How UV Causes Cancer and Aging

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2 år sedan

UV at ground level is non-ionizing but it damages DNA and causes photoaging - how?
Also, it turns out glass doesn't block all UV (specifically UVA passes through). This is something I learned filming with the UV camera inside.
Special thanks to Dr. Hayley Golbach, @hayleysgold on twitter
Ultraviolet light causes damage to DNA, leads to cancer and photoaging: age spots and wrinkles. I was curious about this because UV is technically non-ionizing. A photon of UV doesn't have enough energy to strip an electron off atoms or molecules. However it does have enough energy to trigger photo-chemical reactions. For example, it causes pyrimidine dimers - the unauthorized covalent bonding of adjacent thymine or cytosine bases in our DNA. If these spots are not properly repaired, they may lead to mutations and cancer. Photoaging is typically the result of degradation of collagen and elastin fibers - scaffolding that supports the skin. This leads to wrinkles and saggy-looking skin.
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Music from Epidemic Sound "Serene Story 2"

Astitva Chaturvedi
Astitva Chaturvedi 18 dagar sedan
Very nice 👍
Yung Savvy
Yung Savvy Månad sedan
What about melanin ? It repairs dna and creates energy using the uv light.
RELANDREL Månad sedan
and why you didnt mention UV light as benefactor to vitamin D? i find that a bit lacking. many people nowadays suffer from insufficient levels of vitamin D due to inexposure of sun
Golan 2 månader sedan
Talking about how bad the sun and UV radiation is, while sitting outside in the sun.
Thirumal Priyan
Thirumal Priyan 2 månader sedan
Recently I read a article in about vitamin d ,but the points mentioned in that article is exactly opposite to the points mentioned in this video.
Harsh Sharma
Harsh Sharma 2 månader sedan
0:36 technical guruji lol Jai Hind !
Ayşegül Ayşegül
Ayşegül Ayşegül 5 månader sedan
What do you think about UV sterilizer wands ? I wanna buy it 😕
Music Time
Music Time 6 månader sedan
hi i have music free copyright in my chanel
Chris C
Chris C 6 månader sedan
Doesn't a worldwide shutdown in pollution levels lead to a increased UV Index level? How about high altitude/ mountainous regions?
Kalyan Mahata
Kalyan Mahata 6 månader sedan
蛤莱士 6 månader sedan
so if you apply sun scream on your car window you can avoid UVA?
Jeffrey Allan Backowski II
Jeffrey Allan Backowski II 6 månader sedan
I've seen the world in ultraviolet when I looked into a total solar eclipse of the sun in August 2017, I was expecting to seen multiple mini moons or something, I was dumbstruck, I could never comprehend such a thing if I had not actually seen it, my mind could barely wrap itself around what it was seeing, a smaller smaller invisible sun? Surely someone would have noticed this, it had to get really close to get in-between the sun and Earth, so I got a real good close look, the regular sun is almost completely covered, you can stare right at it without squinting, it's a dark sun but really bright, it's light was a black, purplish, pinkish, redish color, everything looked like what you envision, except the color is off, yours is to purply chalkish tone, try less contrast, brighter, and it needs a lot more pink, red, and black. No one take me serious when I mention it so it's hard to ask serious questions, I just really want to know if special black sun solar panels be made, can its energy be harnessed like that, it seemed more than closer enough for a plane to run into it, has anyone ever tried too before? I'd let someone put me on a plane and fly it into the black sun, that is something I would love to experience first-hand. After those initial questions I want to learn things like it's name, and that's when all the bullsh*t information starts, there is absolutely nothing true written down about it.
Ricardo González
Ricardo González 6 månader sedan
Great video!
