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Overview UV and vitamin D

simple graphic

Consensus

  • UV radiation at the ground consists mainly of UVA, some UVB, and a tiny amount of UVC
  • Sun, sunbeds/tanning beds/some sun bulbs contain both UVA and UVB radiation
  • UVA (315 -400 nm) radiation induces pigment tanning within seconds of UVA and light exposure
    • UVA tanning fades within 2 hours and does not increase melanin in skin
  • UVB (280-315 nm) radiation
    • induces vitamin D synthesis
    • delayed tanning (increases melanin in skin after several days)
    • is mainly responsible for sunburn (erythema), photoaging, photoimmunosuppression
  • Windows (glass) block UVB radiation
  • Modern sunscreens block UVB and UVA, but some of them block UVA poorly or are photo-unstable in this region
  • There has been an increase in melanoma incidence in recent years
  • Tanning beds produce higher levels of UVA radiation than the sun - even at the equator
  • UVB radiation, but not UVA radiation, induces melanoma in genetically modified animals
    • The newest epidemiological evidence suggest that UVA as well as UVB is associated with human melanoma
  • Epidemiological studies published over the last years demonstrated the association between sunbed use and melanoma.
  • Many countries restrict the amount of UVB (vitamin D) from tanning beds (due to mouse study)
  • UVB decreases faster than UVA when far from equator or winter season

Confusion/Disagreement

Sunburn (Erythema), cataracts, and development of skin cancer are related mostly to UVB radiation.
Ban all people under age 18 from using tanning beds

Spectrum

from Mercola

  • Visible: 450 (deep violet) to 700 (deep red)
  • UVA: a small amount gets thru the atmosphere (tan)
  • UVB: a tiny amount gets thru the atmosphere (Vitamin D)
  • UVC: none gets thru the atmosphere

UVB and UVA are very different

UVB UVA
Wavelength 280-315 315-400?
Tan Nope Tan
Vitamin D Vitamin D nope
Sun Screen blocked by sunscreen varies
Tanning salon varies widely
with tubes used		 5X more intense
than sun
Thru glass
eye and window		 blocked by glass UVA passed by some glass
may destroy some vitamin D
Birds can see nope Many birds can see UVA
Reptile can see Yes reptile Yes reptile
Wrinkle Yes ??
Bleach furniture ?? Yes
Skin Cancer controversy controversy

UV: Different Spectra: UVB = Vitamin D, UVA = Pigmentations

From Tanning Guru
UV: vitamin D, tan @ is.gd/UV_VitD

Hypothesis: UVA decreases vitamin D: many hints

Tanning

25+ VitaminDWiki pages with TANNING in the title

This list is automatically updated

Items found: 26
Title Modified
Tanning beds and Vitamin D - many studies 19 Apr, 2024
Increase your vitamin D from the sun by wearing a tan-through instead of standard shirt 20 May, 2019
Multiple Sclerosis much less likely for children who are thin and tanned - April 2017 23 Apr, 2017
3 tanning sessions raised vitamin D levels about 4 nanograms for about 4 weeks – July 2016 05 Jan, 2017
68 percent got vitamin D above 40 ng by regular use of tanning bed - July 2013 21 Jul, 2016
Tanning bed twice a month slightly increased vitamin D levels during the winter – RCT Nov 2015 21 Jul, 2016
Twins, no tan, winter, and smoking all associated with low levels of vitamin D during pregnancy – Jan 2013 30 Jun, 2016
Getting a tan does not mean that you are getting vitamin D 25 May, 2016
Tanning potential predicts risk of Prostate Cancer in Blacks – Nov 2014 02 Jan, 2015
Moscow prison to install tanning beds - Nov 2010 08 Mar, 2014
Use of tanning beds would reduce associated deaths by 10X – Oct 2011 18 Nov, 2013
4 uses of tanning beds per year did not reduce rate of internal cancers – Oct 2013 16 Oct, 2013
Tanning beds UVB vary by 4X 16 Oct, 2013
UVA from some tanning beds and most windows decrease vitamin D blood levels – March 2012 16 Jul, 2013
Tanning bed not improve vitamin D levels for a type of pancreatitis – RCT Sept 2011 16 Jul, 2013
Texas company claimed tanning beds prevent cancer – had to pay 142,000 dollar fine – March 2013 13 Mar, 2013
Vitamin D from phototherapy lamps, tanning beds, and the sun – Jan 2012 06 Mar, 2013
Tanning bed, like vitamin D supplements, has non-linear relationship with blood levels – Dec 2011 15 Jan, 2013
Indoor tanning not apparently associated with skin cancer – Feb 2012 06 Dec, 2012
Hypothesis – you will get the most vitamin D from sun if you do not tan 15 Aug, 2011
Most people have pale palms which do not tan 30 Jan, 2011
Miss Ohio Teen USA on responsible tanning 29 Sep, 2010
Indoor tanning neither reliable nor advisable source of vitamin D – Sept 2010 28 Sep, 2010
Dermatologists should not tan – June 2010 25 Jun, 2010
Study Suggests Indoor Tanning Boosts Chances of Melanoma 27 May, 2010
Tanning from Wikipedia 16 May, 2010

Measure UV

UV thru glass

No UVB (Vitamin D) gets thru, but most UVA (Tan) gets thru

uv window glass.jpg

Sunscreens

Increased sunscreen ==> increased melanoma

Melanoma and suncreens Time line -2010

Red = sunlight; other lines = amount of light filtered thru sunscreens

Image

Chart by Wagner and Hollis, downloaded from Grassroots April 2010 – video expected June

