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Although approximately 30% of vitamin B12 is lost during cooking, red meat derived B12 has both the highest quantity in food AND the highest bioavailability (amount absorbed) with up to 90% absorbed in the small intestine (7, 8)

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[DOI] [PubMed] [Google Scholar] 17.Peterson RE, Imperato-McGinley J, Gautier T, Shackleton CHL

Thus, we further note that prohibited practices include all other conduct in violation of Federal antidiscrimination laws, including any unlawful practices under the Attorney General's Guidance for Recipients of Federal Funding Regarding Unlawful Discrimination (July 29, 2025)

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Study 3: Heffernan 2000, oral administration Citation: Heffernan M., Jiang W.J., Thorburn A.W., Ng F.M