Taco Of Love
Taco Of Love 6 månader sedan
I found out about the car window not keeping uv rays out on a road trip in a 1995 Honda when I got sunburned in an AIr conditioned car 😂
Francisco Abreu
Francisco Abreu 6 månader sedan
Boyshinboiv McGee
Boyshinboiv McGee 7 månader sedan
4:23 oh god no turn the normal light on oh god no please dont swap the colors like that oh god oh no please no ahhhhhh
Gifts Hi
Gifts Hi 7 månader sedan
A-09 Mahima
A-09 Mahima 8 månader sedan
why are you making this video in sun?
Be Free
Be Free 8 månader sedan
That's ok aging is a natural process and if I die from skin cancer caused by spending time in the sun so be it. Without the sun I would never have existed.
volarecantare 8 månader sedan
UV and non-ionizing? Since when?
Carpal Tunnel Gadgets
Carpal Tunnel Gadgets 8 månader sedan
Wrong. You actually need some sunlight. At least 10 minutes a day. God did not make a mistake to create the sun for us.
GlobalClimateNews 8 månader sedan
Eye cancer anyone?
Victor A
Victor A 8 månader sedan
Music_Kewl_Kyle 9 månader sedan
Veritasium, do you wear sunscreen every day?
RA SHAKH 10 månader sedan
Hi, who knows if UV light and UVB phototherapy light are the same things? I am going to take a treatment for my vitiligo and a little concenrned if they are the same.
Endothelial 10 månader sedan
Should just alway dress as the joker dye hair green and alway be protected by Zinc Oxide
Endothelial 10 månader sedan
Yet niggas been able to make it 1000s of years ago, whats these long term affects of chemical sunscreens
TehNetherlands 8 månader sedan
Yeah, but people typically didn't get very old 1000's or even 100's of years ago. Go lie in the sun all you want. If you're lucky enough not to get cancer, you'll simply look older.
Endothelial 10 månader sedan
Izaak Amesta
Izaak Amesta 10 månader sedan
Why did you do that interview completely exposed to the sun?
David Ángeles
David Ángeles År sedan
The fact they discussed this in direct sunlight...
kerri dubbs
kerri dubbs År sedan
Its diet causing canser and ingredients in the sunscreens
zelen plav
zelen plav År sedan
Sunscreen chemicals are much better for you. Transdermal, my skins just loves to absorb everything.
zelen plav
zelen plav År sedan
Natural light has the full spectrum not just UV. I think we need them all.
Juan Love
Juan Love År sedan
Lies...lack of melanin IS what causes cancer. Wake-up!!
Ben Nguyen
Ben Nguyen År sedan
There was a great HumanOS podcast episode (#66), that talks about the complexities of UVA/B, and could explain why Vit-D supplementation trials have not been very promising, as it may be due to UV , Ntric Oxide , Interleukin-33, cytokine, etc. For example, UVB and UVA tends to activate regulatory B cells that *dampen the adaptive* anti-tumor/immune system.. which could be the reason why autoimmune diseases tend to increase as you go further from the equator. However, this immune system suppression may also lead to more cancers. Interestingly, UV tends to *increase the innate* immune system, useful for bacterial infections. And while long term UVA exposure is associated with Accelerated Aging/skin cancer, even low doses of UV are associated with keratinocyte/non-melanoma skin cancers. But on the flip side, UVA appears to lower blood pressure and reduce the risk of CVD. Most surprisingly, however, is that while short high exposure of UVB can lead to menaloma skin cancers, it may help with weight loss.. DESPITE the fact that UVB prevents the HFHSD-induced Uncoupling-Protein-1 in Brown-Adipose-Tissue from activating.. so the weight loss must be due to something else (UV-induced cytokines like IL-33, NitricOxide, Hydrocarbon signaling in the Liver, etc). BTW, Chris Masterjohn mentions how ultraviolet destroys riboflavin (as does losing weight/exercise)! See 23127244 for how microbes can also lead to autoimmune diseases.
R. M.
R. M. År sedan
We did not evolve in a cave or as nocturnal creatures though. All this sun-devil propaganda fails to consider millions of years of evolution and the fact that there is no natural way to produce vit. D other than sun exposure. The fact itself that we crave sunlight is telling. While excessive sun exposure is for sure damaging, moderate exposure is literally as natural as breathing air.
