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AnthocyaninsNCT04637945

Inflammatory and Metabolic Responses to Long-term Dietary Supplementation With Anthocyanin-rich Blend

A study testing ACRB in people with Anthocyanins, run by Pharmanex at 1 site in United States.

Unknown status

Status not confirmed. The sponsor has not verified this record for over two years, so it may be out of date.

Official record
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Trial summary

This study will investigate the capacity of an anthocyanin-rich blend (ACRB) dietary supplement to improve the alterations in lipid and glucose homeostasis triggered by consumption of a high-fat meal. Read more about this study

Who is it for?
Ages 18 to 35 yearsHealthy volunteers can take part
Conditions the study is for
Anthocyanins
What is being tested?
ACRB
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
30 participants
Where
1 siteUnited States
Study dates
1 Jul 2021to Jun 2023
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 18 to 35 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Subject is healthy and, in the opinion of the investigator, free of any medical conditions that might affect study measurements.
  • Male or female.
  • Age between 18 - 40 years inclusive.
  • BMI between 21 - 29.9 kg/m2.
  • Female subject of childbearing potential has a negative urine pregnancy test result and agrees to use a medically approved method of birth control. Acceptable methods of birth control include: hormonal contraceptives such as oral contraceptives, hormone birth control patch (Ortho Evra), vaginal contraceptive ring (NuvaRing), injectable contraceptives (Depo-Provera, Lunelle), or hormone implant (Norplant System); double-barrier methods; non-hormonal intrauterine devices; vasectomy of partner; and non-heterosexual lifestyles.
  • Subject agrees to discontinue the use of pre- and/or probiotic and/or polyphenol supplements from 30 days prior to the screening visit and throughout the study.
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  • Subject agrees to consume less than 1/2 cup/day of foods containing anthocyanins (such as blueberries, blackberries, bilberries, cherries, grapes, grape juice, pomegranate, raspberries, huckleberries, strawberries) and no more than 1 glass/day of red wine, 3 cups/day of tea or coffee, or 10 g/day of dark chocolate from 30 days prior to the screening visit and throughout the study.
  • No known allergies to study products or components (bilberries, black currants, rice).
  • Subject is willing and able to completely consume high-fat meal and assigned study products within 15 min.
  • Subject is willing to consume a low fat/low flavonoid dinner the evening before visits 2, 3 and 5.
  • Subject has received a complete COVID-19 vaccine and is at least 6 weeks post-vaccine at the screening visit as verified by shot record or similar documentation.
  • Subject has given voluntary, written, informed consent to participate in the study.

Who cannot join

  • Age < 18 or > 40 years.
  • BMI < 21 or > 29.9 kg/m2.
  • Vegan, Vegetarian, or other dietary restrictions that would not allow the subject to consume the high-fat meal.
  • Current consumption of special diets (e.g. Atkins, keto, paleo, etc.).
  • Current participation or enrollment in another pharmaceutical, weight-loss or nutritional clinical study within the last 30 days. Device trials are exempted.
  • Regular participation in endurance exercise activities (e.g. marathon running, triathlons).
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  • Uncontrolled hypertension defined as diastolic blood pressure ≥ 95 mmHg and/or systolic blood pressure ≥ 160 mmHg.
  • Fasting blood triglycerides > 150 mg/dL.
  • Plasma amount of triglycerides accumulated in 5 h < 170 or > 700 mg/dL x 5 h after high-fat meal consumption at screening visit.
  • Self-reported Type 2 Diabetes
  • Fasting blood glucose < 50 mg/dL or > 100 mg/dL.
  • Hemoglobin A1c levels ≥ 5.7%.
  • Current smoker or use of tobacco products within the last 180 days.
  • Binge drinking (alcohol intake ≥ 5 alcoholic drinks for males or ≥ 4 alcoholic drinks for females on the same occasion, i.e. at the same time or within a couple of hours of each other).
  • Substance abuse or dependence within the last 60 days.
  • Daily use of anti-inflammatory medications including NSAIDs and aspirin within the last 30 days.
  • Use of laxative medications or other products that promote colon cleansing within the last 30 days.
  • History of restricted diets or use of herbal supplements or medications that interfere with insulin metabolism within the last 30 days.
  • History of stroke, hepatic, kidney, thyroid disease or cancer.
  • History of immune related disorders or Raynaud's disease.
  • Current clinically significant depression, anxiety or other psychiatric condition.
  • History of malabsorption or GI tract disorders.
  • History of GI surgeries (e.g. lap band, gastric bypass, etc.).
  • Diarrhea or oral antibiotic intake within the last 30 days.
  • Weight change (> 5%) within the last 30 days.
  • History of eating disorders such as bulimia, anorexia, or muscle dysmorphia.
  • Allergy or sensitivity to the study products or components of the high-fat meal.
  • Subject has not received a complete COVID-19 vaccine or is less than 6 weeks post-vaccine at the screening visit.
  • Any other condition which in the Investigator's opinion might adversely affect the subject's ability to complete the study or its measurements or which might pose significant risk to the subject.

