Bryan Johnson· Author
Sleep loss also impairs cognition, slows reflexes, and leads to poor decisions. It's tied to heart disease, diabetes, obesity, anxiety, depression and a weak immune system.
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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.
Sleep loss also impairs cognition, slows reflexes, and leads to poor decisions. It's tied to heart disease, diabetes, obesity, anxiety, depression and a weak immune system.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
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