How Much Vitamin B12 Should I Take Daily for Hair Growth?
                                
                                
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                                    4 min read                                
                            
                                According to the NIH Office of Dietary Supplements, adults over 14 have a daily recommended dietary allowance (RDA) for vitamin B12. Understanding the specific amount of vitamin B12 you should take daily for hair growth depends largely on your current nutritional status, as most benefits related to hair are seen in cases of deficiency.