The Effect of High and Low Roasted Coffee on Vascular Response

Inclusion Criteria: * Male * 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) * Smoking * Vegetarians or vegans