Memory; Disturbance, MildNCT04645927
Clinical Trial to Study the Effects of Dietary Flax Beverage on Memory and Cognition
A study testing flaxseed beverage in people with Memory; Disturbance, Mild, run by St. Boniface Hospital at 2 sites in Canada.
Trial summary
Investigate the effects of flax beverage consumption on memory and cognition in subjects with memory deficit (i.e., amnestic MCI). In addition, it will correlate PET scan results (for a limited number of participants) and blood biomarker data with memory test results. Read more about this study
- Who is it for?
- Ages 60 to 84 years
- Conditions the study is for
- Memory; Disturbance, Mild
- What is being tested?
- flaxseed beverage
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 19 participants
- Where
- 2 sitesCanada
- Study dates
- 9 Oct 2020to 19 Dec 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 60 to 84 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Normal thyroid function (as determined by case history).
- Patients must have MCI or Minor Neurocognitive Disorder according to DSM-5 (see definition of DSM-5 under List of Abbreviations on Page 5).
- Ability to provide written informed consent.
- Age 60 to 84.
Who cannot join
- Any diagnosis of Alzheimer's Disease (AD) or Dementia by a physician.
- MoCA Cognitive Test Score outside 19-25 inclusive (determined in first Baseline Visit).
- DASS Test Score: Severe or Extremely Severe Score for any of the 3 measurements (Depression, Anxiety or Stress) (determined in the first Baseline Visit).
- Allergies to any of the components of the Test Product or Placebo (see Section 7.5).
- Lactose Intolerance or Allergy to any of the product components.
- Vitamin E, Vitamin B (any form), fish oil, omega pills or flaxseed products.
Show all 29Show fewer
- Any significant neurological disease as determined during screening (case history). Examples include Parkinson's, Huntington's, brain tumor, seizure disorders, subdural hematoma, multiple sclerosis, history of head trauma including multiple head trauma with loss of consciousness.
- Diagnosis of diabetes mellitus as determined during screening (case history).
- Significant cerebrovascular or cardiovascular disease as determined during screening (case history).
- Psychotic features or history of schizophrenia as determined during screening (case history).
- Another major psychiatric disorder as described in DSM 5 within the past 2 years (see definition of DSM 5 as described under List of Abbreviations on Page 5).
- History of alcohol or substance abuse as determined during screening (case history).
- History of systemic cancer as determined during screening (case history).
- Sudden changes in bowel movements for more than 2 weeks, undiagnosed rectal bleeding, or failure to defecate following the use of a laxative.
- Presence of abdominal pain, nausea, vomiting or fever.
- Difficulty in swallowing (dysphagia).
- Blood Pressure (systolic >180 and/or diastolic >110). A stable dose of hypertension drugs for elevated blood pressure during the course of the study is not exclusionary.
- Non AD Medications: Use of centrally active beta-blockers, narcotics, methyldopa and clonidine within 4 weeks prior to screening.
- Use of anti-Parkinsonian medications (e.g. Sinemet, amantadine, bromocriptine, pergolide \& selegiline) within 2 months prior to screening.
- Use of neuroleptics or narcotic analgesics within 4 weeks prior to screening.
- Use of long-acting benzodiazepines or barbiturates within 4 weeks prior to screening.
- Use of short-acting anxiolytics or sedative hypnotics more frequently than 2 times per week within 4 weeks prior to screening (note: sedative agents should not be used within 72 hours of screening).
- Initiation or change in dose of an antidepressant lacking significant cholinergic side effects within the 4 weeks prior to screening (use of stable doses of antidepressants for at least 4 weeks prior to screening is acceptable).
- Use of systemic corticosteroids within 3 months prior to screening.
- Medications with significant cholinergic or anticholinergic side effects (e.g. pyridostigmine, tricyclic antidepressants, meclizine, and oxybutynin) within 4 weeks prior to screening.
- Use of anti-convulsants (e.g. Phenytoin, Phenobarbital, Carbamazepine) within 2 months prior to screening.
- Use of warfarin (Coumadin) within 4 weeks prior to screening.
- Any prior use of any FDA approved medications for the treatment of Alzheimer's disease (e.g. tacrine, donepezil, or other newly approved medications).
