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Nineteen companies have been banned from making or selling urolithin A supplements in the U.S
TB-500 is listed as a Category 2 bulk drug substance by the FDA, which indicates it is a safety concern and is not permitted for pharmaceutical compounding
The study ultimately concluded that large amounts of vitamin C could negatively affect the readings, not the B12 supply, if the serum sample was heated prior to the radio assay
For example, those with pernicious anemia or poor vitamin B12 absorption need a treatment plan that fits their needs
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