Can You Wash Off Vitamin D? Here’s The Science

Can You Wash Off Vitamin D? Here’s The Science


Can we wash off vitamin D?
Hi guys I’m James Spurgeon and if your watching
this you’re likely already familiar with the
concept that when our skin is exposed to sunlight,
it synthesizes vitamin D. But, you may have
also read on health blogs that if you shower
after laying out in the sun you will wash
off this vitamin D. So let’s run through this.
First off, you don’t make vitamin D in the
oils on TOP of your skin, which some people
claim.
Some say that if you shower right after you
lay out in the sun you’ll wash off these beneficial
oils and therefore wash off vitamin D. That’s
now how it works.
So how does it work?
When you’re outside, more so through the hours
of 11am – 3pm, UVA and UVB light penetrate
exposed skin, assuming you’re not wearing
sunscreen.
But what layers of the skin do they penetrate.
If you look at this picture you can see there’s
these top two layers – the stratum corneum
and the stratum lucidum.
Now those are dead skin layers, which could
be layers you could wash off while showering.
So if vitamin D were made here maybe these
people would have a point.
Vitamin D is made in living cells.
If you look deep within the epidermis you
will see the stratum spinosum and stratum
basale, this is the basal layer.
These are deep within the epidermis and are
living cells.
The top two skin layers don’t have DNA, they
don’t have a nucleus – they’re dead.
They’re not making vitamin D. UVB light penetrates
deep into the epidermis – the stratum spinosum
and the basal layer beneath that.
UVA can also mildly make vitamin D and it
can penetrate deep into the DERMIS.
So it’s not possible to wash this stuff off
because it’s being made deep within the epidermis.
The other thing to consider is, these vitamin
D precursors being made in the skin aren’t
ALWAYS just staying in the skin.
Sometimes they’re being delivered to the bloodstream
to be converted to the active form of vitamin
d and then delivered to various areas of the
body that need vitamin d most.
So to summarize, you don’t make vitamin D
in the oils on top of your skin, you don’t
make it in the dead skin layer that could
possibly be washed off while you shower.
It’s made deep within the epidermis in living
cells.
It’s not possible to wash this off.
If you have any requests for other videos
you would like me to cover in the future,
just leave them in the comment section!

13 thoughts on “Can You Wash Off Vitamin D? Here’s The Science

  • Thanks a lot for info buddy I have three more questions please do tell
    1)Can I go into 12:00 pm sun for 30 minutes to get enough vitamin D for a month I live in India sun is intense here and I am a bit brown in complexion the way Indians are
    2)Can I take shower with soap after half hour of sun exposure and not loose any D3
    3)if I expose to sun light it will lead to tanning and less absorbtion eventually so please suggest me a good soap to get rid of tanning
    Thanks a lot waiting for your response

  • So how do you explain the study where surfers and skaters had only 30(whatever measurement) while a tribe in africa had 50? Is there another factor that could be responsible for the difference?

  • it would be that having wet the skin a long time, will it remove the vitamin D? and that´s maybe the reason for the skaters and surfers, or that is not possible on that way. Sorry for my english, and I don´t like to stay tanned, I like to have white skin, how can I get vitamin D without tanning?, and free of suplements, because there´s anothers benefits from sun exposure.

  • Do you know how long we can store vitamin D? for example if i have a level of 70nmol/L in september, how low will my levels drop to at the end of winter?

  • thats interesting, i had heard the opposite. do skin oils offer any protection or happily shower twice a day if on holidays in a hot country?

Leave a Reply

Leave a Reply

Your email address will not be published. Required fields are marked *