Trial locations and contacts

1 site in 1 country.

United States1 site
  • UC Davis Nutrition Department

    Davis, California, 95616

Other trials in United States

About this study

Official title: a Randomized Placebo-controlled Study Investigating the Effects of a Long-term Dietary Supplementation With an Anthocyanin-rich Blend on the Metabolic and Inflammatory Responses to a High-fat Meal in Healthy Subjects

This study will investigate the capacity of an anthocyanin-rich blend (ACRB) dietary supplement to improve the alterations in lipid and glucose homeostasis triggered by consumption of a high-fat meal. Given the impact of Western style diets and obesity on the development of type 2 diabetes, cardiovascular disease and other pathologies, this study has major public health implications.

Read the detailed description

In particular, this study will investigate the beneficial effects of long-term (8 weeks) supplementation with ACRB on fasting and postprandial levels of plasma triglycerides, as well as other parameters of lipid and glucose homeostasis and inflammation. Postprandial changes will be evaluated after consumption of a high-fat meal.

Subjects will receive either a: i) placebo (control),or ii) ACRB product for 8 weeks. At the beginning and at the end of the 8-week period, subjects will be submitted to a metabolic challenge consisting of consuming a high-fat meal after receiving the study product (placebo, ACRB). The high-fat meal will consist of English muffin bread, sausage, egg and cheese, obtained from US market with carotenoid-free palm oil added to bring the total dietary fat to the desired level. The total weight of the high-fat meal will be 320 g with 70.5 g of fat (29.8 g of saturated fat), 270 mg of cholesterol, 65 g carbohydrate, 5.2 g sugar, and 33 g protein. The total energy content of the high-fat meal will be 1,026 Kcal with a total of 62% energy originated from fat, 25% from carbohydrates and 13% from protein. Blood will be taken by venipuncture before (baseline, 0 h) and 0.25, 0.5, 1, 2, 3 and 5 h after consumption of both the high-fat meal and the study product. Plasma will be collected and chylomicrons and peripheral blood monocytes (PBMCs) will be isolated. Blood pressure and skin carotenoid content will be measured. Subjects will be also asked to collect feces before starting and at the end of the 8 week period.

Conditions
Anthocyanins
Being tested
ACRB, Placebo

What participants receive

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

  • ACRBDietary supplement

    Product will be consumed once daily, preferably with breakfast.

  • PlaceboOther

    Product will be consumed once daily, preferably with breakfast.

