Biology is a complex subject and we've had far too many sensationalist stories based on a single research paper. Too often, results aren't replicated by other labs. Worse yet, more than 90% of results from mouse studies fail to yield any effect in humans. So let's calm down before we get over-excited, and wait to see what subsequent research may reveal. Especially as here we see generalizations (e.g. "reduced") rather than actual data (e.g. a reduction of X% was seen after Y days among Z% of experimental animals versus X% in the control group, with P=.95).

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