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Thyroid conditions may make getting pregnant impossible.
The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
There are more nerve cells in one human brain than there are stars in the Milky Way.
The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.