Inclusion Criteria:  aged 18 years or over able and willing to participate in the study and provide written informed consent  Exclusion Criteria:  current smoker any known food allergies/intolerances history of medical conditions, including gastrointestinal disease, severe renal impairment (estimated glomerular filtration rate of <30ml/min) or renal disease, cardiovascular disease, diabetes (type 1 or type 2) and gout