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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Green tea is able to stop the scent of garlic or onion from causing bad breath.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.