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Speaker 1: to brain Stuff from how Stuff works dot com where
Speaker 1: smart happens. Hi, I'm Marshall Brain with today's question, how
Speaker 1: quickly does hair grow? The answer is it depends. If
Speaker 1: you just got a really bad haircut, it doesn't seem
Speaker 1: to grow at all. But ignoring these perceptual differences, human
Speaker 1: hair seems to grow at a pretty consistent rate of
Speaker 1: about half a millimeter per day, or about half an
Speaker 1: inch every month. It may grow faster or slower depending
Speaker 1: on your age, your genetics, and your hormonal state. For example,
Speaker 1: pregnancy seems to have an effect on hair, but half
Speaker 1: a millimeter per a is a good average. What this
Speaker 1: means is that the maximum growth rate for hair is
Speaker 1: about six inches per year. If you have short hair
Speaker 1: and you're thinking it sure would be nice to have
Speaker 1: hair down to my waist, then you're gonna have to
Speaker 1: wait five or six years for more on this and
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