- Other: Subjects who, in the PI's opinion, will not comply with study procedures.
Trial locations and contacts
2 sites in 1 country.
Canada2 sites
I.H. Asper Clinical Research Institute
Winnipeg, Manitoba, R2H 2A6
Health Sciences Ctr.
Winnipeg, Manitoba, R3A 1R9
About this study
Official title: A Double-blinded, Randomized, Placebo-controlled Trial to Study the Effects of Dietary Flax Beverage on Memory and Cognition
Investigate the effects of flax beverage consumption on memory and cognition in subjects with memory deficit (i.e., amnestic MCI). In addition, it will correlate PET scan results (for a limited number of participants) and blood biomarker data with memory test results.
Read the detailed description
This study is a multisite, double-blinded, randomized, placebo-controlled trial to examine the effect of daily flax beverage consumption on memory and cognition. This trial will be conducted at the I.H. Asper Clinical Research Institute and at the John Buhler Research Centre, Health Sciences Centre in Winnipeg, Manitoba.
Sixty men and women diagnosed with mild cognitive impairment (MCI) aged 60 to 84 years will be recruited by using advertisements/flyers, radio/TV announcements, the Alzheimer's Society network and/or will be referred by a general practitioner. The participants will be randomly divided: 30 subjects in the flax-treatment group and 30 placed in the control - placebo group. For 180 days (6 months) participants will either consume 2 servings of 330 ml of flax beverage (treatment group; 30 gms flax/day beverage) or placebo beverage (i.e. normal fiber beverage; control) per day.
Potential candidates will first be screened in-person at the I.H. Asper Clinical Research Institute; the screening visit (SV1) will last about 2 hours. The subject will first be asked to read, understand and sign a consent form. Then they will be subject to a questionnaire, a medical history, a blood pressure (BP) measurement and 2 screening memory \& cognition tests; Montreal Cognitive Assessment (MoCA), which is sensitive to MCI and the Depression Anxiety Stress Scale (DASS). Based on this initial in-person visit, investigators will determine participants' eligibility to continue in the study. Study staff will contact the Office of Clinical Research at St. Boniface Hospital to assign an eligible participant a unique study code.
If the participant meets the inclusion criteria based on their SV1 visit, investigators will plan a baseline visit for the participant. During the first baseline visit (BV1), if the subject is interested to take part in this study, they will be asked to perform the Cambridge Neuropsychological Test Automated Battery (CANTAB). This baseline visit will take about 1.0 hours to accomplish.
Investigators will then plan a second baseline visit (BV2) for a fasting blood draw, which will take approximately 15 minutes to complete. The participant will have to fast for 10 hours prior to their visit and a certified phlebotomist will collect approximately 16 mL of blood (about 3 teaspoons). In addition, investigators will review beverage consumption logs with participants and provide 30 days of beverage regime if they have a vehicle to take it home (if they have a car and are not scheduled for a PET scan).
A third baseline visit will be scheduled (BV3), where some participants will be randomly invited for a brain PET scan (10 controls from the placebo group and 10 from Flax-treatment group) at the baseline and at the end of the study. For this procedure the participant will need to fast for 4 hours. The participants have the option of declining the PET scans, if they wish.
The participants will need to be provided with 30 days of flax beverage every month (by either pickup or delivery). They also will need to submit their consumption log sheets (requested monthly) at this time to be reviewed by a study coordinator.
At the end of the study, the participants (T180) will have final follow up review of their medical history, blood pressure measurements and memory and cognitive tests (similar to those performed at the screening visit and baseline visit 1), along with a fasting blood draw (FV1, FV2). In addition, a third final study visit (FV3) will be scheduled for those who agreed to brain PET scans at the beginning of the study. In the final visit, an honorarium of $25.00 will be paid for their participation.
Each participant will visit the I.H Asper Clinical Research Institute a minimum of 5 times for the entire study. Those participants selected for brain PET scan will have 2 additional visits at John Buhler Research Centre, Health Sciences Centre; therefore, they will need a total of 7 visits for the entire study.
