My hair grows about 1/2" a month, too, but it used to grow faster when I was younger. Back when my daughter was small and we had the same haircut, I used to have to get a trim more often than she did. Then she bleached out her hair and it took forever to grow out. It seems like I had twice the growth rate that she did.

My hair seems to grow pretty fast, I think it actually grows faster than it used. 

I haven't yet noticed a slow down in growth or thickness
yet(I've always been fine and thin) but I haven't yet entered menopause.  I figure slow down in growth and
thickness will start then.  I'll be in trouble, too because
my hair is already rather thin and slow growing.  My hair grows about 5-6 inches a year.  My mom, who is 79, says now she's old she doesn't have to bother shaving her legs  much any more because that process slows or stops with old age.  One good thing, I guess.

Maybe I am only thinking my hair grows faster on account of I am always having to cover the regrowth of gray.  Seems like it is a constant battle to renew the color on the gray, why does the gray grow out so darned fast.   

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very true!!! i started to LOVE my roots woohoo!

Yeah, I never thought my hair grew very fast at all, until I had to touch up the dark roots after I started heavily highlighting my medium brown hair blonde.  It seems
like it was time for a touch up every time I turned around.  That's just one reason, besides many others, I  don't want to do it any more.  But yes,  as eKatherine said, it gave me a sense and appreciation
of my hair growth!! (It still never seemed to get longer).

Until December - I'd never even "officially" measured my hair to determine growth rate

But - in my teens it seemed rather sluggish - maybe 4-5 inches per year - but I was frequently brutal - swimming in pools, ocean, etc - and NO proper hair care - even used (collective gasp, ladies....) Prell shampoo or head and shoulders.  Might as well have gotten out the comet or ajax and done a good scrub - ha ha

In my twenties - pregnancy - prenatals - I couldn't believe rapid growth that lasted about 4 years - 7-8 inches per year (going by photos from that time) - it was AMAZING!!!!

Thirties - trimmed about 2-3 inches 2-3 times per year - always kept hair below waist, above hip...  Seemed rather ordinary - nothing special

Now - Forties.... Babying my hair has become my hobby and my passion - have kept it up with hair sticks for about 15 months - doing "all the right things", taking supplements..... It really does seem thicker and shinier than last decade - or perhaps just bouncier and happier.  Has become more wavy and with more heavy, curly hairs mixed in with my baby fine straight ones - and - very, very few split or thin ends!  And - the growth rate seems better than in the last decade  - I guess I'll have to wait till the February measure up!

nightowl