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What Actually Causes Dandruff? | Fire In Zero-G!! - At Up-Tube.com

What Actually Causes Dandruff? Fire in ZERO-G!! 5 months ago   09:02

Veritasium
This fungus lives on your scalp and may affect the genes you express.
Check out Head & Shoulders research on getting rid of dandruff: https://ve42.co/HS

Animation by Pindex: https://ve42.co/pindex

When I started this project, I wasn't sure what caused dandruff and I also didn't think much science would go into making a shampoo like Head & Shoulders. So what I learned really surprised me:

There are hundreds of scientists working on this shampoo. They run crazy-sounding experiments like hanging hair near Tokyo highways to understand how real-world environments deposit dirt on hair. They use sophisticated scientific techniques like electron microscopes, nuclear magnetic resonance and gene sequencing to study dandruff on the molecular level.

In fact they sequenced the entire genome of Malassezia globosa in 2002, one year after the human genome project. Their findings are published in international refereed journals. What they have found is that the Malassezia fungi create free fatty acids as byproducts of their digestion, which for some people create irritation and lead to hyper-proliferation of skin cells, flaking, histamines, inflammatory cytokines, and blood proteins reaching the surface of the skin. These findings indicate the unhealthiness of dandruff scalp and suggest a possible remedy - controlling the metabolism of the Malassezia fungi. This is achieved using different active ingredients in different products and different parts of the world, including zinc pyrithione, selenium sulfide, and piroctone olamine. With the reduction of irritants, the scalp actually expresses different genes, producing a signature more similar to a non-dandruff baseline scalp.

Music from Epidemic Sound: http://epidemicsound.com
Music also by Kevin MacLeod: http://incompetech.com

Comments 2646 Comments

Craig Shapcott
Shooter McGavin works for H&S now??
Les
Sooo...to avoid dandruff WASH the hair so the fungi dont have sebum to feed on. Since they wont have anything to feed they wont create biproducts that damage the skin?
James Tang
Dinosaurs are chinese
Rajarshi Koona
Head and shoulders :the thing on your head (hair) falls on your shoulders by using it
Yaasi Kasa
This video is fake news!
Ravn
I've used head and shoulders for more than 10 years, and it only helps temporary, once I stop using it, everything goes back to how it was very quick, and 10 times worse..
Dimitrie Pîrghie
Wow, Romanian subtitles.
AriVovp
And you smell bacteria just like that
Devrigado
Used your garbage head and shoulders and its useless btw ) go to a medic if you need to treat it
Roy
Head and shoulders suck, ruins hair damage everything... How do they make money? My shampoo that comes from Japan and Korea works better then head &shoulder
BorderGuards
Reduce your omega 6 fatty acids
Scott L
Head and shoulders gave me dandruff. Once I stopped using that crap I was fine.
AFFE NOWU
And what if Head and Shoulders doesn't help at all?
Dark King
I just learned something I shouldn't have.
Chris Abby
Lost my hair using head & shoulders... Worst shampoo ever
myid gan
I use clear 🤣
Imatallelf
how awkward would it be to find out you have lice at that lab
Ryan Schaffer
This was absolutely fascinating. I wish they'd hurry up and find a cure for hand eczema.
Raft Grumpy
Easiest way to get rid of dandruff is to wash your hair only with water. Head and shoulders causes hair loss...
Rob J
I'm going to take a wild guess here and say that diet probably plays a bigger part than they're willing to admit.
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Fire in ZERO-G!! What Actually Causes Dandruff? 5 months ago   07:48

In a zero-g plane I experimented with flames and slinkies with surprising results.
Check out e-penser's video: http://ve42.co/EPzeroG
Check out Physicsgirl's video: http://ve42.co/PGzeroG

Thanks to Novespace: http://ve42.co/novespace

Special thanks to Patreon Supporters:
Tony Fadell, Donal Botkin, Nick Luchsinger, Jeff Straathof, Zach Mueller, Ron Neal, Nathan Hansen

The zero-g plane allows for a lot of experiments to be conducted without the expense of getting equipment into orbit. Apparently 80% of microgravity research can be performed in a zero-gravity plane, which is much cheaper than going to space. The flame from the lighter seemed much lazier in zero-g because without weight there is no buoyant force and therefore no convection. This makes the process of combustion more challenging because it's difficult for oxygen to reach the fuel.

Music from the Epidemic Sound: http://ve42.co/epidemic
"Serene Story 2" "In Orbit 2"