How safe is OPTIFAST? A comprehensive guide to its safety and side effects
                                
                                
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                                    4 min read                                
                            
                                With over 40 years of use and more than 80 clinical studies, OPTIFAST is a well-established and clinically proven very low-calorie diet (VLCD) for weight loss. Despite its track record, its highly restrictive nature means understanding exactly how safe is OPTIFAST and what precautions are necessary is crucial before starting the program.