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The Ineos Grenadiers cyclist had seemed poised to become the oldest Giro winner in history - beating the record of Fiorenzo Magni, who was 34 when he won in 1955.

The oldest Giro winner is Fiorenzo Magni, who was 34 when he won in 1955.

Fiorenzo Magni was 34 when he won the Giro in 1955.

But evidence of the potential effects of PVA “are scarce,” said Magni, who co-authored a study that did not find toxic effects associated with the compound in fish embryos and a species of water flea.

“It is now urgent for the scientific community to focus its attention on these new emerging pollutants,” said Stefano Magni, an assistant professor of ecology in the biosciences department at the University of Milan who has studied the compound’s possible toxicity but was not involved in the study commissioned by Blueland.