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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.