Can B12 Deficiency Run in the Family? Understanding Genetic Risks
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4 min read
According to a 2018 review in *Genes & Nutrition*, the heritability of vitamin B12 levels is estimated to be approximately 59%, indicating a significant genetic influence. While diet is a primary factor, this means genetic predisposition can cause B12 deficiency to run in the family, especially through inherited conditions that impair absorption or transport.