- Conditions
- Memory; Disturbance, Mild
- Being tested
- flaxseed beverage, control beverage
- Medical subject headings
- Lymphoma, Follicular
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
flaxseed beverageDietary supplement
Pizzey Ingredients Inc. introduced a flax beverage product that is a plant-based beverage product that is designed as an alternative to non-diary "milks" (almond milk \& soy milk). Each 330 ml serving of flax beverage contains 15 g flaxseed, which amounts to 3.75 gm of omega-3 fatty acid. Preventing MCI or even AD may be within reach, if appropriate measures are taken early enough using strategies such as dietary supplementation.
control beverageDietary supplement
Oat fibre control. For 180 days (6 months) participants will consume 2 servings of 330 ml of placebo beverage (i.e. normal fiber beverage; control) per day.
| Study group | Role | What they receive |
|---|---|---|
| Placebo control beverage group | Placebo comparator | The placebo will be provided in the same unmarked plain packages and contain the same constituents, but without flax (control packages contain oat fiber and milk). For 180 days (6 months) participants will consume 2 servings of 330 ml of placebo beverage (i.e. normal fiber beverage; control) per day. Receives: Dietary Supplement: control beverage |
| Experimental flax beverage group | Experimental | Flax beverage (30 gr daily, oral) is presented in liquid form in plain unmarked packages. For 180 days (6 months) participants will consume 2 servings of 330 ml of flax beverage (treatment group; 30 gms flax/day beverage) per day. Receives: Dietary Supplement: flaxseed beverage |
What is being measured
The primary outcome is the main question the study is designed to answer.
Cognitive/Memory score for CANTAB test.
Cambridge Neuropsychological Test Automated Battery (CANTAB). CANTAB, a test to assess neurocognitive performance. There is no cut-off score for the CANTAB test and this test is non-exclusionary.
Measured: About 1.0 hour to administer. The memory test will be administered two times, that is before and after flax beverage dietary supplementation that lasts for 6 months; which will occur at baseline (2nd visit) at then 6 months later.
Secondary outcomes (5)
Memory test using the Montreal cognitive assessment (MoCA) instrument
MoCA is used as a screening tool to determine which participants are allowed to enter the trial. Participants will be included if their score ranges from 19-25 inclusive.
Measured: The test takes 15 mins. The test will be administered 2 times. First at the 1st visit or screening and then at the final visit 6 months later.
Depression Anxiety and Stress Scale (DASS)
The DASS is a suitable instrument to screen for depressive disorders. A score of Severe or Extremely Severe for any of the 3 DASS measurements (Depression, Anxiety or Stress) will exclude the participant from the study.
Measured: The test takes 5 mins. Testing will be done at 2 time points, that is at the 1st screening visit and at 6 months.
Aberrant Brain PET scans.
A subset of participants randomly selected will have a brain PET scan. Since a limited number of participants will have PET scan (10 flax beverage group, 10 control beverage group, n=20).
Measured: One and one-half hours for each PET scan. The PET scans will be administered two times, which will occur at baseline (3rd visit) at then 6 months later.
Blood draw.
Blood (16 ml) will be collected from each participant.
Measured: Blood collection takes 5 minutes. Collection will take place at 2 time points, at a 3rd visit during baseline and at 6 months.
Blood pressure measurement.
Measured: Blood pressure measurements take 5 minutes. Blood pressure measurements will occur two times, which will occur at baseline - 2nd visit and then 6 months later.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Nov 2020
- Study start9 Oct 2020
- Primary completion21 Sep 2023
- Study completion19 Dec 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Memory; Disturbance, MildStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 19 participants (actual)
Sponsor and investigators
- Lead sponsor
- St. Boniface Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- Pizzey Ingredients, Canadian Agricultural Partnership
- Responsible party
- Principal investigator, Dr. Benedict C. Albensi, St. Boniface Hospital
- Investigators
- Barry Campbell, MD, Principal investigator, St. Boniface Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04645927
- Sponsor's protocol ID
- CT/2019/004
- Status last verified
- Aug 2023
- First submitted
- 13 Nov 2020
- Last updated
- 3 Jun 2025
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 3 Jun 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Double-blinded, Randomized, Placebo-controlled Trial to Study the Effects of Dietary Flax Beverage on Memory and Cognition
- ClinicalTrials.gov ID
- NCT04645927
- Acronym / sponsor ID
- CT/2019/004
- Conditions
- Memory; Disturbance, Mild
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 19 participants (actual)
- Lead sponsor
- St. Boniface HospitalUniversity, hospital or other
- Collaborators
- Pizzey Ingredients, Canadian Agricultural Partnership
- Study start
- 9 Oct 2020 (actual)
- Primary completion
- 21 Sep 2023 (actual)
- Study completion
- 19 Dec 2023 (actual)
- First posted
- 27 Nov 2020 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Investigate the effects of flax beverage consumption on memory and cognition in subjects with memory deficit (i.e., amnestic MCI). In addition, it will correlate PET scan results (for a limited number of participants) and blood biomarker data with memory test results.
