Vitamin D is also readily available in food. You can get plenty by eating brown portabella mushrooms. I often read sunshine vs supplements discussed, and rarely food sources.
Regular use of Vitamin D supplement is associated with fewer melanoma cases
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Re: Regular use of Vitamin D supplement is associated with fewer melanoma cases
#12Vitamin D is also readily available in food. You can get plenty by eating brown portabella mushrooms. I often read sunshine vs supplements discussed, and rarely food sources.
Vitamin D isn't in high enough sources in foods. Not unless you're eating a ~cup of them a day or in the days you aren't taking the supplement. This is important because the study went into differences between "occasional" and "regular" vitamin D supplement users.
Mushrooms are very good for many other reasons and should be a staple in most weekly diets.
Re: Regular use of Vitamin D supplement is associated with fewer melanoma cases
#13I was told recently that US Doctors have lost their license over this topic; no idea if that is true.
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Re: Regular use of Vitamin D supplement is associated with fewer melanoma cases
#14Re: Regular use of Vitamin D supplement is associated with fewer melanoma cases
#15People who avoid the sun more likely to take vitamin D supplements?
People who avoid the sun are less likely to care about health overall and therefore less likely to take vitD supplements?
Re: Regular use of Vitamin D supplement is associated with fewer melanoma cases
#16People who avoid the sun more likely to take vitamin D supplements?
I don’t have access to the full paper, but I would expect that they at least tried to control for sun exposure.
In general, if you can think of an obvious confounding factor in about five seconds, then it’s a safe assumption that professional researchers thought of it too.
Re: Regular use of Vitamin D supplement is associated with fewer melanoma cases
#17Re: Regular use of Vitamin D supplement is associated with fewer melanoma cases
#18People who avoid the sun more likely to take vitamin D supplements?
This is the most plausible reason.
The most plausible reason is that the scientific peer-reviewed result is correct, not the tiring "correlation does not imply causatian" commenter on HN who at most skimmed the paper.
2009: > Epidemiological data show an inverse relationship between vitamin D levels and breast cancer incidence. In addition, there is a well-documented association between vitamin D intake and the risk of breast cancer. Low vitamin D intake has also been indicated in colorectal carcinogenesis. A vitamin D deficiency has also been documented in patients with prostate cancer, ovarian cancer, as well as multiple myeloma. Larger randomized clinical trials should be undertaken in humans to establish the role of vitamin D supplementation in the prevention of these cancers.
Re: Regular use of Vitamin D supplement is associated with fewer melanoma cases
#19People who avoid the sun more likely to take vitamin D supplements?
Tweedledee: People with less sun exposure both intentional or unintentional may supplement more.
Tweedledum: Low Vitamin D weakens your immune system. Having a weakened immune system increases your odds of skin cancer.
Re: Regular use of Vitamin D supplement is associated with fewer melanoma cases
#20People who avoid the sun more likely to take vitamin D supplements?
I think just as likely is the general problem of people who take supplements being generally more conscientious and less likely to engage in risky behaviours (e.g. wearing sunscreen in summer)