Direct evidence is thin. The claim is plausible and aligns with adjacent findings, but there isn't yet a body of high-quality work that would let us call it well-supported on its own terms.
are there any studies that have looked specifically at vaping and sperm quality or testosterone levels um and is there any evidence that uh smoking cigarettes is good for testosterone levels or sperm production because I'm guessing the answer is no I feel like nowadays we just say don't smoke um but the data are the data who knows maybe nicotine can help sperm I have no idea right uh it's possible I don't think we have the data on that yet
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.