How much OTC potassium should I take?
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                The U.S. Food and Drug Administration (FDA) limits the amount of potassium chloride in over-the-counter (OTC) supplements to a maximum of 99 mg per serving. This means that the small dose found in most OTC products is not a significant source of this essential mineral and is intended for general dietary support rather than therapeutic use.