Study groups in NCT04637945
Study groupRoleWhat they receive
placeboPlacebo comparatorThe placebo will be delivered in softgels consisting of colorant, olive oil, sunflower lecithin, yellow beeswax, bovine gelatin, glycerin and water.
Receives: Other: Placebo
ACRBExperimentalThe ACRB product will be delivered in softgels consisting of anthocyanin-rich blend. Each softgel will contain: i) 49 mg bilberry extract; ii) 101 mg black currant extract; and iii) 303 mg black rice extract. The high ACRB will deliver at least 108 mg anthocyanins. The product will also contain olive oil, sunflower lecithin, yellow beeswax, bovine gelatin, and water.
Receives: Dietary Supplement: ACRB

What is being measured

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

  1. Change from baseline in plasma triglycerides at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure triglycerides in plasma

    Measured: Baseline, 8 weeks

Secondary outcomes (18)
  1. Change from baseline in plasma free fatty acids at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure plasma free fatty acids in plasma

    Measured: Baseline, 8 weeks

  2. Change from baseline in total free fatty acids at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure total free fatty acids in plasma

    Measured: Baseline, 8 weeks

  3. Change from baseline in HDL at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure HDL in plasma

    Measured: Baseline, 8 weeks

  4. Change from baseline in LDL at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure LDL in plasma

    Measured: Baseline, 8 weeks

  5. Change from baseline in glucose at week 8, both at fasting and at week 8, both at fasting and at 0.25hr, 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure glucose in plasma

    Measured: Baseline, 8 weeks

  6. Change from baseline in insulin at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure insulin in plasma

    Measured: Baseline, 8 weeks

  7. Change from baseline in LPS at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure LPS in plasma

    Measured: Baseline, 8 weeks

  8. Change from baseline in LPS binding protein at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure LPS binding protein in plasma

    Measured: Baseline, 8 weeks

  9. Change from baseline in insulin resistance at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure insulin resistance in PBMCs

    Measured: Baseline, 8 weeks

  10. Change from baseline in PBMC gene expression at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to isolate RNA and measure gene expression in PBMCs. The most significantly differentially expressed transcripts will be chosen for further analysis.

    Measured: Baseline, 8 weeks

  11. Change from baseline in plasma total polyphenols at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure total polyphenols in plasma

    Measured: Baseline, 8 weeks

  12. Change from baseline in plasma total anthocyanidins at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure total anthycyanidins in plasma

    Measured: Baseline, 8 weeks

  13. Change from baseline in plasma Irisin at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to measure Irisin in plasma

    Measured: Baseline, 8 weeks

  14. Change from baseline in total blood gene expression at week 8, both at fasting and at 3hrs, and 5hrs post high-fat meal consumption

    blood sample collected by venipuncture to isolate RNA and measure gene expression in whole blood. The most significantly deferentially expressed transcripts will be chosen for further analysis.

    Measured: Baseline, 8 weeks

  15. Change from baseline in blood pressure at week 8, both at fasting and at 1hrs, 2hrs, 3hrs, 4hrs, and 5hrs post high-fat meal consumption

    blood pressure measured by sphygmomanometer

    Measured: Baseline, 8 weeks

  16. Change from baseline in fecal microbiota composition at week 8

    stool sample collected to measure gut microbiota composition using 16S rRNA gene sequences

    Measured: Baseline, 8 weeks

  17. Change from baseline in fecal short chain fatty acids at week 8

    stool sample collected to measure fecal short chain fatty acids

    Measured: Baseline, 8 weeks

  18. Change from baseline in skin carotenoids at week 4, and week 8

    skin carotenoid scanner will be used to produce a raman score of skin carotenoids

    Measured: baseline, 4 weeks, 8 weeks

Timeline

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

  1. First posted20 Nov 2020
  2. Study start1 Jul 2021
  3. Primary completion1 Dec 2022
  4. Study completionJun 2023 (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
Other
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
30 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04637945
Sponsor's protocol ID
20-PHX-0002
Status last verified
Dec 2022
First submitted
5 Aug 2020
Last updated
21 Dec 2022
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Questions about this trial

What is this clinical trial studying?

A study testing ACRB in people with Anthocyanins, run by Pharmanex 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 12 inclusion and 29 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: status not confirmed, as of the sponsor's last update on 21 Dec 2022. 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?

Results are not available in the source record.

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 from baseline in plasma triglycerides at week 8, both at fasting and at 0.5 hr, 1 hr, 2hrs, 3hrs, and 5hrs post high-fat meal consumption (time frame: Baseline, 8 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 21 Dec 2022.

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