Rhonda Patrick· PhD
Now if we take circadian clock mutant mice where the circadian clock is absent, irrespective of what time we irradiate the mice, they always lost hair.
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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.
Now if we take circadian clock mutant mice where the circadian clock is absent, irrespective of what time we irradiate the mice, they always lost hair.
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So, you know, for many bone marrow transplant experiments, mice are irradiated, and then their bone marrow is depleted and one can put the new bone marrow in. And they get irradiated to the same extent as humans do. They don't die, they actually survive pretty well. And if we irradiate mice in the morning, 8:00, then those mice lose 85% of their hair. And if we irradiate the same mice with the same dose at 8:00 in the evening they retain 85% of their hair.