Do You Have to Fast for Potassium? What to Know About Your Blood Test
                                
                                
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                                    4 min read                                
                            
                                Did you know that potassium, a critical electrolyte, plays a vital role in nerve and muscle function, and an imbalance can cause serious health issues? If your doctor has ordered a blood test to check your levels, you might be asking, do you have to fast for potassium to ensure an accurate result.