UV Other

Image

  • Elderly Skin generates less Vitamin D

Elderly skin generates less vitamin D

See also web

Image

Associations with the category Ultraviolet

Noontime sun 56, Top news 23, Multiple Sclerosis 21, Skin 18, Cancer 18, Virus 15, Cancer - Skin 14, Veterinary 11, Psoriasis 9, Pregnancy 6, Deficiency 5, Vision 5, Mortality 5, Cancer - Colon 5, Vitamin D Receptor 5, Vitamin D Far from equator 5, Cancer - Breast 5, Cancer - Lymphoma 5, Europe 5, Food sources5, Cardiovascular 4, Books, videos 4, Intervention 4, Gut 4, Immunity 4, Infant-Child 4, Genetics 4, Seniors 4, Obesity 4, Predict Vitamin D 3, Cancer - Other 3, Skin - Dark 3, Middle East 3, Metabolic Syndrome 3, CYP27B1 3, Overviews 2, Cancer - Prostate 2, Cancer - Bladder 2, Conference 2, High Risk 2, Shut-in 2, Orient 2, How much Vitamin D 2, Breathing 2, Kidney 2, Forms 2 (as of Nov 2023)

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Summary of Associations

Associated category Associations
Virus
15
Noontime sun and D
63
Cancer
19
Obesity
4
Top news
23
Mortality and D
5
Deficiency of Vitamin D
6
Pregnancy
6
Cardiovascular
6
Psoriasis
9
Books, videos on Vitamin D
6
Cancer - Colon
5
Cancer - Prostate
2
Cancer - Skin
14
Vitamin D Receptor
5
Vitamin D Far from equator
5
Cancer - Other
3
Cancer - Breast
5
Meta-analysis of Vitamin D
4
Veterinary and Vitamin D
13
Cancer - Bladder
2
Multiple Sclerosis
22
Intervention
4
Skin - Dark
3
Skin
18
Gut
4
Immunity
4
Vision
5
Cancer - Pancreatic
2
Cancer - Lymphoma
5
Autoimmune
2
Infant-Child
4
Vitamin D in Europe
5
Conference
2
High Risk
2
Shut-in
2
Orient
2
Genetics
4
Middle East
3
Metabolic Syndrome
3
Video page names
2
Food sources for Vitamin D
5
Seniors
5
AI
2
Overviews
2
How much Vitamin D
2
Associations
2
Predict Vitamin D
3
Breathing
2
Kidney
2
Forms of Vitamin D
2
CYP27B1
3
Vitamin D in Australia and New Zealand
2

Results

15 pages in both categories: UV and Vitamin D + Virus

Page Hits Categories Major change
COVID and other Virus fought by UV - many studies 12458 UV and Vitamin D, Virus 03 Mar, 2023
Model discovered: More UV, less COVID (many excellent charts) – Sept 2022 586 UV and Vitamin D, Virus 12 Sep, 2022
COVID hospital deaths reduced 2X by 8 days of UVB – pilot RCT May 2022 2238 UV and Vitamin D, Intervention, Virus 05 Jun, 2022
UV and COVID: Prevention and perhaps treatment 513 UV and Vitamin D, Virus 30 May, 2022
11 percent fewer COVID-19 deaths if lockdowns had allowed sunshine – Nov 2021 2448 UV and Vitamin D, Virus 25 Nov, 2021
COVID-19 deaths - 30 percent fewer if high UVA (US, etc) – Aug 2021 1329 UV and Vitamin D, Virus 30 Sep, 2021
4th highest county in the US has a very low COVID-19 rate (high UV, high vitamin D) 3266 UV and Vitamin D, Virus 29 Sep, 2021
COVID-19 onset strongly associated with latitude in Europe (Vitamin D)– Jan 21, 2021 4010 UV and Vitamin D, Virus 22 Jan, 2021
UV provides the best explanation of COVID-19 variation in Italy (74 pcnt) – Nov 2020 3839 UV and Vitamin D, Virus 05 Dec, 2020
More UVB, less Coronavirus – including SARS-CoV-2 – Aug 2020 1265 UV and Vitamin D, Virus 30 Aug, 2020
Far fewer COVID-19 deaths in the summer (Europe, Canada) 1911 UV and Vitamin D, Virus 30 Aug, 2020
Less COVID-19 at high altitude due to more Vitamin D or other possible reasons – July 2020 3064 UV and Vitamin D, Virus 22 Aug, 2020
High-altitude Cusco, Peru has far lower rate of COVID-19 than others (high UVB and Vitamin D) - June 2020 2847 UV and Vitamin D, Virus 28 Jun, 2020
Influenza Virus aerosols killed by 10 minutes of sunlight (far faster if use UV-C) – Nov 2019 2798 UV and Vitamin D, Virus 16 Feb, 2020
Ultraviolet light kills cold and flu viruses, and generates Vitamin D in the skin 8509 Breathing, UV and Vitamin D, Virus 06 Jan, 2019

