Diabetes drug metformin linked with intersex freshwater fish

April 24, 2015 9:12 PM

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Eggs produced by the female fish exposed to metformin showed signs of male and female morphology.

But metformin isn't just being found on pharmacy shelves and private medicine cabinets. It's also increasingly showing up in freshwater systems. Now, new research suggests it could be to blame for intersex fish.

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