Peter Attia· MD
The vaginal fluid is acidic. How how acidic? Five. PH of five. And the semen is a pH of seven. It's all buffered. So that's as a hostile environment. So it has to get out of there quickly.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
The vaginal fluid is acidic. How how acidic? Five. PH of five. And the semen is a pH of seven. It's all buffered. So that's as a hostile environment. So it has to get out of there quickly.
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