As you can tell by reading the articles on this website, we take an active pro-vitamin D stance. However, that does not mean we support every single notion out there that is pro-vitamin D. Our biggest point is that every vitamin D issue should be resolved by evidence. Gathering and presenting that evidence is both exciting and tricky. The biggest issue is making sure everyone understands the difference between correlation and causation.
There have been literally hundreds of scientific studies over the past decade that show correlations between vitamin D levels and a host of diseases and conditions. You already know this if you’ve read even a handful of the articles on this website. People often want to jump to the conclusion that because higher vitamin D levels are correlated with a decreased risk of such-and-such disease, they should be supplementing vitamin D to get that benefit. The reason that might not work out is because correlation does not prove causation. And in the case of vitamin D, there are still many unanswered questions about whether it’s vitamin D levels causing things to happen, or if various diseases and conditions cause fluctuations in vitamin D levels! Yes, it makes things muddy and confusing and complex, but that’s life. What we’re trying to do on this website is present the evidence as it comes out of the scientific community. That means we will report about exciting correlations that later prove to be nothing more than that, just a correlation and not a causation.
This means we will also present both sides of vitamin D issues. For example, we recently summarized research that showed a correlation between vitamin D and cholesterol levels, raising the notion that more vitamin D might lower cholesterol, but another study recently published presents evidence calling that into question. There have been studies that try to show that birth disparities between races might have something to do with darker-skinned people being more susceptible to vitamin D deficiency, but a recent study says it’s probably more about socioeconomics than sunshine. Meanwhile, with all the positive news lately about vitamin D and cancer, we must remind ourselves that vitamin D isn’t necessarily a cure-all for every kind of cancer. Indeed, one recent study showed there was no link whatsoever between vitamin D and mesothelioma. Please see the sources below for more information on each of these issues.
Sources for Further Reading: