Sorry, what? Please provide some sources for these claims.<p>As far as I&#x27;m aware melanoma is most definitely related to sun exposure and there is no consensus opinion on vitamin-D and cancer prevention, with the most evidence being for it being protective against certain bowel cancers..<p>Edit: Here&#x27;s a source for my view: <a href="http:&#x2F;&#x2F;www.nhs.uk&#x2F;livewell&#x2F;summerhealth&#x2F;documents&#x2F;concensus_statement%20_vitd_dec_2010.pdf" rel="nofollow">http:&#x2F;&#x2F;www.nhs.uk&#x2F;livewell&#x2F;summerhealth&#x2F;documents&#x2F;concensus_...</a> [3rd and 4th bullet points for example]