How much niacin flush free should I take? A comprehensive dosage guide
                                
                                
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                                    4 min read                                
                            
                                According to the National Institutes of Health, the Tolerable Upper Intake Level for supplemental niacin for healthy adults is 35 mg daily, a limit primarily based on the flushing side effect of nicotinic acid. However, the correct dosage for flush-free niacin depends heavily on the specific compound and your health goals, as its effectiveness varies dramatically from standard niacin.