63 pages in both categories: UV and Vitamin D + Noontime sun and D

Page Hits Categories Major change
Getting Vitamin D into your blood and cells 71 Food sources for Vitamin D, Noontime sun and D, UV and Vitamin D, Forms of Vitamin D, How, when to take Vit. D, Top news, Fortification with Vitamin D, Calcitriol , Calcidiol 29 Jan, 2025
Less UV means 2X more Breast Cancer – June 2011 Noontime sun and D, UV and Vitamin D, Cancer - Breast 07 Jan, 2025
Less UV associated with more dementia - Jan 2025 16 Noontime sun and D, UV and Vitamin D, Cognitive 07 Jan, 2025
Importance of Light, UVB, and Vitamin D to Health - videos by Max Gulhane MD 2024 61 Noontime sun and D, UV and Vitamin D, Books, videos on Vitamin D 22 Sep, 2024
Many 2024 videos on importance of Sunlight, UVB, and Vitamin D to Health - Noontime sun and D, UV and Vitamin D 22 Sep, 2024
Embrace the Sun – benefits of the sun (Nitric Oxide etc.) – book June 2018 Noontime sun and D, UV and Vitamin D, Books, videos on Vitamin D, Cancer, Top news 05 Aug, 2024
Seniors get about 4X less vitamin D from the sun or UVB 4 Seniors, Noontime sun and D, UV and Vitamin D, AI 19 Apr, 2024
Tanning beds and Vitamin D - many studies 10 Noontime sun and D, UV and Vitamin D 19 Apr, 2024
Your body needs sunshine for health - even Australia agrees 17 Noontime sun and D, UV and Vitamin D 09 Apr, 2024
Does Less Sun mean More Disease 199923 Noontime sun and D, UV and Vitamin D, Books, videos on Vitamin D, Video page names, Video page names 15 Jul, 2023
Light improves health by more than just Vitamin D - April 2022 562 Noontime sun and D, UV and Vitamin D 16 Apr, 2023
Vitamin D from the sun reduces the risk of internal cancers, but increases some skin cancers – Nov 2021 1616 Noontime sun and D, UV and Vitamin D, Cancer - Skin 05 Feb, 2023
3.3 X more likely to be Vitamin D deficient if wear long-sleeves – Oct 2022 666 Noontime sun and D, UV and Vitamin D 07 Oct, 2022
Sun is better than UV, which is better than Vitamin D 7563 Noontime sun and D, UV and Vitamin D 28 Mar, 2022
Skin Aging and Vitamin D - many studies Noontime sun and D, UV and Vitamin D, Skin 08 Feb, 2022
UV, sunshine, and vitamin D (87 charts) - Holick March 2013 16766 Noontime sun and D, UV and Vitamin D, Top news 11 Jan, 2022
Mutiple Sclerosis half as likely in children spending 30 to 60 minutes per day in the sun – Dec 2021 1898 Noontime sun and D, UV and Vitamin D, Multiple Sclerosis 11 Dec, 2021
Sunburning reduced by 200,000 IU of Vitamin D – RCT April 2017 Noontime sun and D, UV and Vitamin D, Intervention, Skin 28 Nov, 2021
Vitamin D produced by hands and face is 8X more than elsewhere – Feb 2018 4293 Noontime sun and D, UV and Vitamin D, Top news 21 May, 2021
Most sunscreens actually increase the growth of skin cancer - May 2010 17773 Noontime sun and D, UV and Vitamin D, Cancer - Skin 26 Apr, 2021
The Greatest Public Health Mistake of the 20th Century (sunscreen block Vitamin D) - 2017 4909 Noontime sun and D, UV and Vitamin D, Cancer - Skin 26 Apr, 2021
Vitamin D from the sun without the heat (silver-coated plexiglass) 5389 Noontime sun and D, UV and Vitamin D, Top news 11 Jan, 2021
Book: Sunlight, UV, Vitamin D and Receptor, Skin and other Cancers - Dec 2020 2598 Noontime sun and D, UV and Vitamin D, Books, videos on Vitamin D, Cancer - Colon, Cancer - Prostate, Cancer - Skin, Cancer, Vitamin D Receptor 09 Dec, 2020
Health benefit of Sunlight is more than Vitamin D in the blood - many studies 4758 Noontime sun and D, UV and Vitamin D, Top news 13 Aug, 2020
Parkinson’s patients 50X less likely to get even a little sun– meta-analysis Jan 2019 5291 Noontime sun and D, UV and Vitamin D, Parkinson, Meta-analysis of Vitamin D 29 Jan, 2019
Spring sunshine in snowy Finland normalized Vitamin D levels to 36 nanograms – 2017 3997 Noontime sun and D, UV and Vitamin D 13 Mar, 2018
Health benefits of non-burning exposure to UV light – Jan 2017 7875 Noontime sun and D, UV and Vitamin D 14 Nov, 2017
The sun provides more health benefit than vitamin D – Dr. Lucas podcast – May 2015 6748 Noontime sun and D, UV and Vitamin D 31 Oct, 2017
UVB annual US - 1978-2014 5062 Noontime sun and D, UV and Vitamin D 12 Jun, 2017
Vitamin D and Sun conference – Germany June 2017 5016 Noontime sun and D, UV and Vitamin D, Multiple Sclerosis, Vitamin D in Europe, Conference 28 May, 2017