Detailed description
This study is a multisite, double-blinded, randomized, placebo-controlled trial to examine the effect of daily flax beverage consumption on memory and cognition. This trial will be conducted at the I.H. Asper Clinical Research Institute and at the John Buhler Research Centre, Health Sciences Centre in Winnipeg, Manitoba.
Sixty men and women diagnosed with mild cognitive impairment (MCI) aged 60 to 84 years will be recruited by using advertisements/flyers, radio/TV announcements, the Alzheimer's Society network and/or will be referred by a general practitioner. The participants will be randomly divided: 30 subjects in the flax-treatment group and 30 placed in the control - placebo group. For 180 days (6 months) participants will either consume 2 servings of 330 ml of flax beverage (treatment group; 30 gms flax/day beverage) or placebo beverage (i.e. normal fiber beverage; control) per day.
Potential candidates will first be screened in-person at the I.H. Asper Clinical Research Institute; the screening visit (SV1) will last about 2 hours. The subject will first be asked to read, understand and sign a consent form. Then they will be subject to a questionnaire, a medical history, a blood pressure (BP) measurement and 2 screening memory \& cognition tests; Montreal Cognitive Assessment (MoCA), which is sensitive to MCI and the Depression Anxiety Stress Scale (DASS). Based on this initial in-person visit, investigators will determine participants' eligibility to continue in the study. Study staff will contact the Office of Clinical Research at St. Boniface Hospital to assign an eligible participant a unique study code.
If the participant meets the inclusion criteria based on their SV1 visit, investigators will plan a baseline visit for the participant. During the first baseline visit (BV1), if the subject is interested to take part in this study, they will be asked to perform the Cambridge Neuropsychological Test Automated Battery (CANTAB). This baseline visit will take about 1.0 hours to accomplish.
Investigators will then plan a second baseline visit (BV2) for a fasting blood draw, which will take approximately 15 minutes to complete. The participant will have to fast for 10 hours prior to their visit and a certified phlebotomist will collect approximately 16 mL of blood (about 3 teaspoons). In addition, investigators will review beverage consumption logs with participants and provide 30 days of beverage regime if they have a vehicle to take it home (if they have a car and are not scheduled for a PET scan).
A third baseline visit will be scheduled (BV3), where some participants will be randomly invited for a brain PET scan (10 controls from the placebo group and 10 from Flax-treatment group) at the baseline and at the end of the study. For this procedure the participant will need to fast for 4 hours. The participants have the option of declining the PET scans, if they wish.
The participants will need to be provided with 30 days of flax beverage every month (by either pickup or delivery). They also will need to submit their consumption log sheets (requested monthly) at this time to be reviewed by a study coordinator.
At the end of the study, the participants (T180) will have final follow up review of their medical history, blood pressure measurements and memory and cognitive tests (similar to those performed at the screening visit and baseline visit 1), along with a fasting blood draw (FV1, FV2). In addition, a third final study visit (FV3) will be scheduled for those who agreed to brain PET scans at the beginning of the study. In the final visit, an honorarium of $25.00 will be paid for their participation.
