How long does shakiness from caffeine last?
                                
                                
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                                    3 min read                                
                            
                                The average half-life of caffeine is approximately 5 to 6 hours for a healthy adult, meaning that after this time, half of the consumed caffeine remains in the system. However, the duration of its jittery effects can range from 3-5 hours to over 12 hours depending on individual factors.