How much B2 can your body absorb?
                                
                                
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                                    4 min read                                
                            
                                Despite taking high-dose supplements, your body has a natural ceiling for absorbing nutrients, and for riboflavin, or B2, this limit is approximately 27 mg per single dose. This limited capacity prevents toxicity and determines how much B2 your body can absorb from both food and supplements.