This one seems fairly obvious, but it is worth mentioning exactly how slow the metabolism actually is. As a frame of reference, it takes the average human around 12-48 hours to ingest, digest, and eliminate waste from food. Sloths can take 30 days to completely digest a single leaf. They rarely like to leave the safety of trees, though they will come down in order to relieve themselves. Fortunately for them, they can hold it all in and only evacuate their bowels once a week. Sloths can lose about a third of their body weight every time they defecate and urinate.

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