The Daily Dose Blog The Daily Dose Blog Home

Does hair grow faster in summer?

For those wondering if human hair is on a seasonal schedule, read on.

By Rich_Maloof May 9, 2013 5:44PM

Dandelions. Daylight hours. The yearning to leave work early.  

All of these things grow longer and stronger in summer. But does your hair grow any faster?

With due respect to your mom, if she’s the one who told you, it’s just not true. It may feel like the hair on your head is coming in fast when you wish for less of it on a hot day, and the heat and humidity of summer months may make your hair appear fuller or more frizzy for days on end.

Photo: Girl with long hair / courtesy of Discovery.com But all of your hair growth is genetically programmed and is not affected by seasons or weather. Hair doesn’t grow faster in summer — nor do we get a thick, bushy coat in the winter like a border collie.

Discovery News debunked the summer story and other myths about hair growth in a recent video. All of your body’s hair follicles, Discovery explains, produce hair in three cycling stages: the anagen stage, during which hair grows; the catagen stage of rest; and the talogen stage, during which hair naturally falls out.

Human hair  generally grows at a rate of about half an inch per month. People with more extended anagen stages can grow longer hair; that is, their hair has a longer time to grow before it hits the next stage. Ever wonder why you have to schedule a regular cut for the hair on your head while you never have to go in for an arm hairdo? First of all, you’re apparently thinking too much about body hair. Second, the hair on your arm, like your eyelashes or the hair on your legs, is programmed for a shorter anagen stage. It simply can’t grow longer before it falls out.

A study in the British Journal of Dermatology provides some scientific evidence that seasonal changes don’t affect human hair growth. Researchers found that the 14 men in their study group – aged between 18 and 39, and apparently lucky enough to have hair – all had anagen stages that reached a peak in early March and fell steadily in September. That means they may have had more hair on the head during summer months, but not that it was growing faster.

Thinking it through, there’s no biological reason that growth would accelerate in summertime. The rate of hair growth doesn’t depend on sunshine, heat and fertilizer like a nice lawn does. Chalk this one up to other myths a well-intended mom may have told you, like you’ll drown if you swim after lunch or that your eyes will stay crossed if you keep making that face.

More from Daily Dose:
Nazi-themed opera canceled in Germany
Brazilian woman survives harpoon shooting
What makes a kidnapper?

Subscribe to the Daily Dose

Love content like this? Friend us on Facebook, follow us on Twitter and find us on Pinterest.

Photo: courtesy of Discovery.com

inspire: live a better life

  • Off-season vacation destinations

    The 10 best off-season vacation deals in the world

    Summer and winter tend to hog all the glory when it comes to travel high seasons. Sure, you want to soak up all the time at the beach you can during the summer, and you just want to escape the cold during the last months of the year.

  • Best places for fall foliage

    The 16 best places to see fall foliage

    Who just wants to stand around and watch the red and gold leaves slowly fall from their tree branches to the ground as we move from summer to fall? Instead, take in the changing seasons while you're on the move.

  • 30 things you learn in your 30s

    30 things that will (probably) happen in your 30s

    In September, I'll turn 38. I'm at the age now where, when people ask how old I am, it takes me a minute to remember. I don't know if that's because I've already been 37 different ages and it's hard to keep straight which one I am now, or if it's because I'm in denial, or if it's because I am going senile. Maybe a combination of all of the above. Regardless, my 30s have flown by and soon they will be but a memory. So, in an effort to preserve the memory I have left (or at least keep a record of it), and to celebrate what has been an amazing decade so far, here are 30 things that have happened to me in my 30s (and will probably happen to you too):

  • Great travel tech gadgets

    The 8 best travel tech accessories for every trip

    Traveling doesn't have to be stressful. And what you can fit in your carry-on can make all the difference (and not just a fresh pair of socks), especially when you get that low battery signal.

  • The Science

    5 surprising ways to live longer

    Volunteering (and these other rituals) might be just as good as exercise when it comes to extending your life.

  • Don’t hit snooze

    7 cures for a case of the Mondays

    Use these tricks to set a better tone for the rest of the week.

  • King's Night: Amsterdam, Holland

    The 10 wildest celebrations in the world

    Whether it involves a food fight, mermaids or a torch-lit procession, people the world over know how to have a good time. Here are some of the biggest, boldest, booziest celebrations around, along with some tips to get the full experience.

  • green brain image (Courtesy of Newser)

    Scientists turn bad memories to happy ones

    Research could mean more effective treatment for human disorders.

  • Cultura\Getty Images(Cultura\Getty Images)

    4 reasons journaling is good for you

    An entry a day might keep the doctor away (or at least the shrink).

  • Getty Images(Getty Images)

    Appreciating the Small Things in Life

    One woman's shout-outs to daily moments of joy — and how to cultivate them.

  • Woman jogging (Photo: Huffington Post)
  • Getty Images // Magazine

    Little ways to feel healthier and happier

    Our best health and fitness tips including the one move that tones all, berry news, and more.

about rich maloof
buzzing now on msn living
inspire videos
editor's picks