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Type 2 DiabetesNCT02291250

Effect of Soft Fruit on Postprandial Blood Glucose

A study testing Blackcurrants with polycal OGTT, Greencurrants with polycal OGTT and Blackcurrants with glucose OGTT in people with Type 2 Diabetes, run by University of Aberdeen at 1 site in United Kingdom.

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 The sponsor has not verified this record for over two years, so it may be out of date.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

Dietary strategies for alleviating health complications associated with type 2 diabetes (T2D) are being pursued as alternatives to pharmaceutical interventions. Berries such as blackcurrants that are rich in polyphenols may influence carbohydrate digestion and absorption and thus postprandial glycaemia. Read more about this study

Who is it for?
Ages 21 to 70 yearsHealthy volunteers can take part
Conditions the study is for
Type 2 Diabetes
What is being tested?
Blackcurrants with polycal OGTT, Greencurrants with polycal OGTT and Blackcurrants with glucose OGTT
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
16 participants
Where
1 siteUnited Kingdom
Study dates
Nov 2014to Sep 2022
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 21 to 70 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Obese male or female (postmenopausal) healthy non-smoking volunteers (BMI over 25kg/m2)
  • Aged >21 and <70 years

Who cannot join

  • Medical exclusion criteria
  • Chronic illness, including:
  • thromboembolic or coagulation disease
  • unregulated thyroid disease
  • kidney disease
  • hepatic disease
Show all 20Show fewer
  • severe gastrointestinal disorders
  • pulmonary disease (e.g. chronic bronchitis, COPD)
  • diabetes
  • Alcohol or any other substance abuse
  • Eating disorders
  • Psychiatric disorders (including severe depression, lithium treatment, schizophrenia, severe behavioural disorders)
  • Non-postmenopausal women
  • Medication exclusion criteria
  • Oral steroids
  • Tricyclic antidepressants, neuroleptics
  • Anticoagulants
  • Digoxin and anti-arrhythmics
  • Chronic use of anti-inflammatories (e.g. high doses of aspirin, ibuprofen), Insulin, -Sulphonylureas, Thiazolidinediones (glitazones), metformin.
  • Anti-obesity medication e.g. Orlistat

Trial locations and contacts

1 site in 1 country.

United Kingdom1 site, 1 recruiting
  • University of Aberdeen Rowett Institute of Nutrition and Health

    Aberdeen, AB21 9SB

    Nigel Hoggard, PhD, 01224 716655, N.Hoggard@abdn.ac.uk

    Nigel Hoggard, PhD

    Recruiting

Other trials in United Kingdom

About this study

Dietary strategies for alleviating health complications associated with type 2 diabetes (T2D) are being pursued as alternatives to pharmaceutical interventions. Berries such as blackcurrants that are rich in polyphenols may influence carbohydrate digestion and absorption and thus postprandial glycaemia. In addition berries have been reported to alter incretins as well as to have anti-oxidant and anti-inflammatory properties that may also affect postprandial glycaemia. This study investigated the acute affect blackcurrants on glucose metabolism in overweight/obese volunteers .

Read the detailed description

Sixteen overweight/obese volunteers from the Aberdeen area will be recruited into a randomised controlled study. Volunteers will be randomised into four groups matched for BMI and age and given 200 grams of blackcurrants (which contain anthocyanins) or greencurrants (which naturally contain no anthocyanins), followed by an OGTT.

The consumption of the currants will be followed by an oral glucose tolerance test (OGTT) with Polycal (complex carbohydrate) or glucose (simple carbohydrate) as the carbohydrate load.

There will be a one week minimum wash out period between each intervention. All interventions will be randomised and blinded as far as possible in a cross-over design where the volunteers are acting as their own control. The volunteers will be asked to consume a low phytochemical diet three days prior to taking the currants all occasions. In addition, they will be asked to record what they ate over the same period in a simple food diary.

