Can I Drink Coffee While on ProLon? What the FMD Protocol Says
                                
                                
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                                    4 min read                                
                            
                                The ProLon Fasting Mimicking Diet (FMD) is carefully formulated to down-regulate specific nutrient-sensing pathways, which helps trigger cellular rejuvenation. To protect this process, the official guidelines state that while it is best to avoid caffeine, a limited amount of plain black coffee is permitted for those who need it.