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Vitamin D deficiency affects a significant portion of the global population, leading to various health issues. Key warning signs include persistent fatigue, frequent illnesses due to a weakened immune system, and unexplained muscle weakness or pain. Mood changes like depression and bone pain can also indicate low vitamin D levels, highlighting the importance of monitoring and addressing this deficiency.

A recent study by the University of South Australia reveals a significant link between vitamin D deficiency and an increased risk of dementia and stroke. Analyzing data from the UK Biobank, researchers found that low vitamin D levels are associated with lower brain volumes.