• Sekrayray@lemmy.world
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    1 year ago
    1. Smoking
    2. Smoking
    3. Smoking

    There are already a lot of good answers but I want to highlight this. Chronic tobacco smoke causes increased aging due to multiple mechanisms. Moreover, environmental tobacco exposure from second hand and third hand smoke prior to the 1990s was MASSIVE. So even if you didn’t smoke you got insane daily exposures to the same chemicals.

  • bonus_crab@lemmy.world
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    1 year ago

    Lower testosterone is probably a big part of it. Look at 23 or 24 year old enhanced bodybuilders. they look like theyre 35. For whatever reason peoples T levels have been going down about 1 percent per year for the last 50 years. Its bound to have an effect.