Each participant will visit the I.H Asper Clinical Research Institute a minimum of 5 times for the entire study. Those participants selected for brain PET scan will have 2 additional visits at John Buhler Research Centre, Health Sciences Centre; therefore, they will need a total of 7 visits for the entire study.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Placebo control beverage group | Placebo comparator | Dietary Supplement: control beverageThe placebo will be provided in the same unmarked plain packages and contain the same constituents, but without flax (control packages contain oat fiber and milk). For 180 days (6 months) participants will consume 2 servings of 330 ml of placebo beverage (i.e. normal fiber beverage; control) per day. |
| Experimental flax beverage group | Experimental | Dietary Supplement: flaxseed beverageFlax beverage (30 gr daily, oral) is presented in liquid form in plain unmarked packages. For 180 days (6 months) participants will consume 2 servings of 330 ml of flax beverage (treatment group; 30 gms flax/day beverage) per day. |
Who may qualify
- Ages
- 60 to 84 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Normal thyroid function (as determined by case history).
- Patients must have MCI or Minor Neurocognitive Disorder according to DSM-5 (see definition of DSM-5 under List of Abbreviations on Page 5).
- Ability to provide written informed consent.
- Age 60 to 84.
Key exclusion criteria (29 listed)
- Any diagnosis of Alzheimer's Disease (AD) or Dementia by a physician.
- MoCA Cognitive Test Score outside 19-25 inclusive (determined in first Baseline Visit).
- DASS Test Score: Severe or Extremely Severe Score for any of the 3 measurements (Depression, Anxiety or Stress) (determined in the first Baseline Visit).
- Allergies to any of the components of the Test Product or Placebo (see Section 7.5).
- Lactose Intolerance or Allergy to any of the product components.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| flaxseed beveragePizzey Ingredients Inc. introduced a flax beverage product that is a plant-based beverage product that is designed as an alternative to non-diary "milks" (almond milk \& soy milk). Each 330 ml serving of flax beverage contains 15 g flaxseed, which amounts to 3.75 gm of omega-3 fatty acid. Preventing MCI or even AD may be within reach, if appropriate measures are taken early enough using strategies such as dietary supplementation. | Dietary supplement | Experimental flax beverage group |
| control beverageOat fibre control. For 180 days (6 months) participants will consume 2 servings of 330 ml of placebo beverage (i.e. normal fiber beverage; control) per day. | Dietary supplement | Placebo control beverage group |
Primary outcome
Cognitive/Memory score for CANTAB test.
Time frame: About 1.0 hour to administer. The memory test will be administered two times, that is before and after flax beverage dietary supplementation that lasts for 6 months; which will occur at baseline (2nd visit) at then 6 months later.
Cambridge Neuropsychological Test Automated Battery (CANTAB). CANTAB, a test to assess neurocognitive performance. There is no cut-off score for the CANTAB test and this test is non-exclusionary.
5 secondary outcomes
Memory test using the Montreal cognitive assessment (MoCA) instrument
Time frame: The test takes 15 mins. The test will be administered 2 times. First at the 1st visit or screening and then at the final visit 6 months later.
Depression Anxiety and Stress Scale (DASS)
Time frame: The test takes 5 mins. Testing will be done at 2 time points, that is at the 1st screening visit and at 6 months.
Aberrant Brain PET scans.
Time frame: One and one-half hours for each PET scan. The PET scans will be administered two times, which will occur at baseline (3rd visit) at then 6 months later.
Blood draw.
Time frame: Blood collection takes 5 minutes. Collection will take place at 2 time points, at a 3rd visit during baseline and at 6 months.
Blood pressure measurement.
Time frame: Blood pressure measurements take 5 minutes. Blood pressure measurements will occur two times, which will occur at baseline - 2nd visit and then 6 months later.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Jun 2025.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Barry Campbell, MD principal investigator
St. Boniface Hospital
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing flaxseed beverage in people with Memory; Disturbance, Mild, run by St. Boniface Hospital at 2 sites in Canada.
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 4 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: finished, as of the sponsor's last update on 3 Jun 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in Canada. 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?
Cognitive/Memory score for CANTAB test. (time frame: About 1.0 hour to administer. The memory test will be administered two times, that is before and after flax beverage dietary supplementation that lasts for 6 months; which will occur at baseline (2nd visit) at then 6 months later.). 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 3 Jun 2025.