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Cardiovascular Risk FactorMACNCT03801837

Effect of Macadamia Nut on Cardiometabolic Risk Factors

A study testing Macadamia Nut in people with Cardiovascular Risk Factor and Heart Diseases, run by Loma Linda University at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This research study will test the effects of macadamia nuts on adiposity, and traditional and emergent risk factors of cardiometabolic disease in adult men and women Read more about this study

Who is it for?
Ages 40 to 75 yearsHealthy volunteers can take part
What is being tested?
Macadamia Nut
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
38 participants
Where
1 siteUnited States
Study dates
24 Jun 2019to 25 Nov 2019
Phase
Interventional
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 40 to 75 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Healthy men and post-menopausal women
  • Overweight (BMI 25-<40)
  • Waist circumference ≥88.9 cm for women and ≥101.6 cm for men
  • At least one of the following within the past year:
  • Plasma triglycerides ≥150mg/dl
  • Blood Pressure ≥130/85 mmHg or participants taking Antihypertensive medication
  • Fasting glucose ≥100 mg/dL
  • Low Density Lipoproteins>= 130 mg/dl

Who cannot join

  • Nut allergy, any
  • Significant chronic disease including: diabetes, congestive heart failure, renal failure, cirrhosis, or autoimmune disease
  • Medications affecting lipid or glucose metabolism, immune modulators, or antibiotics in the last 6 months
  • Mega-doses of lipid-lowering dietary supplements in the last 6 months
  • Cancer in the last 10 years (with the exception on non-melanoma skin cancer)
  • Pregnancy or lactation
Show all 9Show fewer
  • Weight change of >10% of body weight in the last 3 months.
  • Tobacco use
  • Claustrophobia (may affect BOD POD testing)

Trial locations and contacts

1 site in 1 country.

United States1 site
  • Loma Linda University School of Public Health

    Loma Linda, California, 92350

Other trials in United States

About this study

Official title: Macadamia Nut Effects on Adiposity and Cardiometabolic Risk Factors

This research study will test the effects of macadamia nuts on adiposity, and traditional and emergent risk factors of cardiometabolic disease in adult men and women

Read the detailed description

Purpose of this study is to investigate the effects of Macadamia nuts on body weight, adiposity, , oxidative stress, glucose, insulin an lipid levels. it will a randomized cross over study that will include two study diets (Macadamia nut diet and control diet) with a wash out period of 4 weeks in between. 40 subjects will be selected and randomized into either of the two phases. During the Macadamia nut diet phase subjects will be provided the appropriate portion of Macadamia nuts (15% of daily calories or 30-45 grams based on kcal requirement of the individual, instructions will be provided on how to incorporate nuts into the diet. this phase will last for 8 weeks. During the control diet phase, subjects will continue with their normal diet and abstain from eating nuts. subjects will be tested for various outcomes at baseline and twice at the end of each phase. The intervention will last for 5 months in total.

Being tested
Macadamia Nut, Control Diet
Keywords
Macadamia Nuts, Cardiovascular Disease, Inflammation
Medical subject headings
Heart Diseases, Inflammation, Cardiovascular Diseases

What participants receive

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

  • Macadamia NutDietary supplement

    Participants will be provided with the appropriate portion of macadamia nuts [15% of daily calories or 30-45 grams based on kcal requirement of the individual]

  • Control DietDietary supplement

    Participants will continue with their Habitual Diet during this part of the intervention

Study groups in NCT03801837
Study groupRoleWhat they receive
Macadamia Nut DietActive comparatorThis group will have their habitual diet supplemented with appropriate portion of Macadamia Nuts (15% of daily calories or 30-45 grams based on Kcal requirement of the individual)
Receives: Dietary Supplement: Macadamia Nut
Control DietPlacebo comparatorThis group will continue with their Habitual Diet
Receives: Dietary Supplement: Control Diet

What is being measured

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

  1. change in body weight

    The objective of this measure is to see if eating macadamia nuts could reduce body weight. An In body machine will be used to identify this by measuring the weight of the participants at the baseline and at the end of each diet phase. The weight will be measured in Kilograms

    Measured: baseline to 18 weeks

  2. change in body adiposity

    The objective of this measure is to see if eating Macadamia Nuts could reduce percentage body fat. Air Displacement Plethysmography will be used to determine any change in body percentage fat at the baseline and end of each diet phase

    Measured: baseline to 18 weeks

  3. change in body fat mass

    The objective of this measure is to see if eating Macadamia nuts could change body fat mass at the baseline and end of each diet phase using In Body device (InBody570, Seoul, Korea) that utilizes bioelectric impedance method.

