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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The problem compounds in pipelines. Each TransformStream adds another layer of promise machinery between source and sink. The spec doesn't define synchronous fast paths, so even when data is available immediately, the promise machinery still runs.

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