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      FDA warns against powdered caffeine

      WASHINGTON -- The Food and Drug Administration is warning consumers to avoid pure powdered pure caffeine sold on the Internet after the death of an Ohio teen.

      Even a teaspoon of the powder could be lethal -- it is equivalent to 25 cups of coffee. Eighteen-year-old Logan Stiner of LaGrange, Ohio, died May 27 after consuming it.

      The FDA said teenagers and young adults may be particularly drawn to the caffeine powder, which is a stimulant.

      The agency said the products are 100 percent caffeine and may carry minimal or insufficient labeling. Consumers may not be aware that even a small amount can cause an overdose.

      Symptoms of caffeine overdose or toxicity include rapid or erratic heartbeat, seizures, vomiting, diarrhea and disorientation.