What Lack of Vitamins Causes Extreme Tiredness and How to Fix It
                                
                                
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                                    5 min read                                
                            
                                According to the World Health Organization, iron deficiency is the most common nutritional deficiency worldwide, a leading cause of extreme tiredness and fatigue. While a hectic schedule or poor sleep hygiene can cause sluggishness, persistent exhaustion is often a key symptom of several vitamin and mineral deficiencies that impact the body's energy production and oxygen transport.