The Scientific Quest: How Was Vitamin D Deficiency Discovered?
                                
                                
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                                    3 min read                                
                            
                                Rickets, a debilitating bone disease now known to be caused by vitamin D deficiency, once plagued up to 80% of children in the smog-filled, industrial cities of 17th-century Britain. This devastating epidemic spurred centuries of scientific inquiry into its mysterious origins, ultimately leading to the discovery of vitamin D and its critical role in human health.