Isotopic values of diabetes (DB) patient's blood plasma.

a.The DB blood plasma samples (DB-1 to DB-5) were collected from the diabetes patients, fasting for 8 hours. b.The plasma creatinine concentration, an indicator of renal function. c.The estimation of Glomerular filtration rate, an index of renal function. See Table 1 footnote e for details. d.Fasting blood glucose level. e., f.The isotope ratio is reported as the δ-notation (‰), see details in Table 1 footnotes c and d. g.The numbers in the parenthesis are the standard deviations taken all numbers of DB.