A new study shows that exposure to two specific 'forever chemicals' may accelerate biological aging, especially in middle-aged men. Researchers revealed a link between faster epigenetic aging, and two of these alternatives, PFNA and PFOSA, a precursor of PFOA.

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For people who feel squeamish about the process, she said it was important to know the facts around donation, adding it often helped the grieving process for families.

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