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The FDA does not approve compounded medications for safety, quality, or manufacturing

These issues may range from mild to severe depending upon the extent of overdose

A Schilling test, which distinguishes intrinsic factor-related malabsorption, can be used to diagnose pernicious anemia (Table 3)
Folic acid, potassium, vitamin C and chloramphenicol, a type of broad-spectrum antibiotic, may all interfere with vitamin B12 in the body
