Uploaded May 2022 | Updated September 2026, 9 hours ago

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In this episode, I discuss the research and recommendations on a link between excess vitamin A intake and neural tube birth defects (PMIDs 7477116, 22516730). I show that eating beef liver supplements--and especially beef liver itself--as directed by Liver King (Brian Johnson) and Paul Saladino--increases the risk of birth defects in the offspring of women taking them, especially in the context of a vitamin A-rich diet. Liver is extremely high in vitamin A--excessively high if consumed regularly as part of a vitamin A-rich diet--and caution should be employed by women who consume these supplements and might become pregnant.

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