Figure 7.

Quantification of human H₂S plasma levels, as released from acid-labile sulfur, in male and female healthy donors (age range 25–50 years). H₂S and testosterone plasma levels were detected as described in the Methods section. T levels in male subjects were higher compared with females and H₂S values followed the same profile, being higher in males compared with females. Statistical analysis was by Student's t-test (***P < 0.001, *P < 0.05; n = 7).