Recruiting

Avocados

Sponsor:

Pennington Biomedical Research Center

Code:

NCT05958368

Conditions

Diabetes Mellitus, Type 2

Insulin

Fructosamine

C-Reactive Protein

Glucose

Eligibility Criteria

Sex: All

Age: 18 - 65

Healthy Volunteers: Accepted

Interventions

Avocado

Other Fruit(s)

Study Details

Brief summary:

The objective of this study is to assess the effects of Hass Avocados on glycemic control. The investigators hypothesize that Hass Avocado consumption will reduce fasting blood sugar compared to an isocaloric amount of other fruit during controlled feeding.

Conditions

Diabetes Mellitus, Type 2

Insulin

Fructosamine

C-Reactive Protein

Glucose

Study ID

NCT05958368

Start date

Oct 10, 2023

Status verified date

Jul, 2025

Completion date

Dec 15, 2026

Anticipated

Primary completion date

May 30, 2026

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 65

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Participant reported diagnosis of Type 2 diabetes
  • HbA1c between 5.7%-11% (inclusive) and / or fasting blood glucose of ≥ 100 mg/dL
  • BMI 27-50 kg/m2 (inclusive)
  • Age range - 18 - 65 years (inclusive)
  • On stable regimen of all medications (including diabetes) for at least 3 months (brief regimens of medications such as antibiotics, steroids, etc. are permitted)
  • Willing to follow all requirements of study protocol including blood draws
  • Under the care of a physician who will be responsible for managing the subject's diabetes
  • Willing to give release to provide their treating MD with information about the trial

Exclusion Criteria:

  • Not willing or unable to consume study foods including avocados
  • Participation in a weight control program within the past 3 months or weight loss of ≥ 5 kg in the previous 3 months
  • Taking prescription or OTC weight loss medications within last 4 weeks
  • History of a surgical procedure for weight loss in last 5 years (e.g. gastroplasty, gastric by-pass, gastrectomy or partial gastrectomy, adjustable banding, gastric sleeve)
  • History of major surgery within three months of enrollment
  • Type 1 diabetes, insulin dependent type 2 diabetes, thiazolidinediones (including rosiglitazone and pioglitazone)
  • Renal insufficiency consisting of potassium over 5.5 (mmol/L) on a non-hemolyzed specimen, or a creatinine over 2.5 mg/dL
  • Bilirubin over 3 (mg/dL) or an albumin less than 3 (g/dL)
  • ALT > 3 (IU/L) times the upper limit of normal (normal range is 7-56)
  • Evidence of more than 1 severe hypoglycemic event (episode requiring emergency medical services) in the past 12 months, unless the participant's treating physician provides written clearance for participation.
  • Those on higher doses of diuretics (furosemide 40mg or higher or comparable)
  • Unstable heart disease (an ongoing workup or treatment for a cardiac symptom such as unstable angina, coronary ischemia)
  • Presence of implanted cardiac defibrillator
  • Blood pressure ≥180/100 mm Hg. If a potential participant has a BP above the inclusion criteria it is acceptable to re-test this potential participant within one week of the original test.
  • Thyroid disease for which the participant is untreated or has had treatment changed within the last 6 months. History of thyroid disease or current thyroid disease treated with a stable medication regimen for at least 6 months is acceptable
  • Uncontrolled gastrointestinal disorders including chronic malabsorptive conditions, peptic ulcer disease, Crohn's disease, chronic diarrhea, or active gallbladder disease
  • Current cancer or cancer treatment, or a history of cancer or cancer treatment within the last 3 years. Persons with successfully resected non-melanoma carcinoma of the skin may be enrolled.
  • Dementia, psychiatric illness, or substance abuse that may interfere with adherence (e.g., illness that is currently unstable or resistant to first-line therapy; substance abuse in the past year)
  • Women who are pregnant, lactating, trying to become pregnant or unwilling to use an effective means of birth control
  • Currently consuming >14 alcoholic drinks (1 drink = 12 fl oz beer, 4 fl oz wine or 1.5 fl oz liquor) per week and unwilling to stop intake during study participation
  • Participation in another clinical trial within 30 days prior to enrollment
  • Any other condition or factor which in the opinion of the study physician or investigator makes it inadvisable for the candidate to participate in the trial

Study Design

Enrollment

48 participants

Anticipated

Allocation

Randomized

Intervention Model

Crossover

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Avocado

Participants will consume 1 Hass avocado a day.

active comparator: Other Fruit(s)

Participants in the other fruit arm will receive other fruits.

Interventions

Avocado

The Hass Avocado group will consume 7 avocados a week (1 / day; \~240 kcals/d).

Other Fruit(s)

The other fruits group will consume fruit(s) matched to the avocado in energy and form (i.e., solid fruit).

Primary outcome measure

  • Fasting Blood Glucose [ Time Frame: Week 5 - Week 0 ]

Central Contacts and Locations

Central contacts

John W Apolzan, PhD

2257632827John.Apolzan@pbrc.edu

Rob Leonard

2257630948doctors@pbrc.edu

Locations

Pennington Biomedical Research Center

Recruiting

Baton Rouge, Louisiana, United States, 70808

Contacts

John W Apolzan, PhD

225-763-2827john.apolzan@pbrc.edu

More Information

Sponsor

Pennington Biomedical Research Center

Last update posted

Jul 31, 2025

Last verified

Jul, 2025

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Pennington Biomedical Research Center on 2025-07-31.