Each hour of outdoor work in India increased vitamin D levels by 2 nanograms – March 2017 3618 Noontime sun and D, UV and Vitamin D 18 May, 2017
Vitamin D protects DNA against UV skin damage – 5 studies 2012-2013 10201 Noontime sun and D, UV and Vitamin D, Cancer - Skin, Top news 27 Jan, 2017
3 tanning sessions raised vitamin D levels about 4 nanograms for about 4 weeks – July 2016 5419 Noontime sun and D, UV and Vitamin D 05 Jan, 2017
The risks and benefits of sun exposure – Holick Oct 2016 8646 Noontime sun and D, UV and Vitamin D 05 Jan, 2017
Heliotherapy treated children – 1926 8104 Noontime sun and D, UV and Vitamin D 29 Nov, 2016
Tanning bed twice a month slightly increased vitamin D levels during the winter – RCT Nov 2015 4196 Noontime sun and D, UV and Vitamin D 21 Jul, 2016
Large variability in response to UV (more than response to oral Vitamin D) – March 2016 7440 Noontime sun and D, UV and Vitamin D 22 Jun, 2016
Many wavelengths of light provide health benefits, not just UV – March 2016 9270 Noontime sun and D, UV and Vitamin D 19 Mar, 2016
Benefits of sun are more than vitamin D – 2008 7781 Noontime sun and D, UV and Vitamin D 11 Aug, 2015
Opinion: sun better than UV better than vitamin D 18206 How much Vitamin D, Noontime sun and D, UV and Vitamin D 11 Aug, 2015
A wrist-watch which measures UVA plus UVB - should NOT be used to increase vitamin D - June 2014 8504 Noontime sun and D, UV and Vitamin D, Top news 31 Jul, 2015
Even cows need more than 90 minutes in the sun each day – Feb 2012 2214 Veterinary and Vitamin D, Noontime sun and D, UV and Vitamin D 21 Jun, 2015
Less sun means more disease -Grant, Holick, Cannell, et al Feb 2015 11255 Noontime sun and D, UV and Vitamin D, Health 05 Mar, 2015
Overview Skin and vitamin D 45056 Noontime sun and D, UV and Vitamin D, Overviews, Skin 13 Jan, 2015
For small amounts of sunshine the amount of skin exposed may not matter – Jan 2011 7641 Noontime sun and D, UV and Vitamin D, Skin 13 Jan, 2015
Fewer heart attacks, hip fractures and deaths if more skin cancer – Sept 2013 7557 Noontime sun and D, UV and Vitamin D, Cardiovascular, Mortality and D, Top news, Falls and Fractures 09 Nov, 2014
Hypothesis: Sun provides more than vitamin D – June 2012 7215 Noontime sun and D, UV and Vitamin D, Top news 05 Jun, 2014
Australian shade audits finds UV typically reduced by only 2X to 8X – Jan 2014 8982 Noontime sun and D, UV and Vitamin D 09 Mar, 2014
Use of tanning beds would reduce associated deaths by 10X – Oct 2011 5040 Noontime sun and D, UV and Vitamin D, Cancer - Skin, Cancer, Vitamin D Far from equator 18 Nov, 2013
Air conditioning has not totally canceled the latitude effective in the US yet – July 2013 5749 Noontime sun and D, UV and Vitamin D, Mortality and D 08 Aug, 2013
Dermatologists view of UV radiation and the Skin – June 2013 7338 Noontime sun and D, UV and Vitamin D, Mortality and D, Skin 07 Jun, 2013
UV workshops in New Zealand 8904 Noontime sun and D, UV and Vitamin D 04 May, 2013
Vitamin D from phototherapy lamps, tanning beds, and the sun – Jan 2012 22670 Noontime sun and D, UV and Vitamin D, Vitamin D Far from equator, Top news 06 Mar, 2013
China has documented that less UV results in more cancer – June 2010 7828 Noontime sun and D, UV and Vitamin D, Liver, Cancer - Colon, Cancer - Breast, Cancer - Bladder, Cancer 07 Jan, 2013
Intense UV damages cadaver skin– Oct 2012 4613 Noontime sun and D, UV and Vitamin D, Skin 09 Nov, 2012
Possible DNA damage of skin if vitamin D levels less than 20 nanograms – April 2012 6413 Noontime sun and D, UV and Vitamin D, Skin 09 Nov, 2012
Wear glasses when getting vitamin D from the sun – June 2011 13208 Noontime sun and D, UV and Vitamin D, Vision 17 Oct, 2012
Solar UV Doses of Adult Americans and Vitamin D3 Production – Dec 2011 8493 Noontime sun and D, UV and Vitamin D 06 Oct, 2012
UV every two weeks maintains summer vitamin D level – RCT Oct 2011 6357 Noontime sun and D, UV and Vitamin D 22 Aug, 2012
Metabolic Syndrome reduced 2X after one year of more sunlight - Nov 2011 5397 Noontime sun and D, UV and Vitamin D, Middle East, Metabolic Syndrome 23 Jun, 2012
Is the UVB action spectrum for vitamin D correct – no vitamin D winter - 2010 10306 Noontime sun and D, UV and Vitamin D 07 Apr, 2012
UPF = SPF for clothing 12633 Noontime sun and D, UV and Vitamin D 01 Feb, 2012
Study Suggests Indoor Tanning Boosts Chances of Melanoma 3515 Noontime sun and D, UV and Vitamin D 27 May, 2010