TheShermanTanker År sedan
I am doubtful that UV light is the cause of all skin aging- You will still get wrinkles with zero ultraviolet radiation exposure. It's more likely that it only worsens skin aging that inevitably follows with age
Cua År sedan
Dying light
JS808 År sedan
When the lady started talking about collagen and fibroblast i just pictured the meme of the floating equations and numbers. Woosh
Jay Williams
Jay Williams År sedan
Everything white is good but white people can't be in white light\black light
PEEYUSH A V År sedan
Does sun rays really cause cancer or is it a myth. Iam a marktng exctv now iam very much worried abt this.
its_ Mike
its_ Mike År sedan
As they sit in the sun lol
AngelDoll breano
AngelDoll breano År sedan
Sad.. My face looks younger than my butt smh😪😪😪
ChemE Games
ChemE Games År sedan
A lot of misinformation in the video. You know sunscreen is a multi-billion dollar business, right? You have to demonize the sun to sell them. Moderation is the key like everything else.
The Goodly Dragon
The Goodly Dragon År sedan
In the winter I had a vitamin D deficiency from not enough sun time. What is the necessary amount of time to spend outside if your skin is mostly covered?
Jordan År sedan
LMFAOOOOOOOOOO imagine being a parasite on earth that the sun is trying to kill you
Rakshith Kakunje
Rakshith Kakunje År sedan
0:49 tears falling from my eyes thinking about my buttne.
Janice Hansen
Janice Hansen År sedan
I love this! It'll be great for introducing what sun does on a cellular to my daughter, who has XP, to people who can't quite wrap their head around it.
Alain Koch
Alain Koch År sedan
whats the best place to go talk about how damaging sunlight can be.. don’t know, but its definitely not in a park in the plain sunlight
Boss of the Bosses
Boss of the Bosses År sedan
White people are being taught that the sun has harmful rays? Bwahahahahahahahahahaha😂😂😦😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂
Србомбоница År sedan
I think it can cause other cancers also, not just skin cancer
therabbithat År sedan
Said i'd comment on this one since it has fewer views. A reason why your views are dropping might be that more and more people have youtube hooked up to their TVs, so they watch them with their partner/friends. I've watched all your recent vids but you didn't get any views for it because we watched them on the TV sitting on the couch.. so very often, especially with longer vids, 1 view is really 2...
Nick MaGrick
Nick MaGrick År sedan
the whole universe is trying to constantly kill you, even the stuff that keeps you alive But I am a little confused, they didn't talk at all about how the sun is necessary for your health still. Or what the best balance between exposure and protection is, or what it even might be. So pretty disappointing yours just telling people what they already know. Sun exposure causes skin cancer, I think we knew that before we knew what cancer was.
UHFStation1 År sedan
What about UVB? It causes sun burns in high amounts, but is needed for enough good vitamin D. What about the effects of infrared? There are studies that suggest it can help skin heal with less scaring etc.
As Vet
As Vet År sedan
That's why I look so young, I never go outside.
Boss of the Bosses
Boss of the Bosses År sedan
I can't 😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂
Rafi Ashraf
Rafi Ashraf År sedan
Genuinely thought I was watching an ad at the start. No joke.
None of your business
None of your business År sedan
you take me for the ass
wheezkeepee År sedan
Is this proof that we are actually not from around here? We haven't evolved to cope with this star.
Boss of the Bosses
Boss of the Bosses År sedan
dePa År sedan
Doesnt the benefits outwiegh the problems that are mentiond in the video from UV-light. Our body knows how to take care of that kind of damage. Right?
TehNetherlands 8 månader sedan
​@Boss of the Bosses You must be dumb and uneducated if you reject the mountains of scientific evidence. Do you understand the basic principles behind ionizing radiation? UV is a form of ionizing radiation.
Boss of the Bosses
Boss of the Bosses År sedan
They got you feeding in to this too rotdf!!
