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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.