    Measured: baseline to 18 weeks

  4. change in body percentage fat

    The objective of this measure is to see if eating Macadamia nuts could change body percentage fat at the baseline and end of each diet phase using In Body device (InBody570, Seoul, Korea) that utilizes bioelectric impedance method.

    Measured: baseline to 18 weeks

  5. change in total body water

    The objective of this measure is to see if eating Macadamia nuts could change total body water at the baseline and end of each diet phase using In Body device (InBody570, Seoul, Korea) that utilizes bioelectric impedance method.

    Measured: baseline to 18 weeks

  6. change in skeletal muscle mass

    The objective of this measure is to see if eating Macadamia nuts could change skeletal muscle mass at the baseline and end of each diet phase using In Body device (InBody570, Seoul, Korea) that utilizes bioelectric impedance method.

    Measured: baseline to 18 weeks

  7. change in lean body mass

    The objective of this measure is to see if eating Macadamia nuts could change lean body mass at the baseline and end of each diet phase using In Body device (InBody570, Seoul, Korea) that utilizes bioelectric impedance method.

    Measured: baseline to 18 weeks

  8. change in dry lean mass

    The objective of this measure is to see if eating Macadamia nuts could change dry lean mass at the baseline and end of each diet phase using In Body device (InBody570, Seoul, Korea) that utilizes bioelectric impedance method.

    Measured: baseline to 18 weeks

  9. change in fasting plasma cholesterol (mg/dl)

    change in fasting plasma cholesterol (mg/dl) will be measured by an enzymatic method with the use of a single aqueous reagent

    Measured: baseline to 18 weeks

  10. change in fasting plasma low density lipoprotein cholesterol (mg/dl)

    change in fasting plasma low density lipoprotein cholesterol (mg/dl) will be estimated by the use of a two reagent calorimetric enzymatic homogeneous system on the AU480 clinical chemistry analyzer

    Measured: baseline to 18 weeks

  11. change in fasting plasma high density lipoprotein cholesterol (mg/dl)

    change in fasting plasma high density lipoprotein cholesterol (mg/dl) will be measured by a two-phase reaction with calorimetric end point detection

    Measured: baseline to 18 weeks

  12. change in fasting plasma triglycerides(mg/dl)

    change in fasting plasma triglycerides(mg/dl) will be measured by an enzymatic hydrolysis method

    Measured: baseline to 18 weeks

  13. change in serum apolipoprotein B (mg/dl)

    change in serum apolipoprotein B (mg/dl) will be measured by an immuno-turbidimetric procedure using AU480 clinical chemistry analyser

    Measured: baseline to 18 weeks

  14. change in serum apolipoprotein A1 (mg/dl)

    change in serum apolipoprotein A1 (mg/dl) will be measured by an immuno-turbidimetric procedure using AU480 clinical chemistry analyser

    Measured: baseline to 18 weeks

  15. change in serum small density low density lipoprotein cholesterol (mg/dl)

    change in serum small density low density lipoprotein cholesterol (mg/dl) will be measured using a two reagent calorimetric enzymatic homogenous system on the AU480 clinical chemistry analyzer.

