Why do some people go bald? – Sarthak Sinha

Why do some people go bald? – Sarthak Sinha


What do Charles Darwin, Michael Jordan,
and Yoda have in common? They, like many other historical
and fictive individuals, are bald, in some cases by their own choice. For centuries, a shining dome has been
a symbol of intelligence, but despite this, many balding people
still wish their hair would return. Scientists have long pondered, “Why do some people lose their hair,
and how can we bring it back?” The full-headed among us have about
100,000 to 150,000 hairs on our scalps, and scientists have discovered two things
about this dense thicket. Firstly, the sprouting hair we see
is mostly made up of keratin, the protein leftover from dead cells
that are forced upwards as new cells grow beneath them. Secondly, the structures
that drive hair growth are called hair follicles, a network of complex organs
that forms before we’re born, and grows hair in an everlasting cycle. This cycle has three main phases. The first is anagen, the growth phase, which up to 90% of your hair follicles
are experiencing right now, causing them to push up hair
at a rate of one centimeter per month. Anagen can last for two to seven years,
depending on your genes. After this productive period, signals within the skin instruct
some follicles to enter a new phase known as catagen, or the regressing stage, causing hair follicles to shrink
to a fraction of their original length. Catagen lasts for
about two to three weeks and cuts blood supply to the follicle,
creating a club hair, meaning it’s ready to be shed. Finally, hairs enter telogen,
the resting phase, which lasts for ten to twelve weeks, and affects about
5-15% of your scalp follicles. During telogen, up to 200 club hairs
can be shed in a day, which is quite normal. Then, the growth cycle begins anew. But not all heads are hairy, and, in fact, some of them grow
increasingly patchy over time in response to bodily changes. 95% of baldness in men can
be attributed to male pattern baldness. Baldness is inherited, and in people with this condition, follicles become incredibly sensitive
to the effects of dihydrotestosterone, a hormonal product
made from testosterone. DHT causes shrinkage
in these overly sensitive follicles, making hair shorter and wispier. But loss isn’t sudden. It happens gradually, along a metric
known as the Norwood Scale, which describes the severity of hair loss. First, hair recedes along the temples, then hair on the crown begins to thin
in a circular pattern. At the highest rating on the scale, these balding areas meet
and expand dramatically, eventually leaving only a ring
of sparse hair around the temples and the back of the head. Genetics isn’t all that drives hair loss. Long periods of stress can release
signals that shock follicles and force them into
the resting phase prematurely. Some women experience this
after childbirth. Follicles might also lose the ability
to go into anagen, the growth phase. People going through chemotherapy
treatment temporarily experience this. But while balding may look permanent, scientific investigation
has revealed the opposite. Below the skin’s surface, the roots that give rise to our hair
actually remain alive. Using this knowledge, scientists have developed drugs
that shorten the resting phase, and force follicles into anagen. Other drugs combat male pattern baldness by blocking the conversion
of testosterone to DHT so that it doesn’t affect
those sensitive follicles. Stem cells also play a role in regulating
the growth cycle, and so scientists are investigating
whether they can manipulate the activity of these cells to encourage
follicles to start producing hair again. And in the meantime, while scientists hone
their hair-reviving methods, anyone going bald,
or considering baldness, can remember that
they’re in great company.

Comments

  1. Post
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    Jagraj Singh

    I was just about to
    get bald, my hairs have become so thin and fragile. I used so many hair
    products and tonics, but no improvement was there. One day I was surfing the
    internet and saw add regarding baldness, I ordered Hair care pack. Amazing
    results are there, my hair stopped falling and they have also become thick and
    strong

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    Mike Roman

    Baldness runs in my family im 25 and im starting to see male pattern baldness…once it starts to get worse im shaving my head completly

    And besides i dont have to worry about haircuts again…save some cash

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    CmUsIc4U

    My biology teacher once said that if a male wants to know if they will go bald, they have to check if their mom's dad (their grandpa from their mom's side) is bald. If the mom's dad is bald, then there's a big chance that they will also end up being bald, if not, then they won't go bald.

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    Мухаммед Саад

    First of all, I would like to thank you about this great video and second I have a question please, why don't many bald people use drugs to get hair again? I hope that you will answer, thank you

  12. Post
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    Junior17

    My father and his dad are bald, some of my uncles on my father's side still have all their hair (47 – 55 years old). My maternal grandfather never started losing his hair until his 50s. Maternal uncles are bald. Dear God, give a generation a break.

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    Itsu Blayt

    Pretty sure it is gravity. Your hairs on top of your head are migrating below your chin. If you really tried identifying them one by one, they are the same hair and only transfered.

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    Vicente Vazquez

    Baldness is a multibillion industry, a real cure is out of the question. Scientists mapped the whole human genome, they can clone any animal, they can incorporate technology to the brain, most of the human illnesses can be cured. But for some reason ($$$$) men baldness still exists.
    Yes ofcourse, it's a problem related to testosterone. Then, why is it that when we men produce the most testosterone is when we have a lot of hair?

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    No Chill

    😂 What's the problem? I'm sure a 60 year old bald man has lived a fuller life then a 6 year old with a head full of hair!

    This (with a host of other things) is just trying to make people feel bad about things they can't control! When in reality our persona is the most important, and that we have every bit of control over.

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