Is tonic water good for aching legs? An evidence-based analysis
                                
                                
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                                    4 min read                                
                            
                                Historically, quinine from cinchona bark was used to treat malaria, but the idea that a small amount of quinine in tonic water is good for aching legs is a widely circulated myth with little scientific backing. The FDA has even warned against its use for leg cramps due to serious potential side effects.