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The environment was calm and relaxed, and the nurses took great care to ensure I was comfortable throughout

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Our bodies dont create it, meaning we have to receive it from diet or supplementation

A mouse metabolises on a faster clock than a human, and a controlled diet in a cage is not a free-living human diet so even the week-numbers above should be read as the shape of a gradual response, not a promise that a human would see anything on the same calendar