19 pages in both categories: UV and Vitamin D + Cancer

Page Hits Categories Major change
Embrace the Sun – benefits of the sun (Nitric Oxide etc.) – book June 2018 Noontime sun and D, UV and Vitamin D, Books, videos on Vitamin D, Cancer, Top news 05 Aug, 2024
23 Cancers in the US are associated with low UVB - Grant April 2024 2 UV and Vitamin D, Cancer 17 May, 2024
Non-Hodgkin Lymphoma 20 percent more likely if low UV – meta-analysis April 2019 2682 UV and Vitamin D, Cancer, Meta-analysis of Vitamin D, Cancer - Lymphoma 01 Apr, 2024
Some cancer rates are reduced when live at high altitude, but other cancers increase after a few generations – March 2021 1284 UV and Vitamin D, Cancer 27 Mar, 2021
Book: Sunlight, UV, Vitamin D and Receptor, Skin and other Cancers - Dec 2020 2598 Noontime sun and D, UV and Vitamin D, Books, videos on Vitamin D, Cancer - Colon, Cancer - Prostate, Cancer - Skin, Cancer, Vitamin D Receptor 09 Dec, 2020
Getting little UV is associated with 15 types of Cancer – Jan 2012 5468 UV and Vitamin D, Cancer - Colon, Cancer - Breast, Cancer - Bladder, Cancer - Pancreatic, Cancer, Cancer - Lymphoma, Cancer - Lung 26 Aug, 2016
A review of the evidence regarding the solar ultraviolet-B-vitamin D-cancer hypothesis - Oct 2012 10402 UV and Vitamin D, Cancer, Top news 08 Jan, 2016
Less intestinal cancer in mice if add vitamin D, but even less with ultraviolet light – June 2014 5952 UV and Vitamin D, Cancer 05 Jun, 2014
Cancer incidence in 87 countries is related to food, smoking, alcohol, GDP, and UVB - Jan 2014 4214 UV and Vitamin D, Cancer 08 Jan, 2014
Use of tanning beds would reduce associated deaths by 10X – Oct 2011 5040 Noontime sun and D, UV and Vitamin D, Cancer - Skin, Cancer, Vitamin D Far from equator 18 Nov, 2013
4 uses of tanning beds per year did not reduce rate of internal cancers – Oct 2013 3222 UV and Vitamin D, Cancer 16 Oct, 2013
Solar UVB reduces Cancer Risk – Grant, Jan 2013 11299 UV and Vitamin D, Cancer 02 Oct, 2013
More UVB is associated with less cancer – study of 450,000 people – April 2012 4710 UV and Vitamin D, Cancer 13 Apr, 2013
Some childhood cancer 30% less likely in parts of California with more UVB – April 2013 3940 UV and Vitamin D, Cancer, Cancer - Lymphoma 13 Apr, 2013
China has documented that less UV results in more cancer – June 2010 7828 Noontime sun and D, UV and Vitamin D, Liver, Cancer - Colon, Cancer - Breast, Cancer - Bladder, Cancer 07 Jan, 2013
The sun appears better at reducing incidence of some cancers than vitamin D – Dec 2012 4354 UV and Vitamin D, Cancer - Colon, Cancer - Breast, Cancer - Prostate, Cancer, Cancer - Lymphoma 17 Dec, 2012
Lack of solar UVB in US is associated with some Cancers - 2006 3789 UV and Vitamin D, Mortality and D, Cancer 28 Dec, 2011
Some cancer due to low UV – Grant – April 2010 2919 UV and Vitamin D, Cancer 13 Oct, 2011
Grassroots PDF and video updates May and June 2010 3533 UV and Vitamin D, Pregnancy, Books, videos on Vitamin D, Cancer - Colon, Cancer 17 May, 2010

4 pages in both categories: UV and Vitamin D + Obesity

23 pages in both categories: UV and Vitamin D + Top news

Page Hits Categories Major change
Getting Vitamin D into your blood and cells 71 Food sources for Vitamin D, Noontime sun and D, UV and Vitamin D, Forms of Vitamin D, How, when to take Vit. D, Top news, Fortification with Vitamin D, Calcitriol , Calcidiol 29 Jan, 2025
Embrace the Sun – benefits of the sun (Nitric Oxide etc.) – book June 2018 Noontime sun and D, UV and Vitamin D, Books, videos on Vitamin D, Cancer, Top news 05 Aug, 2024
UV, sunshine, and vitamin D (87 charts) - Holick March 2013 16766 Noontime sun and D, UV and Vitamin D, Top news 11 Jan, 2022
Colorado has the best UV (and thus best health) in the US 8104 UV and Vitamin D, Top news 29 Sep, 2021
Vitamin D produced by hands and face is 8X more than elsewhere – Feb 2018 4293 Noontime sun and D, UV and Vitamin D, Top news 21 May, 2021
Vitamin D from the sun without the heat (silver-coated plexiglass) 5389 Noontime sun and D, UV and Vitamin D, Top news 11 Jan, 2021
Health benefit of Sunlight is more than Vitamin D in the blood - many studies 4758 Noontime sun and D, UV and Vitamin D, Top news 13 Aug, 2020
Poor responses to UV and Vitamin D were correlated to just 4 poor genes – June 2019 4362 UV and Vitamin D, Top news, Predict Vitamin D 19 Jul, 2019
Clinically Isolated Syndrome progresses to Multiple Sclerosis, unless UVB treatments – RCT Dec 2017 3780 UV and Vitamin D, Multiple Sclerosis, Top news 17 Dec, 2017
Vitamin D protects DNA against UV skin damage – 5 studies 2012-2013 10201 Noontime sun and D, UV and Vitamin D, Cancer - Skin, Top news 27 Jan, 2017
Lack of UV 20X more associated with MS than any other variable – Dec 2010 4958 UV and Vitamin D, Multiple Sclerosis, Top news 15 Apr, 2016
Low UVB (thus low Vitamin D) is linked to many diseases – Grant Jan 2016 7853 UV and Vitamin D, Top news 10 Jan, 2016
A review of the evidence regarding the solar ultraviolet-B-vitamin D-cancer hypothesis - Oct 2012 10402 UV and Vitamin D, Cancer, Top news 08 Jan, 2016
UVB added in classroom reduced cavities, increased height, increased academics. etc 15654 UV and Vitamin D, Dental, Intervention, Top news, Infant-Child 21 Dec, 2015
Psoriasis decreased and vitamin D increased with home UV lamp – March 2015 6290 UV and Vitamin D, Psoriasis, Top news 19 Dec, 2015
UVB produced 8X more vitamin D as solar UV – July 2012 10055 UV and Vitamin D, Top news 11 Aug, 2015
A wrist-watch which measures UVA plus UVB - should NOT be used to increase vitamin D - June 2014 8504 Noontime sun and D, UV and Vitamin D, Top news 31 Jul, 2015
Fewer heart attacks, hip fractures and deaths if more skin cancer – Sept 2013 7557 Noontime sun and D, UV and Vitamin D, Cardiovascular, Mortality and D, Top news, Falls and Fractures 09 Nov, 2014
UVA decreased serum levels of vitamin D - RCT Oct 2012 11038 UV and Vitamin D, Top news 21 Aug, 2014
Hypothesis: Sun provides more than vitamin D – June 2012 7215 Noontime sun and D, UV and Vitamin D, Top news 05 Jun, 2014
UV decreases Multiple Sclerosis via cis-urocanic acid (and via vitamin D) – June 2013 10818 UV and Vitamin D, Multiple Sclerosis, Top news 28 Jun, 2013
Vitamin D from phototherapy lamps, tanning beds, and the sun – Jan 2012 22670 Noontime sun and D, UV and Vitamin D, Vitamin D Far from equator, Top news 06 Mar, 2013
Top UK soccer coach installed vitamin D booths in his club – Dec 2012 6467 UV and Vitamin D, Sports and Vitamin D, Top news, Vitamin D in Europe 21 Dec, 2012

