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TB-500:4963 g/mol
However, the absence of large-scale human trials, FDA approval, and standardized sourcing means that patients should proceed with caution
Oral B12 supplements are absorbed at roughly 1 to 5% in healthy adults, and even less in people with low intrinsic factor, atrophic gastritis, or gut absorption issues
doi:10.3390/ijms19071987 12
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