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RDI: 1.3 mg for men, 1.1 mg for women No established UL B3 (Niacin): Involved in energy metabolism, DNA repair, and supports healthy cholesterol levels
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This matters because many adults with low B12, whether from dietary restriction, aging, or conditions like pernicious anemia, cannot absorb enough B12 through food or oral supplements alone
Combining topical products may affect: Scalp irritation Product absorption Formulation stability Application timing Consistency with treatment Professional guidance can help determine whether products should be used together, applied at different times, or avoided based on the condition of the scalp
Many of these symptoms are not specific to B12 deficiency but can also occur in other disorders
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