How do you know if you have a vitamin D deficiency in your head?: Exploring Head-Related Symptoms
                                
                                
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                                    4 min read                                
                            
                                Affecting an estimated 1 billion people worldwide, vitamin D deficiency is a surprisingly common problem. If you're wondering, **how do you know if you have a vitamin D deficiency in your head?**, it's important to understand the subtle yet significant neurological and mental health symptoms that can manifest.