How Quickly Does Sunlight Raise Vitamin D Levels? The Ultimate Guide
                                
                                
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                                    5 min read                                
                            
                                It's estimated that nearly 50% of the global population has insufficient vitamin D, but the speed at which sunlight can raise vitamin D levels varies greatly depending on several key factors. While a short burst of sunlight can initiate production, the actual time it takes to see a significant change depends on more than just the clock.