Blood and Urine Collection and Analysis - Participants were asked to provide a blood sample, fasting where possible, and a first void morning urine sample. The blood tubes collected were: 3 x serum tubes (total 26ml); 2 x EDTA tubes (total 13ml); 1 x lithium heparin tube (6ml). A 50ml first void urine sample was also collected. Blood and urine samples were collected for the analysis of a number of markers of nutritional status and metabolic health.