5 pages in both categories: UV and Vitamin D + Mortality and D

6 pages in both categories: UV and Vitamin D + Deficiency of Vitamin D

6 pages in both categories: UV and Vitamin D + Pregnancy

6 pages in both categories: UV and Vitamin D + Cardiovascular

9 pages in both categories: UV and Vitamin D + Psoriasis

6 pages in both categories: UV and Vitamin D + Books, videos on Vitamin D

5 pages in both categories: UV and Vitamin D + Cancer - Colon

2 pages in both categories: UV and Vitamin D + Cancer - Prostate

14 pages in both categories: UV and Vitamin D + Cancer - Skin

Page Hits Categories Major change
Vitamin D from the sun reduces the risk of internal cancers, but increases some skin cancers – Nov 2021 1616 Noontime sun and D, UV and Vitamin D, Cancer - Skin 05 Feb, 2023
Most sunscreens actually increase the growth of skin cancer - May 2010 17773 Noontime sun and D, UV and Vitamin D, Cancer - Skin 26 Apr, 2021
The Greatest Public Health Mistake of the 20th Century (sunscreen block Vitamin D) - 2017 4909 Noontime sun and D, UV and Vitamin D, Cancer - Skin 26 Apr, 2021
Book: Sunlight, UV, Vitamin D and Receptor, Skin and other Cancers - Dec 2020 2598 Noontime sun and D, UV and Vitamin D, Books, videos on Vitamin D, Cancer - Colon, Cancer - Prostate, Cancer - Skin, Cancer, Vitamin D Receptor 09 Dec, 2020
Hypothesis: UVA through window glass decreases vitamin D - 2009 10043 Deficiency of Vitamin D, UV and Vitamin D, Cancer - Skin 25 Jun, 2018
UVB improvements to Vitamin D receptor appear to improve melanoma survival – Oct 2017 3829 UV and Vitamin D, Cancer - Skin, Vitamin D Receptor 09 Oct, 2017
Vitamin D protects DNA against UV skin damage – 5 studies 2012-2013 10201 Noontime sun and D, UV and Vitamin D, Cancer - Skin, Top news 27 Jan, 2017
UVA causes skin cancer, perhaps UVB (Vitamin D) prevents skin cancer – Jan 2017 13432 UV and Vitamin D, Cancer - Skin 27 Jan, 2017
Skin cancer (in mice) due to UV was prevented by vitamin D (active, topical) – June 2016 9726 UV and Vitamin D, Cancer - Skin 07 Jan, 2017
UV – adverse and beneficial effects – review Nov 2014 8131 UV and Vitamin D, Cancer - Skin 17 May, 2015
UV Radiation and the Skin June 2013 5511 UV and Vitamin D, Cancer - Skin 28 Nov, 2013
Use of tanning beds would reduce associated deaths by 10X – Oct 2011 5040 Noontime sun and D, UV and Vitamin D, Cancer - Skin, Cancer, Vitamin D Far from equator 18 Nov, 2013
Too much UVB: skin cancer, too little UVB: other cancers due to low vitamin D – April 2012 7584 UV and Vitamin D, Cancer - Skin 18 Nov, 2013
Vitamin D protects mouse from skin cancer – Sept 2012 3386 UV and Vitamin D, Cancer - Skin 29 Nov, 2012

