The Effect of High and Low Roasted Coffee on Vascular Response
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- University of Reading
- Enrollment
- 19
- Locations
- 2
- Primary Endpoint
- Vascular response measured by flow mediated dilatation (FMD)
Study Overview
Brief Summary
Evidence suggests that a diet rich in plant phenolic compounds may induce beneficial vascular effects. Coffee is a good source of phenolic compounds called chlorogenic acids (CGA), however the level of CGA is reduced during the roasting process.
The aim of this study is to investigate the effect of coffee roasting on vascular response. The investigators hypothesize that coffee roasted to a lesser extent will exert a favourable vascular response over more heavily roasted coffee due to the higher levels of CGA.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Crossover
- Primary Purpose
- Prevention
- Masking
- Single (Investigator)
Eligibility Criteria
- Ages
- 19 Years to 35 Years (Adult)
- Sex
- Male
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •A signed consent form
- •Age 19-35 years
- •Body mass index - 18.5-30 kg/m2
- •Normal blood pressure at screening (< 150/90)
Exclusion Criteria
- •Blood pressure > 150/90 mmHg
- •Haemoglobin (anaemia marker) < 125 g/l
- •Gamma GT (liver enzymes) > 80 IU/l
- •Cholesterol > 6.5 mmol/l
- •Had suffered a myocardial infarction or stroke in the previous 12 months
- •Suffers from any reproductive disorder
- •Suffers from any blood-clotting disorder
- •Suffers from any metabolic disorders (e.g. diabetes or any other endocrine or liver diseases)
- •Any dietary restrictions or on a weight reducing diet
- •Drinking more than 21 units per week
- •On any lipid-modifying medication
- •On any blood pressure lowering medication
- •On any medication affecting blood clotting
- •Planning on altering consumption of vitamin supplements/fish oil capsules during the course of the study
- •Regular or vigorous exercise (3 times/week, 20 minutes each session)
- •Vegetarians or vegans
Arms & Interventions
High roast coffee
110mg caffeine with 108 mg chlorogenic acid at start of study
Intervention: Control (Caffeine dissolved in water) (Dietary Supplement)
Low roast coffee
110 mg caffeine with 235 mg chlorogenic acid at start of the study
Intervention: Low roast coffee (Dietary Supplement)
Control
110 mg caffeine at start of study
Intervention: High roast coffee (Dietary Supplement)
Outcomes
Primary Outcomes
Vascular response measured by flow mediated dilatation (FMD)
Time Frame: Change from baseline to 2 hours
Secondary Outcomes
No secondary outcomes reported
Investigators
Jeremy Paul Edward Spencer
Professor
University of Reading