Carl Does Music
Carl Does Music År sedan
Old people have perfect butts. Deep.
49metal År sedan
So, can this effect manifest at certain concentrations of longer EM wavelengths, like visible light and, you know, radio? (Asking for a friend.)
Boss of the Bosses
Boss of the Bosses År sedan
Kelly Mcgrath
Kelly Mcgrath År sedan
thymine thymine dimers
Kelly Mcgrath
Kelly Mcgrath År sedan
called it
Abi År sedan
Sunscreen is called sunscreen because it's a sunscreen....
Boss of the Bosses
Boss of the Bosses År sedan
Coughing 😝
Max Mustermann
Max Mustermann År sedan
Yeah but its also very helpfull you can kill every bakterie/virus with it. Its used to desinfekt water and kill every bakterie. Bakterias cant protect them from uv light.
Jim Johnson
Jim Johnson År sedan
Jim Johnson
Jim Johnson År sedan
@Србомбоница Get your SUNSHINE 🌞 ALL DAY
Србомбоница År sedan
@Jim Johnson 15 minutes is enough...,you can be outside but sunbathing is not healthy
Jim Johnson
Jim Johnson År sedan
@Србомбоница Caucasians need Sunshine 🌞 too.
Србомбоница År sedan
for a white person 15 minutes in shade is enough
C C År sedan
It puts the sunscreen on it's skin, or else it gets the hose again.
Puppetboy Miguel
Puppetboy Miguel År sedan
Hey Veritasium, "ha, ha, ha, ha, ha" I love this intensifying aging. It is really normal!
Clark Engelbert
Clark Engelbert År sedan
This information is pure garbage. UV light is critical for health. Google Dr. Jack Kruse.
Econael År sedan
People don't get enough Vitamin D. They should use less sunscreen, not more.
tannerchase19 År sedan
welders beware, yikes
It's the fox!
It's the fox! År sedan
There is a lot of factual confusion and sunscreen promotion here. And its use except in hazardous occupations should be discouraged as it is bad for you and especially the environment. Its like recycling; instead of consuming a lot of plastic and then throwing it in a recycling bin, cut down on your consumption of plastics.
It's the fox!
It's the fox! År sedan
Avoiding sunlight completely however causes depression, sleep disturbances and causes certain types of skin cancer (lack of UVB exposure coupled with certain mutagenic chemicals in sunscreens). So avoiding the sun is also bad, find the golden middle expose moderately, not go out for 5 hours and cake yourself in sunscreen.
Sosa Designer
Sosa Designer År sedan
DO black people need sun screen?
Just a fish
Just a fish År sedan
did she just say uncalled pyrimidine dimers?
The Watcher
The Watcher År sedan
Your skin (system) absorbs everything in your sunscreen, but let's not get into the science of that risk. People have been living with the sun for millennia. Sunscreen has been around a minute fraction of that time. Don't let marketing campaigns to sell sunscreen skew your perception of the sun.
chrism3784 År sedan
Then why we evolve millions of years under the sun? We need some sunlight
Myron Gaines
Myron Gaines År sedan
chrism3784 because we lived in caves and mostly stayed out of the sun, why do you think Africans have such dark skin? It’s protection from uv damage
Benjamin Newlon
Benjamin Newlon År sedan
Well I guess ultra-violet is ultra-violent
Boss of the Bosses
Boss of the Bosses År sedan
You can avoid skin cancer by putting a brown paper bag over your head. ✔
Boss of the Bosses
Boss of the Bosses År sedan
White ppl are so crazy😂😂😂😂😂😂😂😂😂😂😂😂😂😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝😝
Deutscher Soldat
Deutscher Soldat År sedan
Can you pls make a video or a comment about those black light bulbs? are they dangerous or do any harm?