The following intervention will be carried out on 16 overweight/obese male/postmenopausal female non-smoker volunteers:

  1. Control: sugar matched (matched to currant sugar content) water with polycal (complex carbohydrate load)
  2. Blackcurrants (which contain anthocyanins; 200grams) with polycal (complex carbohydrate load)
  3. Blackcurrants (which contain anthocyanins; 200grams) with glucose (simple carbohydrate load)
  4. Greencurrants (which naturally contain no anthocyanins; 200grams) with polycal (complex carbohydrate load)

Note: the polycal will contain the equivalent glucose load as given in intervention 3 assuming complete hydrolysis of all carbohydrates.

Conditions
Type 2 Diabetes
Being tested
Blackcurrants with polycal OGTT, Greencurrants with polycal OGTT, Blackcurrants with glucose OGTT, Sugar matched water with polycal OGTT
Keywords
anthocyanin, blackcurrant, greencurrant, glucose, polyphenol, post prandial glucose
Medical subject headings
Diabetes Mellitus, Type 2

What participants receive

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

  • Blackcurrants with polycal OGTTDietary supplement

    Sixteen overweight/obese volunteers from the Aberdeen area will be recruited into a randomised controlled study. Volunteers will be randomised into four groups matched for BMI and age and given 200 grams of blackcurrants (which contain anthocyanins) or greencurrants (which naturally contain no anthocyanins), followed by an OGTT.

    The consumption of the currants will be followed by an oral glucose tolerance test (OGTT) with Polycal (complex carbohydrate) or glucose (simple carbohydrate) as the carbohydrate load.

    The equivalent carbohydrate load will be standardised across the groups

  • Greencurrants with polycal OGTTDietary supplement

    Sixteen overweight/obese volunteers from the Aberdeen area will be recruited into a randomised controlled study. Volunteers will be randomised into four groups matched for BMI and age and given 200 grams of blackcurrants (which contain anthocyanins) or greencurrants (which naturally contain no anthocyanins), followed by an OGTT.

    The consumption of the currants will be followed by an oral glucose tolerance test (OGTT) with Polycal (complex carbohydrate) or glucose (simple carbohydrate) as the carbohydrate load.

    The equivalent carbohydrate load will be standardised across the groups

  • Blackcurrants with glucose OGTTDietary supplement

    Sixteen overweight/obese volunteers from the Aberdeen area will be recruited into a randomised controlled study. Volunteers will be randomised into four groups matched for BMI and age and given 200 grams of blackcurrants (which contain anthocyanins) or greencurrants (which naturally contain no anthocyanins), followed by an OGTT.

    The consumption of the currants will be followed by an oral glucose tolerance test (OGTT) with Polycal (complex carbohydrate) or glucose (simple carbohydrate) as the carbohydrate load.

    The equivalent carbohydrate load will be standardised across the groups

  • Sugar matched water with polycal OGTTDietary supplement

    Sixteen overweight/obese volunteers from the Aberdeen area will be recruited into a randomised controlled study. Volunteers will be randomised into four groups matched for BMI and age and given 200 grams of blackcurrants (which contain anthocyanins) or greencurrants (which naturally contain no anthocyanins), followed by an OGTT.

    The consumption of the currants will be followed by an oral glucose tolerance test (OGTT) with Polycal (complex carbohydrate) or glucose (simple carbohydrate) as the carbohydrate load.

