How Serious is a Lack of Vitamin D? Understanding Risks, Symptoms, and Solutions
                                
                                
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                                    3 min read                                
                            
                                According to the Cleveland Clinic, a staggering 1 billion people worldwide have a lack of vitamin D, making it a common and often undiagnosed global issue. Understanding how serious is a lack of vitamin D is crucial, as this deficiency can significantly impact everything from skeletal strength to mental and immune health.