Because of this, you may not be getting an appropriate dose of the active compound or worse, the supplement you are taking could contain unhealthy additives.

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This supplement in particular requires some oversight by a health-care professional because it contains the same active compound as one of the popular cholesterol-lowering statin medications.

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Although it will still hold an exclusive patent to sell seldafinil, the active compound in Viagra, until 2013 in the U.K., it lost a patent that prevented other companies from even selling similar drugs.

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