    The equivalent carbohydrate load will be standardised across the groups

Study groups in NCT02291250
Study groupRoleWhat they receive
Sugar matched water with polycal OGTTExperimental1. Control: sugar matched (matched to currant sugar content) water with polycal 2. Blackcurrants (200grams) with polycal 3. Blackcurrants (200grams) with glucose 4. Greencurrants (200grams) with polycal Sixteen overweight/obese volunteers from the Aberdeen area will be recruited into a randomised controlled study. Volunteers will be randomised into four groups matched for BMI and age and given 200 grams of blackcurrants (which contain anthocyanins) or greencurrants (which naturally contain no anthocyanins), followed by an OGTT. The OGTT will be carried out with glucose as a simple carbohydrate load or polycal as a complex carbohydrate load. Volunteers will be randomised into four groups (n=4 per group). One week wash out between treatments
Receives: Dietary Supplement: Sugar matched water with polycal OGTT
Blackcurrants with polycal OGTTExperimental1. Blackcurrants (200grams) with polycal 2. Blackcurrants (200grams) with glucose 3. Greencurrants ( 200grams) with polycal 4. Control: sugar matched (matched to currant sugar content) water with polycal Sixteen overweight/obese volunteers from the Aberdeen area will be recruited into a randomised controlled study. Volunteers will be randomised into four groups matched for BMI and age and given 200 grams of blackcurrants (which contain anthocyanins) or greencurrants (which naturally contain no anthocyanins), followed by an OGTT. The OGTT will be carried out with glucose as a simple carbohydrate load or polycal as a complex carbohydrate load as decribed above. Volunteers will be randomised into four groups (n=4 per group). One week wash out between treatments
Receives: Dietary Supplement: Blackcurrants with polycal OGTT
Blackcurrants with glucose OGTTExperimental1. Blackcurrants (200grams) with glucose 2. Greencurrants (200grams) with polycal 3. Control: sugar matched (matched to currant sugar content) water with polycal 4. Blackcurrants (200grams) with polycal Sixteen overweight/obese volunteers from the Aberdeen area will be recruited into a randomised controlled study. Volunteers will be randomised into four groups matched for BMI and age and given 200 grams of blackcurrants (which contain anthocyanins) or greencurrants (which naturally contain no anthocyanins), followed by an OGTT. The OGTT will be carried out with glucose as a simple carbohydrate load or polycal as a complex carbohydrate load as decribed above Volunteers will be randomised into four groups (n=4 per group). One week wash out between treatments
Receives: Dietary Supplement: Blackcurrants with glucose OGTT
Greencurrants with polycal OGTTExperimental1. Greencurrants (200grams) with polycal 2. Control: sugar matched (matched to currant sugar content) water with polycal 3. Blackcurrants (200grams) with polycal 4. Blackcurrants (200grams) with glucose Sixteen overweight/obese volunteers from the Aberdeen area will be recruited into a randomised controlled study. Volunteers will be randomised into four groups matched for BMI and age and given 200 grams of blackcurrants (which contain anthocyanins) or greencurrants (which naturally contain no anthocyanins), followed by an OGTT. The OGTT will be carried out with glucose as a simple carbohydrate load or polycal as a complex carbohydrate load as decribed above. Volunteers will be randomised into four groups (n=4 per group). One week wash out between treatments.
Receives: Dietary Supplement: Greencurrants with polycal OGTT

What is being measured

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

  1. Plasma Glucose Area Under the Curve

    Measured: Plasma was collected at -15, -10 and -5 (fasted) and at 15, 30, 45, 60, 90, 120, 150 and 300 min post currant ingestion

Secondary outcomes (1)
  1. Plasma Insulin Area Under the Curve

    Measured: Plasma was collected at -15, -10 and -5 (fasted) and at 15, 30, 45, 60, 90, 120, 150 and 300 min post currant ingestion

Timeline

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

  1. First posted14 Nov 2014 (estimated)
  2. Study startNov 2014
  3. Primary completionSep 2022 (estimated)
  4. Study completionSep 2022 (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
Treatment
Allocation
Randomised
Intervention model
Crossover
Masking
Single blind
Who is masked
Participant
Enrolment
16 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT02291250
Sponsor's protocol ID
Rowett 905
Status last verified
Feb 2021
First submitted
11 Nov 2014
Last updated
21 Feb 2021
Results posted
No
Data monitoring committee
Yes
Individual data sharing
Undecided

Questions about this trial

What is this clinical trial studying?

A study testing Blackcurrants with polycal OGTT, Greencurrants with polycal OGTT and Blackcurrants with glucose OGTT in people with Type 2 Diabetes, run by University of Aberdeen at 1 site in United Kingdom.

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 2 inclusion and 20 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 Feb 2021. 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 Kingdom. 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?

Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

Contact Nigel Hoggard, PhD ([+44] (0) 1224 438655, N.Hoggard@abdn.ac.uk), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Plasma Glucose Area Under the Curve (time frame: Plasma was collected at -15, -10 and -5 (fasted) and at 15, 30, 45, 60, 90, 120, 150 and 300 min post currant ingestion). 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 Feb 2021.

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