    Measured: baseline to 18 weeks

  16. change in serum oxidized low density lipoprotein (mg/dl)

    change in serum oxidized low density lipoprotein (mg/dl) will be measured using a sandwich enzyme-linked immunosorbent assay, Human oxidized low density lipoprotein enzyme linked immunosorbent assay kit

    Measured: baseline to 18 weeks

  17. change in fasting plasma glucose

    change in fasting plasma glucose levels (mg/dl) will be measured on a clinical chemistry analyzer,AU480 Clinical Chemistry Analyzer, (Beckman Coulter, Inc., Diagnostics Division Headquarters, Brea CA 92821.)

    Measured: baseline to 18 weeks

  18. change in fasting plasma insulin

    change in fasting plasma insulin (uIU/ml) will be measured measured by solid-phase, two-site chemiluminescent immunometric assays using the IMMULITE 2000, (Siemens Healthcare Diagnostics, Los Angeles, CA 90045)

    Measured: baseline to 18 weeks

  19. change in insulin resistance

    change in insulin resistance will be measured using the Homeostatic Model Assessment calculator version 2 (HOMA2-IR)

    Measured: baseline to 18 weeks

Secondary outcomes (9)
  1. effect modification of adiposity

    The objective of this measure is to determine if adiposity is an effect modifier of low density lipoprotein cholesterol, lowering the effect of the macadamia nut intake. The test of this interaction will be performed using statistical analysis system (SAS) software

    Measured: baseline to 18 weeks

  2. change in serum Interleukin -6

    change in serum interleukin-6 (pg/ml) will be measured by enzyme linked immunosorbent assay(ELISA)

    Measured: baseline to 18 weeks

  3. change in serum tumor necrosis factor alpha

    change in serum tumor necrosis factor alpha (pg/ml) will be measured by enzyme linked immunosorbent assay(ELISA)

    Measured: baseline to 18 weeks

  4. change in serum soluble selectin (ng/ml)

    change in serum soluble selectin (ng/ml) will be measured by enzyme linked immunosorbent assay(ELISA)

    Measured: baseline to 18 weeks

  5. change in serum soluble -intercellular adhesion molecule 1 (ng/dl)

    change in serum soluble -intercellular adhesion molecule 1 (ng/dl)will be measured by enzyme linked immunosorbent assay(ELISA)

    Measured: baselline to 18 weeks

  6. change in serum soluble -vascular adhesion molecule 1 (ng/dl)

    change in serum soluble -intercellular adhesion molecule 1 (ng/dl)will be measured by enzyme linked immunosorbent assay(ELISA)

    Measured: baselline to 18 weeks

  7. change in C reactive protein

    change in C reactive protein (mg/l) will be measured by enzyme linked immunosorbent assay(ELISA)

    Measured: baseline to 18 weeks

  8. change in Malondialdehyde

    change in Malondialdehyde (micromole/l) will be measured by a competitive enzyme-linked immunosorbent assay

    Measured: baseline to 18 weeks

  9. change in Prostaglandin F2 alpha

    change in Prostaglandin F2 alpha will be measured by a competitive enzyme-linked immunosorbent assay

    Measured: baseline to 18 weeks

Timeline

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

  1. First posted14 Jan 2019
  2. Study start24 Jun 2019
  3. Primary completion25 Nov 2019
  4. Study completion25 Nov 2019

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
Crossover
Masking
Single blind
Who is masked
Investigator
Enrolment
38 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03801837
Sponsor's protocol ID
5190008
Acronym
MAC
Status last verified
Mar 2023
First submitted
7 Jan 2019
Last updated
21 Mar 2023
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Jones JL, Sabate J, Heskey C, Oda K, Miles F, Rajaram S. Macadamia nut effects on cardiometabolic risk factors: a randomised trial. J Nutr Sci. 2023 May 8;12:e55. doi: 10.1017/jns.2023.39. eCollection 2023.

    PubMed 37180485

Questions about this trial

What is this clinical trial studying?

A study testing Macadamia Nut in people with Cardiovascular Risk Factor and Heart Diseases, run by Loma Linda University 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 9 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 21 Mar 2023. 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?

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?

change in body weight (time frame: baseline to 18 weeks). The study lists 19 primary outcomes in all. 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 NCT03801837, which also lists 1 linked publication.

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 21 Mar 2023.

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