 Participants will be allocated to an intervention plan using computer-generated random numbers. Treatments comprise of 1 6g decaffeinated 5 mg caffeine coffee 250 ml with high total CGA 560 mg, or 2 6g decaffeinated coffee 250 ml with normal total CGA 224 mg, or 3 6g decaffeinated coffee 250 ml with normal total CGA and 800mg green coffee bean extract with total CGA 560mg, or 4 6g decaffeinated coffee 250 ml with normal total CGA and placebo, or 5 no treatment group. Upon arrival in the laboratory, participants will complete a 24-hour food recall, a psychometric test battery, and mood and cognitive performance tests. The tests will be repeated 40 min following CGA application, which coincide with the approximated peak of CGA blood concentrations and at 120 min post treatment. Blood pressure, blood glucose and heart rate recordings will be taken prior to treatment and at 1, 30, 60, 90 and 120 min post-treatment. The response to GCE-enriched coffee will be compared to GCE supplement for each of the groups of variables. 