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Kefir Cholesterol Lowering Pilot Study

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ClinicalTrials.gov Identifier: NCT04247139
Recruitment Status : Active, not recruiting
First Posted : January 29, 2020
Last Update Posted : July 18, 2022
Information provided by (Responsible Party):
University of Alberta

Brief Summary:
High cholesterol (a type of fat in humans blood) may be one factor that can lead to heart disease. If people have higher cholesterol, it is possible that kefir (a food similar to yogurt) may help to control blood cholesterol levels.

Condition or disease Intervention/treatment Phase
Hypercholesterolemia Other: Kefir Not Applicable

Detailed Description:
New research shows that kefir (which contains bacteria also known as microbes), similar to yogurt, may improve health by lowering cholesterol levels. Much of this research however, focuses on traditional types of kefir, which differ significantly from commercially prepared kefir with regards to the types of microbes in each kefir. Additionally, there is a lack of research looking at how commercial kefir compares to traditional kefir in its ability to improve health. This has led to the consumer being confused about the health benefits they believe they are receiving, such as reduced weight gain, and improved cholesterol levels, when they purchase and consume commercial kefir. The researchers have produced a commercially usable kefir that has the health benefits of traditional grain fermented kefir. This was accomplished with only a small subset of microbes present in the traditional kefir, leading to a much easier product to commercialize and produce. Thus, this study aims to look at whether kefir, produced in the researchers laboratory and commercially available kefir, given to males for in two separate months, results in any cholesterol lowering effects. Successful completion of this project could potentially result in the development of a new commercial kefir with health benefits that are supported by scientific research and testing. In addition, if positive results are seen, a larger study will be carried out to ensure that results of the current study are consistent for the Canadian population.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 21 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single (Participant)
Masking Description: Both types of kefir will be flavoured the same, and visually look the same.
Primary Purpose: Treatment
Official Title: Effect of Traditionally and Commercially Prepared Kefir on Cholesterol Levels in Adult Males With Borderline High Cholesterol Levels
Actual Study Start Date : July 7, 2020
Actual Primary Completion Date : April 25, 2022
Estimated Study Completion Date : December 30, 2022

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Commercial Kefir
Commercially produced kefir
Other: Kefir
commercial versus traditional kefir

Experimental: Traditional Kefir
Traditionally grown kefir
Other: Kefir
commercial versus traditional kefir

Primary Outcome Measures :
  1. Change in Blood Lipids following provision of each type of Kefir [ Time Frame: 4 weeks ]
    Change in blood lipid panel (HDL, LDL, Total Cholesterol, Triglycerides) will be measured in blood samples.

Secondary Outcome Measures :
  1. Fecal microbiota composition changes following the provision of each type Kefir [ Time Frame: 4 weeks ]
    16SrRNA-sequencing and whole metagenome sequencing will performed to determine gut microbial community changes

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   Male
Gender Based Eligibility:   Yes
Gender Eligibility Description:   Male participants
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  1. Males, aged 18-65y
  2. Moderately hypercholesterolemic adults: LDL-C between 3.2 and 4.9 mM, but otherwise healthy
  3. No history of CVD, type 2 diabetes, monogenic dyslipidemia or use of medications for hyperlipidemia (including statins).
  4. No dairy allergy

Exclusion Criteria:


Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04247139

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Canada, Alberta
University of Alberta
Edmonton, Alberta, Canada, T6G 2E1
Sponsors and Collaborators
University of Alberta
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Responsible Party: University of Alberta
ClinicalTrials.gov Identifier: NCT04247139    
Other Study ID Numbers: Pro00087964
First Posted: January 29, 2020    Key Record Dates
Last Update Posted: July 18, 2022
Last Verified: July 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by University of Alberta:
high cholesterol, kefir
Additional relevant MeSH terms:
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Lipid Metabolism Disorders
Metabolic Diseases