5 pages in both categories: UV and Vitamin D + Vitamin D Receptor

5 pages in both categories: UV and Vitamin D + Vitamin D Far from equator

3 pages in both categories: UV and Vitamin D + Cancer - Other

5 pages in both categories: UV and Vitamin D + Cancer - Breast

4 pages in both categories: UV and Vitamin D + Meta-analysis of Vitamin D

13 pages in both categories: UV and Vitamin D + Veterinary and Vitamin D

Page Hits Categories Major change
UVB shining of backs of cows increased both milk production and Vitamin D in milk – Jan 2025 7 Veterinary and Vitamin D, UV and Vitamin D 31 Jan, 2025
Pigs were given ultraviolet light or vitamin D daily – Aug 2024 8 Veterinary and Vitamin D, UV and Vitamin D 24 Aug, 2024
UVB not help chickens much (no surprise – shined on feathers, not legs) – March 2023 204 Veterinary and Vitamin D, UV and Vitamin D 21 Mar, 2023
More UVB results in more Vitamin D (chimps in zoos in this case) – Oct 2022 2476 Veterinary and Vitamin D, UV and Vitamin D 21 Oct, 2022
Chicken bones, eggs, and activated vitamin D in eggs increased with 2 hours of daily UVB – Dec 2019 2199 Veterinary and Vitamin D, UV and Vitamin D 23 Dec, 2019
Vitamin D in eggs increased 4X after UV lighting near legs was added – April 2019 1731 Veterinary and Vitamin D, UV and Vitamin D 25 Jul, 2019
Insects create Vitamin D from light (similar to most animals) – July 2018 4963 Veterinary and Vitamin D, UV and Vitamin D 19 Jul, 2018
Ultraviolet B needed for indoor cows to have enough vitamin D in milk – June 2015 3310 Veterinary and Vitamin D, UV and Vitamin D 29 Jun, 2015
Even cows need more than 90 minutes in the sun each day – Feb 2012 2214 Veterinary and Vitamin D, Noontime sun and D, UV and Vitamin D 21 Jun, 2015
UVB on legs of chickens resulted in 70 IU vitamin D per egg yoke – July 2013 5952 Veterinary and Vitamin D, Food sources for Vitamin D, UV and Vitamin D 13 Jan, 2015
Reptiles ate as well with all UV sources – Jan 2011 6213 Veterinary and Vitamin D, UV and Vitamin D 11 Aug, 2012
Health and Light - Ott 1973 30134 Veterinary and Vitamin D, UV and Vitamin D 02 Sep, 2011
Some fish can see in UV – Feb 2010 1407 Veterinary and Vitamin D, UV and Vitamin D 05 Jul, 2010

2 pages in both categories: UV and Vitamin D + Cancer - Bladder

22 pages in both categories: UV and Vitamin D + Multiple Sclerosis

Page Hits Categories Major change
UV prevents and treats autoimmune diseases like MS - SciAm - May 2025 UV and Vitamin D, Multiple Sclerosis, Autoimmune 21 May, 2025
Multiple Sclerosis treated equally by UVB and weekly 50,000 IU of Vitamin D – RCT July 2023 1143 UV and Vitamin D, Multiple Sclerosis, Intervention, Intervention - non daily 18 Jun, 2023
Mutiple Sclerosis half as likely in children spending 30 to 60 minutes per day in the sun – Dec 2021 1898 Noontime sun and D, UV and Vitamin D, Multiple Sclerosis 11 Dec, 2021
Sun reduces risk of Multiple Sclerosis via both Vitamin D and another way – Dec 2019 1069 UV and Vitamin D, Multiple Sclerosis 30 Dec, 2019
UV helped EAE mice (MS) designed to not respond to Vitamin D – Oct 2019 3239 UV and Vitamin D, Multiple Sclerosis 23 Oct, 2019
Multiple Sclerosis half as likely if get plenty of sunshine (not a news item) – March 2018 1914 UV and Vitamin D, Multiple Sclerosis 09 May, 2019
MS prevention by UV is 2X better than prevention by vitamin D levels – Jan 2012 4919 UV and Vitamin D, Multiple Sclerosis 16 Oct, 2018
Multiple Sclerosis 2X more likely if low winter UV – June 2018 5323 UV and Vitamin D, Multiple Sclerosis, Vitamin D Far from equator 23 Jun, 2018
Clinically Isolated Syndrome progresses to Multiple Sclerosis, unless UVB treatments – RCT Dec 2017 3780 UV and Vitamin D, Multiple Sclerosis, Top news 17 Dec, 2017
Vitamin D and Sun conference – Germany June 2017 5016 Noontime sun and D, UV and Vitamin D, Multiple Sclerosis, Vitamin D in Europe, Conference 28 May, 2017
Multiple Sclerosis suppressed by an Ultraviolet wavelength not associated with Vitamin D (mice) – Nov 2016 2506 UV and Vitamin D, Multiple Sclerosis 03 Dec, 2016
Multiple Sclerosis helped by UV – possibly via cytokines, etc. – Oct 2015 5497 UV and Vitamin D, Multiple Sclerosis 07 Sep, 2016
Hypothesis – Multiple Sclerosis risk increases with low UV, viral infections, and antibiotics in childhood – March 2015 6916 UV and Vitamin D, Multiple Sclerosis, Infant-Child, Antibiotics, probiotics 31 Aug, 2016
Lack of UV 20X more associated with MS than any other variable – Dec 2010 4958 UV and Vitamin D, Multiple Sclerosis, Top news 15 Apr, 2016
Hypothesis - more in sunshine than vitamin D to reduce MS – Feb 2010 4132 UV and Vitamin D, Multiple Sclerosis 11 Aug, 2015
How UVB reduces autoimmune diseases such as Multiple Sclerosis – April 2014 8831 UV and Vitamin D, Multiple Sclerosis, Autoimmune 07 Mar, 2015
Mouse MS: UVB but not Vitamin D reduced incidence - April 2010 6179 UV and Vitamin D, Multiple Sclerosis 05 Jun, 2014
UV decreases Multiple Sclerosis via cis-urocanic acid (and via vitamin D) – June 2013 10818 UV and Vitamin D, Multiple Sclerosis, Top news 28 Jun, 2013
There is more in UV than vitamin D which suppresses MS in mice – April 2010 5019 UV and Vitamin D, Multiple Sclerosis 17 Oct, 2012
UV produces more than vitamin D – Aug 2011 16253 Breathing, UV and Vitamin D, Multiple Sclerosis, Psoriasis 30 Jun, 2012
MS UV and Vitamin D – 2009 2624 UV and Vitamin D, Multiple Sclerosis 01 Aug, 2010
Lack of UV increased offspring MS - April 2010 4687 UV and Vitamin D, Multiple Sclerosis 19 Jul, 2010

