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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Several species of squirrels have melanistic phases. In large parts of United States and Canada, the Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
Past Human Past Human
Human Memorabilia in Space Human Memorabilia in Space
Species, subspecies, populations, and individuals. Species are reproductively isolated from one anot Species, subspecies, populations, and individuals. Species are reproductively isolated from one anot
The adsorption spectrum of rhodopsin compared with the human scotopic spectral sensitivity curve. The adsorption spectrum of rhodopsin compared with the human scotopic spectral sensitivity curve.
A BLAST alignment between human myoglobin and human a-globin showing a 25% sequence identity A BLAST alignment between human myoglobin and human a-globin showing a 25% sequence identity
Video: Dissociative Disorders (Part 1)

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