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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.
There are more bacteria in your mouth than there are people in the world.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.