4 pages in both categories: UV and Vitamin D + Intervention

3 pages in both categories: UV and Vitamin D + Skin - Dark

18 pages in both categories: UV and Vitamin D + Skin

Page Hits Categories Major change
Skin Aging and Vitamin D - many studies Noontime sun and D, UV and Vitamin D, Skin 08 Feb, 2022
Sunburning reduced by 200,000 IU of Vitamin D – RCT April 2017 Noontime sun and D, UV and Vitamin D, Intervention, Skin 28 Nov, 2021
Vitiligo associated with low vitamin D (Note: Vit. D and UV has treated it for over a decade) – meta-analysis March 2021 2180 UV and Vitamin D, Meta-analysis of Vitamin D, Skin 20 Apr, 2021
UVB phototherapy (which increases Vitamin D and VDR) decreased risk of many heart and stroke problems – July 2020 4450 UV and Vitamin D, Cardiovascular, Stroke, Skin 29 Jul, 2020
Sunscreen (SPF-30) slightly increased the vitamin D from UVB – RCT Jan 2019 4976 UV and Vitamin D, Skin 21 Mar, 2019
Vitamin D Receptor in vitiligo skin activated by UVB – May 2018 4355 UV and Vitamin D, Skin, Vitamin D Receptor 11 Nov, 2018
Vitiligo (loss of skin pigment) treated by narrowband UVB 8675 UV and Vitamin D, Skin 30 Sep, 2018
Ultraviolet light (which produces vitamin D) decreased the use of psoriasis drugs for a year – Aug 2017 4322 UV and Vitamin D, Psoriasis, Skin 05 Aug, 2017
UVB increases vitamin D even if poor kidney by changing CYP27B1 genes in skin – Dec 2013 4025 UV and Vitamin D, Kidney, Genetics , Skin, CYP27B1 05 Aug, 2017
Phototherapy and vitamin D – Sept 2016 2847 UV and Vitamin D, Psoriasis, Skin 25 Dec, 2016
Overview Skin and vitamin D 45056 Noontime sun and D, UV and Vitamin D, Overviews, Skin 13 Jan, 2015
For small amounts of sunshine the amount of skin exposed may not matter – Jan 2011 7641 Noontime sun and D, UV and Vitamin D, Skin 13 Jan, 2015
Many other anti-cancer photoproducts generated on the skin in addition to vitamin D – Jan 2014 5813 UV and Vitamin D, Skin 19 Aug, 2014
Eczema not reduced in small study which used narrowband UVB to raise vitamin D levels – Feb 2014 7940 UV and Vitamin D, Skin 14 Feb, 2014
Dermatologists view of UV radiation and the Skin – June 2013 7338 Noontime sun and D, UV and Vitamin D, Mortality and D, Skin 07 Jun, 2013
Intense UV damages cadaver skin– Oct 2012 4613 Noontime sun and D, UV and Vitamin D, Skin 09 Nov, 2012
Possible DNA damage of skin if vitamin D levels less than 20 nanograms – April 2012 6413 Noontime sun and D, UV and Vitamin D, Skin 09 Nov, 2012
Wrinkles and UVB 7118 UV and Vitamin D, Skin 06 Jul, 2011

4 pages in both categories: UV and Vitamin D + Gut

4 pages in both categories: UV and Vitamin D + Immunity

5 pages in both categories: UV and Vitamin D + Vision

2 pages in both categories: UV and Vitamin D + Cancer - Pancreatic

5 pages in both categories: UV and Vitamin D + Cancer - Lymphoma

2 pages in both categories: UV and Vitamin D + Autoimmune

4 pages in both categories: UV and Vitamin D + Infant-Child

5 pages in both categories: UV and Vitamin D + Vitamin D in Europe

2 pages in both categories: UV and Vitamin D + Conference

2 pages in both categories: UV and Vitamin D + High Risk

2 pages in both categories: UV and Vitamin D + Shut-in

2 pages in both categories: UV and Vitamin D + Orient

4 pages in both categories: UV and Vitamin D + Genetics

3 pages in both categories: UV and Vitamin D + Middle East

3 pages in both categories: UV and Vitamin D + Metabolic Syndrome

2 pages in both categories: UV and Vitamin D + Video page names

5 pages in both categories: UV and Vitamin D + Food sources for Vitamin D

5 pages in both categories: UV and Vitamin D + Seniors

2 pages in both categories: UV and Vitamin D + AI

2 pages in both categories: UV and Vitamin D + Overviews

2 pages in both categories: UV and Vitamin D + How much Vitamin D

2 pages in both categories: UV and Vitamin D + Associations

3 pages in both categories: UV and Vitamin D + Predict Vitamin D

2 pages in both categories: UV and Vitamin D + Breathing

2 pages in both categories: UV and Vitamin D + Kidney

2 pages in both categories: UV and Vitamin D + Forms of Vitamin D

3 pages in both categories: UV and Vitamin D + CYP27B1

2 pages in both categories: UV and Vitamin D + Vitamin D in Australia and New Zealand


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