailed description

The proposed study will be conducted in humans according to Good Clinical Practice (GCP) guidelines. All subjects will review and sign an Informed Consent Form approved by the Illinois Institute of Technology's Institutional Review Boards (IRB) prior to screening. The research is designed as a randomized, 2-arm, parallel, diet-controlled, human clinical trial to investigate the effects of avocado consumption for 4 weeks on triglyceride metabolism in individuals with insulin resistance.

Participants will be asked to do the items described below. Visits will be held at the Clinical Nutrition Research Center (CNRC) on the Illinois Tech Campus, 10 W. 35th St., Suite 3D6-1 Chicago, IL, 60616.

SCREENING VISIT

Eligibility for the study is based on the above list (inclusion and exclusion criteria). Investigators will determine if participants qualify for the study at the Screening Visit by the following measurements:

  • General measurements: height, weight, body composition, waist circumference, blood pressure, vitals and body temperature
  • Fasting blood glucose (sugar) from a finger prick
  • Venous blood collection to assess blood glucose, insulin, and triglycerides
  • Pregnancy test, for women under the age of 60

Demographic questionnaire, health and medication questionnaire: participants will be asked to provide personal information, such as their name, date of birth, race, etc. Investigators will also ask them to answer questions about their demographics, health, medical history, and the medications they are taking. Based on the results of the blood draw, questionnaires, measurements, and evaluation of their health, they may meet the criteria and be invited to participate in the study.

PRE-STUDY / PRE-INTERVENTION VISIT (which may be performed on the same or a different day as the screening visit) The Pre-Study visit lasts ~45 minutes to 1 hour and participants will meet with one of our investigators who will provide detailed instructions on procedures of the study and "how to prepare for each of participants study days." They will be trained in all study procedures, including, but not limited to, foods to avoid during the study, medications/supplements to avoid, food diary recording, gastrointestinal diary recording and fasting overnight. Their study dates will be scheduled, and they will be provided with a study booklet, including a study calendar and all instructions covered at the Pre-Study Visit.

Medications/Supplements: If they are taking any medications or supplements that do not interfere with the study or have been OK'd by study staff, they will take those as instructed by their doctor and will record them in their diary. Investigators will train the participants on what foods or supplements are OK and NOT OK during the study at the Pre-Study Visit.

Self-Characteristics and Dietary Surveys: Participants will be asked to complete online surveys that cover usual gastrointestinal symptoms and a 24-hour food recall (https://asa24.nih.gov/).

STUDY DAY VISITS Study Visit 1 / Day 0 and Visit 5 / Day 28 Procedures

Staff collects study materials from the participant

  1. Diary and provide 24 h recall (https://asa24.nih.gov/) Confirmation participant is ready to go for their study day by interview/discussion with the study staff
  2. Fasted overnight for 10-12 hours, including finger prick to verify usual fasting glucose
  3. Had a usual night of sleep (5-6 hours minimum)
  4. Avoided alcohol and vigorous physical activity 24 hours before the study day

After confirming they are ready for their study day, Investigators will proceed to an exam room to measure:

Anthropometrics: Investigators will measure weight, waist circumference and body composition.

Vital signs: Investigators will check their blood pressure, heart rate, and body temperature using standard clinic devices.

Once Investigators have collected measurements, they will proceed with an IV catheter to collect blood over multiple timepoints.

Blood collection: Participants will see the Licensed Health Care Provider (LHCP) for blood sample collection. Investigators will use an indwelling catheter (IV). This means Investigators will use a needle to put a thin tube in their arm or hand, from which Investigators can get blood samples while keeping them as comfortable as possible. This tube will stay in their arm until all blood drawings are completed during their visit. If there is difficulty with blood flow Investigators will ask the participant if they're comfortable with single stick blood collection, performed by LHCP using a butterfly needle. There will be nine blood draws in total over 5 hours.

Once the fasting blood draw is collected, Investigators will provide the participant with a breakfast in the form of a nutritionally complete liquid meal test (LMT).

Standard Liquid Meal Test (LMT): For this test, they will drink about 2 cups of vanilla flavored Ensure®. Ensure® is a nutritional supplement containing a mixture of sugars, fats, and protein and a variety of vitamins and minerals. The drink contains milk protein (suitable for lactose intolerance) and soy products. Investigators will ask if they are unwilling to consume any ingredients in the Ensure® drink. It may be unsafe for them to complete this test if they have an allergy to any of the components. The total amount participant will drink will be approximately 440 calories, 64g of Carbs, 12g of Fat, and 18g of Protein.

After all blood samples have been collected they will be provided with meals to last until V2 (~ 1 week) and instructed how to fill out the dietary adherence log.

