Tyrosine isomers and hormonal signaling: A possible role for the hydroxyl free radical in insulin resistance

Figure 1 Changes in urinary ortho-tyrosine:creatinine excretion after resveratrol treatment. For each participant, the value measured at baseline was subtracted from that measured at week 4 (i.e., Δ o-Tyr:creatinine ratio), and then the resulting values were averaged within the respective groups. The values are the means, with the standard deviations represented by vertical bars. ^aMean values were significantly different (P = 0.043). Comparisons were performed using ANOVA and Bonferroni post hoc tests; P < 0.05 was regarded as statistically significant. Republished with permission of Cambridge University Press from Brasnyó et al[18]. o-Try: Ortho-tyrosine.