The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Thyroid conditions may make getting pregnant impossible.
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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
This bleeding heart plant (the genus Dicentra) is an example of an angiosperm.
Heart
Heart
Pictures of Bypass (Heart)
J. M. W. Turner, Rain, Steam, and Speed—The Great Western Railway.