MEAL PICKUP VISITS Study Visit 2 / Day 7, Study Visit 3 / Day 14, Study Visit 4 / Day 21

Participants will not need to come fasted for meal pickup visits. Investigators will collect materials and ensure they are complying with the study protocols, and assess if there are any difficulties Investigators can help with. The following will be done at pickup visits:

Staff collects study materials from the participant 1. Diary and provide 24 h recall (https://asa24.nih.gov/) Staff collects weight and LDN does counseling as needed

  1. Licensed Dietitian Nutritionist (LDN) will review compliance diary and weight changes and provide nutrition counseling as needed
Being tested
Avocado meal plan, Control meal plan
Keywords
Triglycerides, Insulin resistance, Glucose metabolism, Lipids metabolism
Medical subject headings
Prediabetic State, Insulin Resistance

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Avocado meal planOther

    American Diet with avocado

  • Control meal planOther

    American diet

Study groups in NCT07624500
Study groupRoleWhat they receive
Avocado meal planActive comparator2 meals and snack per day including one avocado in the meal, covering 80% of daily calories need.
Receives: Other: Avocado meal plan
Control meal planPlacebo comparator2 meals and snacks per day without the inclusion of avocado, covering 80% of daily calories needs.
Receives: Other: Control meal plan

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Changes in serum biomarker: triglycerides

    analyzed by McLendon labs

    Measured: baseline and 4 weeks

Secondary outcomes (16)
  1. Changes in serum biomarker: insulin

    analyzed by McLendon labs

    Measured: baseline and 4 weeks

  2. Changes in serum biomarker: glucose

    analyzed by McLendon labs

    Measured: baseline and 4 weeks

  3. Changes in Homeostatic Model Assessment of Insulin Resistance (HOMA-IR)

    Calculated from fasting glucose and insulin

    Measured: baseline and 4 weeks

  4. Changes in Muscle Insulin Sensitivity Index (MISI)

    calculated using postprandial glucose and insulin concentrations measured by Randox clinical analyzer

    Measured: baseline and 4 weeks

  5. Changes in total cholesterol

    fasting state, analyzed by Labcorp

    Measured: baseline and 4 weeks

  6. Changes in Low-Density Lipoprotein (LDL) cholesterol

    fasting state, analyzed by Labcorp

    Measured: baseline and 4 weeks

  7. Changes in High-Density Lipoprotein (HDL) cholesterol

    fasting state, analyzed by Labcorp

    Measured: baseline and 4 weeks

  8. Changes in non-High-Density Lipoprotein (HDL) cholesterol

    fasting state, analyzed by Labcorp

    Measured: baseline and 4 weeks

  9. Changes in Connecting Peptide (C-peptide)

    analyzed by McLendon labs

    Measured: baseline and 4 weeks

  10. Changes in free fatty acids

    analyzed by Quest Diagnostics Lab

    Measured: baseline and 4 weeks

  11. Changes in Glucagon-Like Peptide-1(GLP-1)

    analyzed by Luminex multi-target analyzer

    Measured: baseline and 4 weeks

  12. Fructosamine

    analyzed by Randox clinical analyzer

    Measured: baseline and 4 weeks

  13. Inflammation markers-Interleukin (IL)-6

    Analyzed by Luminex method

    Measured: Baseline

  14. Inflammation markers-Interleukin (IL)-10

    Analyzed by Luminex method

    Measured: Baseline

  15. Inflammation markers-Tumor necrosis factor alpha (TNF-α)

    Analyzed by Luminex method

    Measured: Baseline

  16. Nuclear Magnetic Resonance (NMR) Lipoprotein Subfraction

    Analyzed by Labcorp

    Measured: Baseline

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted3 Jun 2026
  2. Study start3 Jun 2026
  3. Primary completion28 Jun 2027 (estimated)
  4. Study completion31 Dec 2027 (estimated)

Resources

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
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Participant
Enrolment
82 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07624500
Sponsor's protocol ID
IRB-2026-34
Acronym
FAM
Status last verified
Jun 2026
First submitted
28 May 2026
Last updated
1 Jul 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: We would make all de-identified IPD collected during the trial (i.e., the study outcomes) publicly available upon request.

Questions about this trial

What is this clinical trial studying?

A study testing Avocado meal plan in people with Prediabetes and Insulin Resistance, run by Clinical Nutrition Research Center, Illinois Institute of Technology 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 8 inclusion and 16 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: looking for participants now, as of the sponsor's last update on 1 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?

Contact Chelsea Preiss, MS (312-567-5300, cpreiss@illinoistech.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Changes in serum biomarker: triglycerides (time frame: baseline and 4 weeks). 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 1 Jul 2026.

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Food and Metabolism Study (NCT07624500) | AzTrials