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Individual variations in intrinsic factor production, genetic polymorphisms affecting B12 metabolism, and the complex interactions between various nutrients and medications can influence B12 status

The headline statistic: 44% of supplements they've tested have failed - meaning they contain less than 95% of the active ingredient on the label

[DOI] [PubMed] [Google Scholar] 184.Romas R.S

[DOI] [PubMed] [Google Scholar] 28.Fettelschoss V., Burda P., Sagn C., Coelho D., De Laet C., Lutz S., Suormala T., Fowler B., Pietrancosta N., Gasnier B., et al

K20 Davis, Jeff

2025 is shaping up to be another highly active year for the FDA enforcement of Current Good Manufacturing Practices (cGMPs)