Montay Jordan
Montay Jordan År sedan
vitamin E and C protects the skin against the sun so if you got proper nutrition you can take advantage of the good effects of the sun all while negating any possible bad effects and sunscreen is not the answer it has toxic chemicals that are simply unnecessary for them to be put on you skin sunscreen causes cancer itself and on top of that if you would fast regularly it will protect you against cancer feeds on glucose and fasting depletes the body of glucose thus make cancer literally inhabitable in the body and fasting also help repair and protect DNA and fasting is anti aging
Boss of the Bosses
Boss of the Bosses År sedan
There's nothing harmful about the sun. The sun makes flowers grow. This video is for caucasian ppl.
YG År sedan
3:17 Longer wave= less energy. I dont think what shes saying is correct
TheRedstoneHive År sedan
Yes it is correct.
YG År sedan
Man, how can you say UV isnt ionizing?
Samy_06 2 år sedan
But then again, it's a double edged sword. We can't live without UVA and UVB even though they do more harm than good apparently. We can not avoid the sun otherwise we would all have vitamin D deficiency which is really bad and could cause cancer on its own. This is not only a double edged sword but a vicious circle, avoiding sunlight could in time lead to vitamin D deficiency which if left untreated could lead to cancer, and being overexposed to sunlight is harmful since it damages our skin and slows down our immune system. What should be done in this case ? Sunscreen is clearly not the best solution ...
Sunny shah
Sunny shah 2 år sedan
But Sun is necessary for life to exist, why is sun light so bad for Humans
Boss of the Bosses
Boss of the Bosses År sedan
Its not bad for all humans lol
Malik Bagwala
Malik Bagwala 2 år sedan
Good thing i rarely go out.. #CodeAndDieYoung
Preet Karan
Preet Karan 2 år sedan
Butt : Where the sun doesn't shine 😂
Ian Random
Ian Random 2 år sedan
As someone that suffers from a condition exacerbated by UV I'd like to make one point. The windshield is a sandwich with plastic in the middle that better blocks uv than the single plate glass used on all the other windows. I'd always feel better in the car when driving northbound and that tidbit helped me manage my disorder.
Shraddha R
Shraddha R 2 år sedan
This is so so so so cool
mykevelli 2 år sedan
One of the things I've always wondered is if the same rays that cause skin damage are the ones that tan our skin. Is it possible to separate the two and come up with some form of safe tanning or are they literally two effects of the same thing?
Lünkel 2 år sedan
They are kinda the same thing. Both are caused by exposure to UV radiation, however the damage is a direct result of it and tanning is a defense mechanism of your body against UV. That's why people with dark skin sometimes have to take vitamin D supplements when they live further away from the equator, their skin blocks out too much UV.
GigglySam Entz
GigglySam Entz 2 år sedan
In the UK, we get so little UV that sunlight paranoia is bad for our health XD
David 2 år sedan
In the winter maybe, but we get enough in the summer to completely burn the average person to a crisp.
Alex Ogea
Alex Ogea 2 år sedan
the girl talking about skin cancer sounds just like Rachel Ray. And she kind of looks like her that much but she looks like she could be a young Rachel Ray, anybody else notice this? LOLOLOLOL
Jacob Dunlop
Jacob Dunlop 2 år sedan
Lul I didn’t know Elon musk had a yt channel
Young Lucy
Young Lucy 2 år sedan
At 3:15, isn't that Anatoli Bugorski, the guy who put his head in an active particle accelerator? Seems like a mistake of his image if it is.
Daniel Raj
Daniel Raj 2 år sedan
4:17 physics girl?
George Law
George Law 2 år sedan
Yeah, I recognized her too!
We Deserve Better
We Deserve Better 2 år sedan
Humans in UV... look like the folks from the Avatar movie.
Steven Brener
Steven Brener 2 år sedan
Doesn't sunscreen cut out vitamin D production?
Tony Moon
Tony Moon 2 år sedan
Someone get that chick a glass of water!
ChiboGoro 2 år sedan
Cara Santa Maria is cute.
Poopoo 2 år sedan
Her voice makes me want to clear my throat.
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