Andrew Huberman· PhD
If you were to eat a grapefruit, you're going to extend the life of cortisol in your bloodstream by anywhere from 25 to 50%.
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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.
If you were to eat a grapefruit, you're going to extend the life of cortisol in your bloodstream by anywhere from 25 to 50%.
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Well, eating a grapefruit would do that or drinking some grapefruit juice.
And then there are things like grapefruit that, believe it or not, are very potent at inhibiting the enzymes that break down cortisol.