Your body naturally produces hydrogen sulfide when you ingest meat. What is does in the body is control body temperature, long term memory, it causes flatulence. It acts as a vasodilator and it also...
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Cyanide can have both acute (large single event exposure) and chronic (long term low exposure) effects
Acute poisoning.
Inhalation or ingesion of high concentrations of cyanide causes apnea, coma...