Table of contents
- Consensus on the following:
- See also VitaminDWiki
- See also VitaminDWiki UVA and Melanoma
- See also web
- Clipped from SkinCheck org Where does Melanoma occur
- From: Vitamin D from Sunbeds
- From: Sunbed survey in Ireland
- From: UV creates Vitamin D
- GrassrootsHealth Melanoma & sunscreen associated in 7 studies (PDF and video)
- Chart from http://www.detertec.com/sun_radiometry.html
- Current sunscreen controversies: a critical review.
- Germany also considers that adding vitamin D might reduce melanoma
- Some Chinese are really wanting to get whiter skin or avoid Skin Cancer/Wrinkles
- Sunshine: Dangerous or Healthy? 2009
- Alcohol and Melanoma: More Proof that this Deadly Skin Cancer is not caused by Sunlight
- If already have had skin cancer, a form of Vitamin B3 lowers the rate of future ones by 23% - RCT May 2015
- 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
Sunburn (Erythema), cataracts, and development of skin cancer are related mostly to UVB radiation.
Ban all people under age 18 from using tanning beds
Increase alcohol consumption is strongly associated with increased melanoma (see bottom of page)
- All items in Cancer-Skin and Vitamin D
- Sunburning reduced by 200,000 IU of Vitamin D – RCT April 2017
- Skin cancer (in mice) due to UV was prevented by vitamin D (active, topical) – June 2016
- Thin epidermis under skin cancer was thickened when vitamin D was raised to 70 ng – April 2014
- Fewer heart attacks, hip fractures and deaths if more skin cancer – Sept 2013 Skin cancer is a proxy for getting more UVB ( Vitamin D)
- Melanoma not as thick if recently had a sunny vacation – Nov 2013
- Vitamin D receptor may suppress skin cancer – Dec 2013
- No association found between melanoma and low levels of vitamin D – Sept 2012
- More sun skin damage if vitamin D less than 20 ng – Sept 2012
- Scared Out of the Sun for Fifty Years – Jan 2011
- China has documented that less UV results in more cancer – June 2010
- AAP Issues Guidelines on Limiting Sun Exposure in Children – Feb 2011
- Perhaps 28-40 ng of vitamin D would be good for Melanoma patients – Feb 2011
- Sunlight alone does not cause skin cancer - July 2010 Natural News - 13 bullet points and linked video
- Perhaps not burn from the sun if have enough vitamin D
- If avoiding sun for medical reasons, you need oral vitamin D – April 2011
- Shade is better than sunscreen – does not eliminate the vitamin D – June 2011
- Native American Indians mostly died of skin cancer
- What? You never heard that? Right. Because it didn't happen.
- Discussion on second cancers after melanoma – Jan 2012
- Possible DNA damage of skin if vitamin D levels lower than 20 nanograms – April 2012
- UV spectra of the sun and sunscreens
- Overview UV and Vitamin D
- Vitamin D protects DNA against UV skin damage – Oct 2012
- Possible DNA damage of skin if vitamin D levels lower than 20 nanograms – April 2012
- Overviews of Cancers (including Melanoma) by Vitamin D Council
- Optimize vitamin D from the sun
- Overview Skin and vitamin D
- All items in category Noontime Sun and vitamin D
- Tanning while getting little vitamin D
- No – 10 minutes per day of sun-UVB is NOT enough
- Doctor survey: 64 % feel 10 minutes of sun is enough, 33 % say use sunscreen winter – May 2012 500 doctors in Australia
- A life history perspective on skin cancer and the evolution of skin pigmentation Jan 2014 PDF is at the bottom of this page
Compares various ideas about skin cancer and pigmentation
- Vitamin D from phototherapy lamps, tanning beds, and the sun – Jan 2012 has the following chart
Note Blue area is < 1,000 IU per day from UVB with full body exposure
- UVA causes skin cancer, perhaps UVB (Vitamin D) prevents skin cancer – Jan 2017
- Melanoma REDUCED by those getting the most UV, unless 5 blistering sunburns while in teen years – June 2014
- Melanoma is 44 percent LESS LIKELY if get sun on the job – Nov 2013
- UV Radiation and the Skin June 2013
- UVA most likely causes melanoma to progress– Sept 2011
- PABA sunscreen does not absorb UVA which causes melanoma
- UVB causes sunburn - UVA causes melanoma - 2011.PDF
- Hypothesis – worldwide increase in Melanoma due to UVA – Oct 2011
- Indoor Tanning Boosts Chances of Melanoma - perhaps because of UVA in some tanning beds
- Hypothesis: UVA through window glass decreases vitamin D - 2009
- 90 % of Melanoma Surgeries are Unnecessary Nov 2012
reporting on study in Journal of the American Academy of Dermatology"300,215 melanoma excision cases. 10 years, 13 countries.
