What vitamin deficiency causes thumb twitches?
                                
                                
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                                    5 min read                                
                            
                                According to research on nutritional factors, deficiencies in essential minerals and vitamins, particularly magnesium, calcium, and vitamin B12, are among the most common causes of muscle fasciculations, including thumb twitches. These involuntary muscle movements often result from an imbalance in the electrolytes that regulate nerve and muscle function.