Understanding the Environmental Causes of Vitamin D Deficiency
                                
                                
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                                    5 min read                                
                            
                                Approximately 90% of the body's vitamin D is synthesized through exposure to sunlight, yet studies show deficiency is a major global health problem affecting millions. While diet and genetics play a role, a significant and often overlooked aspect is the influence of our environment. Understanding these external factors is crucial for prevention.