Table 1.

Tissue H₂S concentrations.

Sample	Subject	H2S concentration (μM)
Serum	Mouse [55]	23
	Rat [40], [55]	30–46
Blood	Mouse [53], [78], [88], [89], [90], [91], [92], [93], [94]	7–80
	Rat [34], [82], [83], [84], [85], [86], [87], [88]	7–63
	Human [11], [34], [40], [43], [78], [79], [80], [81]	2–110
Brain	Rat [11], [34]	50–160
	Human [11], [34]	50–160