The recommendation to avoid UV exposure at all is just wrong indeed. The harm from UV is highly non-linear function of dose. It could be that in low doses when the body can quickly and fully recover it decreases the risk of melanoma through compensatory mechanisms. And even if this is not the case, one needs very short exposure to high Sun to get daily dose of D when risk of melanoma is significantly lower than most other risk factors one constantly meets throughout the life.<p>As for D supplements, one really should very careful even in cases of high latitudes (and this is the reason I avoid D supplements despite living at 61th parallel). Quoting Paul Albert , <a href="http:&#x2F;&#x2F;bacteriality.com&#x2F;wp-content&#x2F;uploads&#x2F;2009&#x2F;08&#x2F;Albert_IOM_Speech_080409.pdf" rel="nofollow">http:&#x2F;&#x2F;bacteriality.com&#x2F;wp-content&#x2F;uploads&#x2F;2009&#x2F;08&#x2F;Albert_IO...</a> :<p>So are we really facing an epidemic of vitamin D &quot;deficiency&quot; or are we simply beginning to note more signs of an imminent epidemic of chronic disease – an epidemic which would be exacerbated by increasing the amount of vitamin D added to our food supply?