The U.S. Food and Drug Administration (FDA) has issued a warning to consumers that they should avoid using body-building supplements that are marketed as containing steroids or steroid-like substances. The FDA's move comes in response to reports of serious adverse reactions to these substances, including severe liver injury, stroke, kidney failure, and pulmonary embolism (artery blockage in the lung). The agency is urging consumers to stop using any body-building product that claims to contain steroids or to enhance or diminish androgen-, estrogen-, or progestin-like effects in the body. One manufacturer, American Cellular Laboratories, received a warning letter telling the company to stop selling its products that contained synthetic steroids.
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