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Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.
Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
Cyanide works by making the human body unable to use oxygen.
The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.
![Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater,](https://biology-forums.com/gallery/47/medium_33_17_02_12_6_59_59_20201820.jpeg)
![Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater,](https://biology-forums.com/gallery/47/medium_33_17_02_12_6_59_59_2022115.jpeg)