- Cutaneous melanoma: how does ultraviolet light contribute to melanocyte transformation? 2008
"Ascribing a causal role to ultraviolet radiation in melanoma induction is problematic, as the relationship between total lifetime sun exposure and melanoma risk is not as strong as for some other skin cancers."
- Low Serum 25-Hydroxyvitamin D Concentrations Are Associated with Increased Risk for Melanoma and Unfavourable Prognosis Dec 2014
Low vitamin D thicker skin cancer and shorter life: 80 months vs 195 months - Full text online, PLoS One
- http://aesthetica.com/sunscreen UV vs sunscreen chart
Clipped from SkinCheck org Where does Melanoma occur
- Anywhere, including places never exposed to the sun.
- In Caucasian males, the most common location is the trunk (especially the back).
- In Caucasian females, the most common locations are the legs (especially the back of lower legs) and trunk.
- Among Asians, Hispanics, and African-Americans, the most common locations are the feet and hands.
Skin is lighter (less melatonin), so more UVB can damage the feet and hands
From: UV creates Vitamin D
GrassrootsHealth Melanoma & sunscreen associated in 7 studies (PDF and video)
Chart from http://www.detertec.com/sun_radiometry.html
Red = sunlight (probably on ground); other lines = amount of light filtered thru different sunscreens
Photodermatol Photoimmunol Photomed. 2011 Apr;27(2):58-67. doi: 10.1111/j.1600-0781.2011.00557.x.
Burnett ME, Wang SQ., Dermatology Service, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.
Background/purpose: Sunscreens are believed to be a valuable tool in providing photoprotection against the detrimental effects of UV radiation, a known carcinogen. However, a number of controversies have developed regarding their safety and efficacy. This review summarizes the relevant studies surrounding these controversies.
Methods: Evidence of the prevention of skin cancer, an oft-cited reason for sunscreen use, was examined as it pertains to squamous cell carcinoma, basal cell carcinoma and melanoma. We also reviewed studies examining the effects of sunscreen on the synthesis of vitamin D, an essential nutrient whose role in health and disease continues to grow. Lastly, we analyzed studies surrounding the safety and toxicity of oxybenzone, retinyl palmitate and nanoparticles of zinc oxide (ZnO) and titanium dioxide (TiO(2) ).
Results: The overwhelming majority of available data is drawn from studies conducted using antiquated sunscreen formulations.
Nonetheless, our research revealed that topical use of sunscreen protects against squamous cell carcinoma, does not cause vitamin D deficiency/insufficiency in practice and has not been demonstrated to adversely affect the health of humans.
Conclusion: Given the established benefits of UV protection, the use of sunscreens remains an important part of an overall photoprotective strategy. Future sunscreens with improved formulation should ideally offer superior protection. With increased usage of sunscreen by the public, continuous and vigilant monitoring of the overall safety of future products is also needed.
© 2011 John Wiley & Sons A/S. PMID: 21392107
Serum 25-hydroxyvitamin D serum levels in a large German cohort of melanoma patients.
