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If you could remove all of your skin, it would weigh up to 5 pounds.
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.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.