Which of the following is required for absorption of dietary vitamin B12: intrinsic factor
                                
                                
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                                    4 min read                                
                            
                                Over 6% of the U.S. population aged 60 and older are estimated to have a vitamin B12 deficiency. While the digestive system performs many functions, the absorption of dietary vitamin B12 specifically requires a protein called intrinsic factor to be successful.