Many health benefits have been attributed to having higher vitamin D levels in the blood.

Examples include reduced risk of musculoskeletal disorders, infectious diseases, autoimmune diseases,

cardiovascular disease, diabetes, several types of cancer, neurocognitive dysfunction,

adverse pregnancy and birth outcomes, and all cause mortality.

But most such attributions are based on observational studies, meaning just drawing correlations

between the two, and having high

vitamin D levels may just be a marker of good health.

After all, vitamin D is the sunshine vitamin who has higher levels of vitamin D in their

blood, people who run around outside.

So maybe the D is just a marker for exercise, and that's really what's lowering disease risk.

And indeed, when vitamin D supplements are actually put to the test in randomized controlled

trials, they often fail to support a direct vitamin D benefit.

In this video, I'm going to explore the randomized controlled trial data on vitamin D supplementation

for COPD, chronic

obstructive pulmonary diseases like emphysema, critical illness like whether we should

be giving vitamin D to people in the ICU, cardiovascular disease like heart attacks and strokes,

preventing depression, treating depression, vitamin D for weight loss, and vitamin D for lung cancer

survival, prostate cancer survival, and vitamin D for lung cancer survival, prostate

cancer survival, and colorectal cancer survival.

What do you think?

Do you think vitamin D supplements will help with some of them?

All of them?

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