Br J Dermatol. 2012 Aug 9. doi: 10.1111/j.1365-2133.2012.11212.x.
Gambichler T, Bindsteiner M, Höxtermann S, Kreuter A.
Department of Dermatology, Ruhr-University Bochum, Bochum, Germany.
Background:? Observational studies have suggested that 25-hydroxyvitamin D (25OHD) is associated with better outcomes in patients with malignant melanoma (MM).
Objectives:? To study the relationship between serum 25OHD levels and clinical parameters in a large German cohort of MM patients.
Methods:? We prospectively investigated the 25OHD serum levels of 764 MM patients using the direct competitive chemiluminescence LIAISON® immunoassay.
MM patients taking 25OHD supplements were not included.
Results:? Median serum 25OHD baseline levels were 12.3 ng/ml (lower quartile: 7.3 ng/ml, upper quartile: 20.2 ng/ml). 564 (764/73.8%) patients had 25OHD deficiency (25OHD < 20 ng/ml), 188 (764/18.8%) had 25OHD insufficiency (25OHD ? 20 < 30 ng/ml), and only 55 (764/7.2%) patients had serum 25OHD levels within the normal range (? 30 ng/ml). Using a multiple regression model, lower 25OHD levels were significantly associated with higher Breslow tumour thickness (class: < 1 mm; ? 1 - 4 mm; > 4 mm: regression coefficient -1.45, P = 0.028) and higher AJCC 2002 melanoma stage (regression coefficient: -0.79, P = 0.036).
Conclusions:? In MM patients, decreased 25OHD serum levels are associated with increased tumour thickness and advanced tumour stage.
Hence, evidence is accumulating that patients with MM might benefit from 25OHD supplements.
Copyright © 2012 British Association of Dermatologists. PMID: 22880705
Meet the 'Face-Kini', the latest craze to hit China's beaches as bathers wear masks to beat the sun's harmful raysDailyMail UK Aug 2012 - which have photos like the following
- Comment in a NYT interview of Dr. Bernard Ackerman, Demratoligist, who has authored 600 papers
"the field is just replete with nonsense." For example, Dr. Ackerman does not believe that the link between melanoma and sun exposure (a central dogma of dermatology) has been proven.
He is deeply tanned and is not afraid to expose his body to the sun. Dr. Ackerman does, however, recommend that folks avoid excessive skin exposure to avoid premature aging of the skin.
He also does not believe that sunburn, even the kind that causes blistering of the skin, necessarily leads to cancer later in life.
Basically, according to Dr. Ackerman, "the research is inconsistent and fails to make the case."
Sunlight Institute, Nov 2013
- 1993 study: women who drank two or more drinks per day had an increased risk of melanoma of 250%.
- Oct 2013 study
(1) 7+ drinks per week had a 64% increased risk of melanoma;
(2) higher lifetime alcohol consumption was positively correlated to risk of the disease;
(3) higher current alcohol consumption similarly correlated to a higher risk:
(4) current alcohol intake also predicted higher risk;
(5) a preference for white wine or liquor also predicted increased risk.
- Sunlight Instutiute refutes the claim that melanoma is caused by sunlight
If already have had skin cancer, a form of Vitamin B3 lowers the rate of future ones by 23% - RCT May 2015
- Common vitamin reduces recurrence of some skin cancers Washington Post
Year-long study in Australia using 500 milligrams of nicotinamide twice a day
Vitamin B3 provides skin cells with a boost of energy and intensifies the rate of skin repair.
"It's safe, it's almost obscenely inexpensive and it's widely available,"
People who haven't been diagnosed with such cancers should not take nicotinamide preventively, she said.
Results will be presented in late May 2015 at American Society of Clinical Oncology conference in Chicago
- Oral Nicotinamide (A Form of Vitamin B3) Significantly (23%) Reduces Rates of New Non-Melanoma Skin Cancers in Those at High Risk of These Skin Cancers