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1 2 "Vitamin B12 production by Citrobacter freundii or Klebsiella pneumoniae during tempeh fermentation and proof of enterotoxin absence by PCR"
High blood potassium levels and symptoms related to polycythemia vera, a blood disorder, can occur
no formulation, dosing, or administration claims are made or implied
For example, one study found that after taking 1,000 mcg of oral vitamin B12, only about 1.3% (13 mcg) is absorbed into the bloodstream
Combined supplementation improves resistance to infections and supports faster recovery
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